CONDUCTIVE MATERIAL DISPERSED SOLUTION AND SECONDARY BATTERY PREPARED BY USING SAME

Hereinafter, the present invention according to the present invention to aid in more detailed as follows.

The specification range and claim defining the terms or word sense and subsequent analysis or a pre-conventional don't be WD, the best method to account for its own invention in the invention most general outline of a term that technical idea of the present invention to appropriately define a predicated principle to meet the interpreted semantics and general outline must substrate.

Terms used in the present invention 'bundle type (bundle type)' referred not with RM, a plurality of carbon nanotubes is substantially parallel longitudinal axis units units arranged in the same orientation in the form of bundles (bundle) refer to 2 difference shape. The 'non-bundle type (non-a bundle type) or is, [thayng the writing (entangled type)' RM carbon nanotube bundle or rope type units into a specific shape to the cavity without perplexing is big.

Using conventional carbon nanotubes including a conductive material of the electrode morning fair number, in order to enhance dispersibility of carbon nanotube dispersion medium having a high pressure liquid coolant line number after micropores dispersion, etc. high pressure liquid coolant composition for forming electrode and electrodes using the same number. The electrode and the battery characteristics, in particular in order improving characteristic cell falls for electrode formation which has an aqueous dispersion composition viscosity and suitable conductors and must, in order same conductive material dispersion can be measured and evaluated for dispersibility conductive material should hereinafter.

Conventional conductive material particle size analyzer (particle size analysis, PSA) conductive material dispersion diagram for measuring dispersion particle size distribution was assessed. However, as in the case of carbon nanotube bundle type linear of carbon nanotubes according to the angle measurement since different particle size, the dispersion of dispersion assessment to tame. In addition, hyperpolarized acid when it linear of carbon nanotubes, the output characteristics of the battery by contact resistance can be significantly reduced equipment disclosed.

In the present invention about the electrode using a conductive material including carbon nanotubes bundle type (bundle a-type) morning fair number, complex modulus (modulus Complex (shear), |G *|@ 1Hz) number of conductive material dispersion [...] through high power characteristics on both inner and dispersion of conductive material forming electrode of conductive material dispersion having a viscosity property number [...] substrate.

I.e., one in the embodiment according to conductive material dispersion of the present invention,

Bundle-type carbon nanotubes including conductive material;

Hydrogenated nitrile rubber dispersion number; and

A dispersion medium which,

(Rheometer) when measuring frequency 1Hz rheometer, the 20Pa 500Pa to complex modulus (|G *|@ 1Hz) are disclosed.

In the present invention, complex modulus or complex shear modulus as a quantity representative of dynamic viscoelasticity conductive material dispersion, material and size of elastic energy is accumulated in a means, resulting in the phase difference becomes smaller to be a solid in a liquid state. In the present invention the complex modulus of elasticity of conductive material dispersion viscosity measuring apparatus, specifically by using a rheometer can. More specifically, after setting a constant distance between the circular rotation of rheometer, filled into the corresponding interval volume corresponding to the conductive material dispersion, when unit 10 1Hz frequency 1/s shear rate^-3 10 in³ In response to measuring the forces generated in the extent to set back rotational plate (shear viscosity) viscous rate can be measured.

Specifically, in the embodiment according to one conductive material of the present invention measured frequency when the complex modulus of elasticity (|G *|@ 1Hz) dispersions rheometer 1Hz to 500Pa 20Pa are disclosed. Conductive material dispersion 20Pa complex elastic modulus is not too low where the viscosity of the dispersion is below, hereinafter for dispersibility without use since the second conductive silicon layer, the complex elastic modulus is not 500Pa exceeds the number increases where the viscosity of the dispersion process for preparing handled by pressure increase in number as well as composition for electrode formation difficult morning fair because it has a high viscoelasticity solids due to reduced pipe equipment disclosed. The complex modulus of elasticity according to improve the dispersion of dispersion conductive material conductive material dispersion number, and using the same high pressure liquid coolant further improving a significant number of electrodes powder resistance reducing and battery output characteristics so that when, said conductive material dispersion complex modulus more specifically to 350Pa 50Pa implementation being.

Further, in the embodiment according to one of the present invention is measured using a shear rate (shear rate) 1/6 rheometer conductive material dispersion. 3s 2Pa when the shear viscosity rate (shear viscosity), to 20Pa s, s can be one having an. By having said low shear viscosity rate as compared to conventional systems, can exhibit excellent dispersion properties than at the time of electrode application number numerical control machine. More specifically, said conductive material dispersion shear viscous rate 3. 0Pa, s to 15Pa, implementation being s.

Said property characteristic method of configurating the conductive material such as conductive material dispersion, dispersion number and dispersion large types, properties can be implemented through the ratio of the number [...].

Further, carbon nanotubes of crystallinity with structure and form carbon nanotubes constituting units, said units consisting of 2 shaped s402. properties according to the structure of primary particles. the one or more other factors the number by the combination, carbon nanotubes can be according to properties required to have.

Specifically, in the embodiment according to conductive material dispersion in one of the present invention, a bundle-type carbon nanotubes comprise a conductive material.

Said carbon nanotubes may be assembled to the entire or partially bundle-shaped carbon nanotube units to the structure difference formed 2, said ends of the carbon nanotubes has a diameter graphite nano size units (graphite sheet), sp² Coupling structure. the graphite surface exhibits the properties of the conductor or semiconductor can be rolled up to the angle and structure. In accordance with the units making up the coupling wall carbon nanotubes (SWCNT, single a-walled carbon nanotube) single walled carbon nanotubes, double-walled carbon nanotubes to multi-walled carbon nanotube (MWCNT, multi-a walled carbon nanotube) classification (DWCNT, doublewalled carbon nanotube) and can be, thin wall thickness can comprise resistance is disclosed.

The conductive material of the present invention in one in the embodiment according to said dispersion, said single-walled carbon nanotubes, double-walled and multi-wall carbon nanotubes can be one or two or more units.

Also, the diameter of the carbon nanotubes as a conductive material for a secondary battery units is excessively large, in addition of pore diameter using an electrode layer is applied as can be. Also, the diameter of the carbon nanotube units too if it is less, dispersion is hard dispersion number tank pressure drop processability, carbon nano tube or space between the electrode active material particles dispersed carbon nanotube unit is embedded, a porosity sufficient to tame the tape. The, usable in the present invention carbon nanotubes can have a average strand diameter is 30 nm hereinafter units in carbon nanotubes, according to the diameter of the dispersion of conductive material is formed on an electrode resistance reducing effect number units when considered, said strand diameter is 10 nm to 20 nm average carbon nanotube unit implementation being.

Further, the length of carbon nanotubes units effect due to electrode of electrically conductive, strength and electrolyte keeping device can be improved. If the length of the electrically conductive carbon nanotubes form outputs a shorter efficiency units pass electrically conductive as a decrease in pressure is bigger disclosed. While, the length of carbon nanotubes units too long as a decrease in an acidic solution is bigger disclosed. The, usable in the present invention the length of the carbon nanotubes in units 1 micro m m to 200 micro implementation being. Also, the diameter of the units when considered carbon nanotubes, said carbon nanotubes units units (units of length of long axis through the center of) the length of carbon nanotubes on diameter (passed the center of the unit, the length of said major axis perpendicular shortened) ratio can have a defined aspect ratio is 5 to 50,000, more specifically 10 to implementation being 20,000.

In the present invention, carbon nanotube field emission scanning electron microscope for measuring diameter and length units of strands can.

On the other hand, said units including carbon nanotubes such as carbon nanotubes (TD) bulk density (BD) [...] (non-TD/BD) is 70 to 120 mm. on non-can be.

In the present invention, bulk density (BD) (TD) [...] on internal structure of carbon nanotubes from the ratio of can predict, TD/BD ratio in an excessively large content of portions of units can be turned into high and low since the capacity property, the TD/BD ratio too if it is less for dispersing carbon nanotubes is reduced equipment disclosed. According to a significant number of the pressing [...] effect so that when, in the present invention available TD/BD ratio more specifically 70 to 100 carbon nanotubes by means of implementation being. Further, in the present invention the meeting a TD/BD ratio available said [...] of carbon nanotubes under conditions 1800 kg/m³ To 2200 kg/m³ Implementation being.

Further, in the embodiment according to said conductive material dispersion in one of the present invention, said carbon nanotubes bulk density 10 kg/m³ To 50 kg/m³ Can be one having an. Said conductive carbon nanotubes by a range of bulk density and dispersibility can be improve.

In the present invention, bulk density of the carbon nanotubes are determined according to a mathematical equation 1 can be represented.

[Mathematical equation 1]

Bulk density (kg/m³ )=weight (kg)/carbon nanotube carbon nanotube volume (m³ )

Further, in the embodiment according to said conductive material dispersion in one of the present invention, the diameter of the aforementioned units said carbon nano tubes as small, TD/BD high BET counts the number of contact hole having a specific raised surface excellent dispersibility can exhibit. Specifically in the present invention said available a specific surface area of 180 m BET of carbon nanotubes² To 300 m/g² Can have a/g, more specifically 230 m² To 300 m/g² Implementation being/g. In the present invention, measured by BET method and a specific surface area of carbon nanotubes provided, specifically BEL Japan yarn BELSORP a-mino II liquid using a nitrogen temperatures (77K) in nitrogen gas can be calculated from the adsorption amount.

Further, in the embodiment according to said conductive material dispersion in one of the present invention, a laser with a wavelength 514 nm Raman spectroscopy using said carbon nanotubes obtained by means 1580 ± 50 cm^-1 G band in 1360 ± 50 cm for maximum peak intensity (IG)^-1 The ratio of the maximum peak intensity (ID) (ID/IG) D band in a predetermined first 0. 7 to 1. 2 be a melt viscosity of 0.1.

Raman such an assay method as analyzing the structure of carbon nanotubes, carbon nanotubes useful surface state analysis of method are disclosed. Raman spectrum of carbon nanotubes during frequency 1570 cm^-1 -1580 cm^-1 G band as a peak in the vicinity of the in areas which, this peak as representing the combination sp2 of carbon nanotubes, carbon crystal structure represented by the following free deficiency are disclosed. On the other hand, during Raman spectrum frequency 1350 cm^-1 -1360 cm^-1 As a band D and in areas in the vicinity of peak, this peak as representing the combination sp3 of carbon nanotubes, comprising coupling a combination sp3 sp2 shape semiconductors are increased when atomic bond. The D band is present in said carbon nanotubes to deficiency disorder (disorder) (defect), or amorphous is generated because the increased pressure when the, G band maximum peak intensity (ID) (ID/IG) for maximum peak intensity ratio of D band (IG) corresponding to the calculated degree of disorder (disorder) to deficiency can be quantitatively evaluating (defect).

In the present invention Raman spectrum for frequency band G 1580 ± 50 cm of carbon nanotubes^-1 Region, more specifically 1575 cm^-1 To 1600 cm^-1 Peak in areas may be, D band frequency 1360 ± 50 cm^-1 Region, more specifically 1340 cm^-1 To 1360 cm^-1 Be a peak in areas. Said G band and D band frequency range using Raman assays can be range-reflection is shifted along the UGT. In the present invention price but not one Raman using specially number, (Thermo Electron Scientific Instruments LLC) DXR Raman Microscope using 514 nm laser wavelength can be measured.

G band peak integration values D band peak integration value conventional large proportion its inner bad crystallinity of CNT solution containing amorphous carbon or convective means, in the present invention BET specific surface area increases and bundle structure 2 difference by the crystallinity of said database has a shape such as mean value of CNT is equal to ID/IG.

Further, said carbon nanotubes used in number Co trillion processes, Mo, V, or Cr catalyst or cocatalyst metal element such as derived from 50 ppm hereinafter, more specifically can be content of 5 ppm hereinafter. In this way, residual carbon nanotubes as metal content of impurities that by significantly reducing side reactions can be an electrode without any danger is excellent in conductivity. In the present invention, the content of residual carbon nanotubes gettering layer (inductively coupled plasma, ICP) can be analyzed using high frequency inductively coupled plasma. Further, Fe not comprising said carbon nanotubes may be filled.

Further, said carbon nanotubes having the good electrical conductivity, specifically when pressure 62 mpa, volume resistance 0. 01 Ω, cm hereinafter, more specifically 0. 0001 Ω, cm to 0. 009 Ω, be a melt viscosity of 0.1 cm.

In the present invention, volume resistivity of 1 mm diameter of carbon nanotubes comprises introducing the carbon nanotube in insulating fill 4 have outer surfaces of the pressurized gas from the current and voltage of probe measuring, by applying pressure when a volume resistivity value of 62 mpa correction coefficient was calculated.

Said carbon nanotubes such as commercially available may be used, directly or number used high pressure liquid coolant may be filled. Number when high pressure liquid coolant, arc discharge method, laser evaporation or chemical vapor deposition method can be bath using normal of number, the type of the catalyst bath process number, number of special properties such as heat treatment and impurities can be [...] number through implementing said method.

Specifically, chemical vapor phase synthesis when number along high pressure liquid coolant, said carbon nanotubes loaded spherical α - alumina support metal catalyst supported carbon source contacting step number tank under heated carbon nanotubes, carbon nanotubes and optionally the number by number metal impurities selectively in a stand-alone tank including manufacturing method can be disclosed.

Said chemical vapor phase synthesis according to the number of carbon nanotubes sol, more specifically said horizontal supported or fluidized bed reactor is charged into a fixed bed reactor, said vapor carbon source at a temperature of melting point of metal catalyst supported said pyrolysis temperature hereinafter more carbon source; or said carbon source and a reducing gas (such as hydrogen for example) and a carrier gas (e.g. nitrogen) injection of a gas mixture of carbon source chemical vapor synthetic MethodsIn acid can be bound to the carbon nanotube. Said number of carbon nanotubes by chemical vapor phase synthesis such as growth direction is substantially parallel shaft bath tube, tube longitudinal direction of higher crystalline graphite structure. As a result, the diameter of the small units, electrically conductive and strength higher.

Further, said number of carbon nanotubes are specifically directed at temperatures less than 500 °C or more sol 800 °C, more specifically 550 °C to 700 °C can be performed. In the area where said reaction temperature of amorphous carbon generated while minimizing weight through the inside of a bulk of carbon nanotubes while maintaining plural, dispersibility according to bulk density can be further enhanced. As the induction heating (induction heating) process for said heat, radiant heat, laser, IR, microwave, plasma, such as surface plasmon heating can be used.

Also, it can be said carbon source supplying carbon, can be present in a vapor at a temperature of 300 °C grudge without special number if available disclosed. Specifically carbon carbon-based compound may be 6 hereinafter, more particularly enemy [u carbon monoxide, methane, ethyl, ethylene, ethanol, acetylene, propane, propylene, butane, butadiene, pentane, pentene, 1 petroleum cracking process, hexane, cyclohexane, benzene or toluene can be as to the, which of these one or more mixtures can be.

Such as by heat treatment after said carbon nanotubes, carbon nanotubes array of regularly than for aligning the cooling process is optionally can be performed. Said cooling step is specifically of a heat source such as refrigerator or cooling can be performed using natural number according to the wetting ability.

On the other hand, said number of conductive material of the bath used supported catalysts comprise a, spherical α - alumina support metal catalyst are supported in body are disclosed.

Α - are very low compared to the alumina catalyst support when the slide as porous alumina γ - very low disclosed. However, the catalyst is formed by number melts prior to the melting, when synthesizing carbon nanotubes using the same number of amorphous carbon can be billion while reducing diameter increases and specific surface area. Simultaneously improve the dispersion can be reduce the bulk density of carbon nanotubes can be.

Specifically in the present invention usable as an average particle diameter of alumina support said α - (D₅₀ ) Is 20 to 200 micro m and micro m, 1 m² To 50 m/g² Having BET/g of specific surface be a. In addition, smoother surface that very low pore alumina said α - also, specifically 0. 001 cm³ /G to 0. 1 cm³ Having pores of/g be a degree.

On the other hand, said support body including said supported catalysts comprise a spherical of α - alumina, α - alumina support of metal catalyst after firing of said spherical tank containing number can be disclosed. Specifically, said supported catalysts comprise said metal catalyst precursor of metal catalyst precursor solution by dissolving a number at a high pressure liquid coolant, said spherical α - alumina support added after mixing, 700 °C hereinafter by calcined at temperatures can be performed.

Said support on which a metal catalyst vapor carbon source present carbon components in combination an annular structure 6 could be bonded each other to keep running. Said metal catalyst iron, nickel or cobalt such as week catalyst may be used alone, or said week catalyst molybdenum, vanadium or chromium and carbon-composite catalyst used in form of a cocatalyst - cocatalyst with disapproval. Specifically said composite catalyst FeCO, CoMo, CoV, FeCoMo, FeMoV, may be FeCoMoV FeV or like, which of these one or more mixtures can be. Further, said promoter may be carbon-1 mol 0. 01 about 1 mole, more specifically 0. 05 about 0. 5 mole is used in a quantity of disapproval.

Number of supported catalyst in said bath, said metal salt or metal oxide is used as the metal catalyst precursor include water soluble can be, specifically, Fe, Ni, Co, Mo, V, wherein a group 13 metal including metal salt selected from the one or more Cr and heavy, be a metal oxide or metal halide. More specifically Fe (NO₃ )₂ , 9H₂ O, Co (NO₃ )₂ , 6H₂ O, Co₂ (CO)₈ , [Co₂ (CO)₆ (T provided BuC=CH)], Cu (OAc)₂ , Ni (NO₃ )₂ , 6H₂ O, (NH₄ )₆ Mo₇ O₂₄ , 4H₂ O, Mo (CO)₆ , (NH₄ ) MoS₄ And NH₄ VO₃ Selected from the group consisting of a mixture of one or more can be used.

Further, said precursors of the metal catalyst can be used as a an aqueous solution dissolving in water, , the metal of the catalyst precursor concentration aqueous solution impregnated efficiencies can be appropriately controlled. Specifically, the concentration of the metal catalyst precursor aqueous solution 0. 0 to 1 g/ml. Implementation being 6 g/ml.

Further, the final content of said metal catalyst precursor to be mixed with said spherical α - alumina support in support of the support number tank can be determined content of the colony.

Further, the bulk density of the carbon nanotubes [...] number said metal catalyst precursor solution can be further used selectively addition and mixing of a support-hydroxy acids. The acid added by said metal catalyst precursor solutions may also include acid 1 mol metal catalyst 3 when about 40 mole, more specifically 5 corresponding to about 30 mole content can be used. Said acid such as citric acid may be specifically, which of these one or more mixtures can be.

On the other hand, said spherical α - said metal catalyst precursor solution mixing process can be performed according to a conventional method of alumina support, specifically 45 °C to 100 °C to deflocculate the stock rotating or temperature and can be performed.

Further, the support on which the final number when incorporated in said tank by considering content of metal catalyst can be mixing metal catalyst precursor and a support. Amount of metal catalyst in the supported catalyst formed by, using number of carbon nano tube supported tank ix. bulk density increases. The number of carbon nano tube bath by considering the bulk density, the final number 5 to 30% by weight relative to the total weight % of a metal catalyst tank supported catalyst can be supported in an amount of mixing can.

Further, said metal catalyst precursor solution after mixing alumina support said spherical α -, optionally can be performed by a drying operation so as to prior. Said drying process can be performed according to a conventional method, specifically 40 °C under vacuum at a temperature range from 1 to 100 °C 3 rotation time performed by evaporating disapproval.

Then, the metal catalyst precursor and support said ready method carried out of baking in a mixture. Said plastic is 700 °C hereinafter, specifically at a temperature of 400 °C to 700 °C can be conducted in air or inert atmosphere.

Further, after said drying, by a pre-firing process at a temperature of 250 °C to 400 °C before and optionally can be performed.

The, reaction efficiency when considered immediately before said pre-firing, said metal catalyst precursor and support said α - alumina support using a maximum 50% is impregnated with a mixture, said mixture is impregnated alumina support can be said α - 2VM said pre-firing immediately after use.

On the other hand, in the embodiment according to manufacturing method of conductive material in one of the present invention, said number of special cleaning process metal impurities, such as pure can be performed according to a usual method.

Said manufacturing method such as morning fair number prepared by the bundle type carbon nanotubes according number can be conductivity and excellent conductive liquid. The purity, the cell height within the conductivity cell performance when applied, in particular battery capable of output characteristics are improved.

On the other hand, in the embodiment according to conductive material dispersion in one of the present invention, said dispersion number is either partial or hydrogenation nitrile rubber may be, specifically consiting of repeating units derived from, hydrogenated consiting of repeating units derived from and α, β - unsaturated nitriles derived structure be a repeating units of including hydrogenated nitrile rubber. the hydrogenated nitrile-based rubber can optionally additional comonomers copolymerizable.

Said hydrogenated nitrile rubber specifically α, β - unsaturated nitriles, conjugated diene and optionally other copolymerizable comonomers after copolymer, copolymer C=C double bond by hydrogenation in number bath 1308. the polymerization process and hydrogenation process can be performed according to a conventional method.

Said hydrogenated nitrile rubber available morning fair number of α, β - unsaturated nitriles include specifically as to the acrylonitrile or methacrylonitrile and, among these 1 species alone or can be mixtures of 2 or more.

Further, said hydrogenated nitrile rubber morning fair number of available 1, 3 - butadiene consiting include specifically, isoprene, 2, 3 - and 4 ∼ 6 carbon atoms such as methyl father hit d en consiting of cited, which of these one or more mixtures can be.

Also, other copolymerizable comonomer include specifically available selectively said aromatic vinyl monomer (e.g., styrene, α - methylstyrene, vinylpyridine, fluoroethyl vinyl ether or the like), α, β - unsaturated carboxylic acid (e.g., acrylic acid, methacrylic acid, maleic acid, fumaric acid, or the like), α, β - unsaturated carboxylic acid ester or amide (for example, methyl (meth) acrylate, ethyl (meth) acrylate, n - crystalline salts of dodecyl (meth) acrylate, methoxymethyl (meth) acrylate, hydroxyethyl (meth) acrylate, such as (meth) acrylate or polyethylene glycol), α, β - unsaturated dicarboxylic acid anhydride (for example, maleic anhydride, itaconic anhydride, citraconic anhydride such as sheet) but is cited, limited to are not correct.

Said method such as number prepared by the hydrogenated nitrile rubber in accordance, α, β - of repeating units derived from unsaturated nitriles, derived consiting of a repeating structure, hydrogenated consiting derived structure unit and selectively other copolymerizable comonomer can be of a wide range of repeating units derived from non-content in various angular positions, in each case said total sum is 100% by weight of structural units is under or over.

Specifically, decentralized improvement and dispersion medium when considered functionalisation with carbon nanotubes, said hydrogenated nitrile rubber rubber total relative to the weight of said α, β - (repeating unit) 10% by weight to 60% by weight of repeating units derived from the unsaturated nitriles, 20 weight % to 60 weight % can be specifically comprising. Said tolerable range α, β - unsaturated nitriles structure when containing the repeating unit comprising, for dispersing carbon nanotubes can be enhanced, even if the quantity of addition of carbon nanotubes can be impart high conductivity.

In the present invention, hydrogenated nitrile-based rubber α, β - of the content of repeating units derived from unsaturated nitriles, α, β - in a proportion by weight of the repeat units derived from unsaturated nitriles of rubber is automatically, measurements of the content, in accordance with JIS K 6364 mill of oven method, nitrogen ions generated from X amount measuring molecular weight of acrylonitrile, quantitative degree of validity of median are disclosed.

Further, said hydrogenated nitrile rubber rubber by weight relative to the total weight % to 15% by weight of repeating units derived from said hydrogenated consiting 1, 5% by weight to 15% by weight of content can be more specifically. Said range when a content comprising, for emulsion wherein dental care compositions can be enhanced for dispersing carbon nanotubes increased.

Further, said hydrogenated nitrile rubber is added to other copolymerizable comonomers when further includes, but may vary according to the nature content types and comonomer ratio, specifically said comonomer repeating units derived from the content of hydrogenated nitrile rubber of 20 relative to the total weight % hereinafter, 1 weight % to 10 weight % more specifically implementation being.

More specifically, said hydrogenated nitrile rubber of acrylonitrile derived structure represented recurring structural units of the formula 1, formula 2 and formula 3 of hydrogenated butadiene to repeating units derived from butadiene to of of acrylonitrile - butadiene rubber (H-a NBR) derived from repeating units of structure including implementation being. The, formula 1 to 60% by weight to 10% by weight of the content of structural units derived from acrylonitrile, 20 weight % to 60 weight % more specifically implementation being. Further, the content of structural units derived from 1 to 15% by weight of hydrogenated butadiene to formula 3% by weight, 5% by weight to 15% by weight more specifically implementation being.

[Formula 1]

[Formula 2]

[Formula 3]

Further, said hydrogenated nitrile rubber has a weight average molecular weight of 700, 000g/mol to 10, 000g/mol, more specifically 10, 000g/mol be a melt viscosity of 0.1 to 300, 000g/mol. Further, said hydrogenated nitrile-based rubber 2. 0 to 6. 0 range, specifically 2. 0 to 4. 0 range of polydispersity index PDI (Mw/Mn ratio, has a weight average molecular weight by number average molecular weights Mn and Mw) can be and have. Said hydrogenated nitrile rubber is a weight average molecular weight range of said when the polydispersity index, can be evenly distribute dispersant of carbon black. In the present invention, weight average molecular weight of said hydrogenated nitrile rubber and a number average molecular weight (GPC) molecular weight in terms of polystyrene by gel permeation type chromatography is analyzed to are disclosed.

On the other hand, in the embodiment according to said conductive material dispersion in one of the present invention, dimethyl formamide (DMF) said dispersing medium, diethyl formamide, dimethylacetamide (DMAc), N - methyl pyrrolidone (NMP) such as amide-based polar organic solvent; methanol, ethanol, 1 - propanol, 2 - propanol (isopropyl alcohol), 1 - butanol (n - butanol), 2 - methyl - 1 - propanol (ISO butanol), 2 - butanol (sec - butanol), 1 - methyl - 2 - propanol (tert - butanol), rearranged pentanols, process play, such as octanol or octanols alcohols; ethylene glycol, percutaneous, TEG, propylene glycol, 1, 3 - propanediol, 1, 3 - butanediol, 1, 5 - pentanediol, or glycols such as [heyk thread [leyn glycol; glycerin, trimethylolpropane tri, pentaerythritol, polyhydric alcohols such as sorbitol; novel call mono methyl ether ethylene, d ethylene glycol mono methyl ether, ethylene glycol monomethyl ether, tetra ethylene glycol monomethyl ether, ethylene glycol mono ethyl ether, d ethylene glycol mono ethyl ether, ethylene glycol ethyl ether, tetra ethylene glycol mono ethyl ether, ethylene glycol monobutyl ether, d ethylene glycol mono butyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether or tetrahydrofurfuryl alcohol such as glycol ethers; acetone, methyl ethyl ketone, methyl propyl ketone, cyclopentanone in parallel such as ketones; acetic acid ethyl, γ - butyl lactone, and ε - propionic acid lactone such as esters can be as to the, which of these one or more mixtures can be. More specifically, said carbon nanotube and dispersion number when said dispersing medium amide-based decentralized to account for the effects improvement be a polar organic solvent.

Such as in the embodiment according to said conductive material in one of the present invention imaging system with said dispersion, said dispersion number, carbon black and large content is distributed according to a dispersion can be properly determined.

Specifically, homogeneous dispersion of carbon nanotubes dispersed in said dispersion for number 1 to 50 parts by weight of 100 parts by weight parts by weight of carbon nanotubes, more specifically 10 parts by weight to 50 parts by weight can be. 1 parts by weight of dispersion number content of homogeneous dispersion of carbon nanotubes has a small dispersion is below, exceeds 50 parts by weight of dispersion viscosity increase danger of deterioration of workability to flow tides.

Further, 1 to 30% by weight relative to the weight of said carbon nanotubes total dispersion conductive material % by weight, 1% by weight to 5% by weight more specifically can be included. An electro-conductive when said board is independent range of content can exhibit good balance and dispersibility. If less than 1% by weight when said through a content of carbon nanotubes, in one embodiment of lithium secondary battery electrode for electrode formation including the morning fair number number machie of quantity of composition and, as a result within the void increases and, established carbonate capacity lithium secondary battery charging rate may cause a decrease in disclosed. Further, for a horizontal drying time can be every other machie of number number. Further, carbon nanotubes exceeds the content of 30% by weight, of carbon black mixed is reduced equipment disclosed.

More specifically, in the embodiment according to said one conductive material of the present invention said number 1 to 50 parts by weight of 100 parts by weight of said carbon nanotubes dispersed dispersions parts by weight, and 200 parts by weight to parts by weight of said dispersion medium can be 9900. Carbon nanotubes can be evenly distribute emulsion wherein said range. When included with the mixing ratio, than can exhibit improved effectiveness.

Further, in the embodiment according to said conductive material dispersion dispersion stability of the present invention and optionally one further comprises stabilizing number can be.

The surface of carbon black dispersion stabilizing said number is surrounding the carbon nanotubes can be to prevent agglomeration of the carbon nanotubes by wrapping effect. the dispersion stabilizing number include excellent affinity for carbon nanotubes, number and preferably for miscible emulsion wherein can be dispersed.

Specifically, in the embodiment according to said conductive material dispersion in one of the present invention, said dispersion stabilizing number is polyvinylidene fluoride, can be fluoropolymers such as polyvinyl pyrrolidone, which of these one or more mixtures can be.

Further, one having a weight average molecular weight to number is said dispersion stabilizing 5,000,000g/mol can be 20, 000g/mol. Dispersion stabilizing number molecular weight of less than 20, 000g/mol too if it is less, sufficient carbon nanotubes lapping effect difficult, the molecular weight of an excessively large number of dispersing stabilizing 5,000,000g/mol above the dispersion medium to molecules of degradation, carbon nanotubes sufficiently wrapping which are otherwise difficult disclosed. More specifically said number is one having a weight average molecular weight can be distributed stabilizing 70, 000g/mol to 2,000,000g/mol.

Further, 100 parts by weight of said dispersion stabilizing number 1 parts by weight to 10 parts by weight of carbon nanotubes can be used. If too low content of content of carbon nanotubes compared to dispersion stabilizing number, to the number of copied lapping sufficient and, as a result carbon nanotubes in which the coagulation equipment disclosed.

Said conductive material dispersion of the present invention such as one in the embodiment according to the O, bundle-type carbon nanotubes including conductive material, dispersion number after mixing a dispersion medium and, when the measured frequency is 1Hz rheometer (|G *|@ 1Hz) complex modulus 20Pa 500Pa to step number by including manufacturing method is milled to bath 1308. The same conductive material including carbon nanotubes and, dispersion number are the same as described prior is used in an amount types and large and dispersed.

Said conductive material, can be performed according to a conventional method number dispersion mixing large and dispersed. Specifically carbon nanotube dispersion formed by groove, or dispersion medium cavitation distributed processing is performed in order to enhance dispersibility of carbon nanotubes disapproval. Upon applying a high cavitation distributed processing when said liquid water caused by disruption of the vacuum bubbles generated as a shock wave plasma method, said method without damaging the properties of carbon nanotubes can be dispersed. Specifically said ultrasound cavitation distributed processing, sheet mill number, or shear dispersibility can be performed by processing.

Said distributed processing process depending on the type of number and amount of the dispersed carbon nanotubes can be perform. Specifically when ultrasonic processing, frequency 10kHz to 150kHz and have, the amplitude 5 micro m to 100 micro m and have, the irradiation time can be 1 to about 300 minutes. Said ultrasonic generator device for ultrasonic drying gas as, ultrasound can be using a homogenizer. Also, when sheet mill processing number, and can have the pressure 20 mpa to 250 mpa, 1 or more times, specifically 2 can be performed a plurality of times or more times. Further, sheet mill dispersion device include using a high-pressure wet sheet mill can be said number number.

Said cavitation distributed processing process particularly temperature but not limited to, large dispersion of retentate dispersion can be carried out in corresponding temperature changes. Specifically 50 °C hereinafter, more specifically can be carried out at a temperature of 15 °C to 50 °C.

Further, in the embodiment according to conductive material dispersion in number one of the bath of the present invention, milling is ball mill (ball mill), bead mill (bead mill), or can be performed by a method such as basket mill (basket mill), more specifically bead Fe method can be performed by a milling cutter. The amount and the size of the bead mill type of conductive material, and can be appropriately determined depending on the type of the dispersion number, specifically said mean average diameter of the bead mill 0. Implementation being 2 mm to 5 mm.

Said milling process is complex elastic modulus is not conductive material dispersion can be performed under conditions that meet said conditions, specifically 90 to about 120 minutes can be performed.

Further, said dispersion dispersion stabilizing number morning fair number can be further used selectively, said dispersion stabilizing number is the normal number of said dispersion mixing process can be added. In this case one in the embodiment according to manufacturing method of the present invention added process that conductive material dispersion stabilizing number can be distributed. Is used in an amount and type of said dispersion stabilizing number are the same as described before.

Said manufacturing method such as dispersant of uniform carbon nanotubes dispersed dispersion number bath according can be disclosed.

Specifically, in the embodiment according to said conductive material dispersion in one of the present invention, carbon nanotube dispersion is said number, number of carbon nanotubes is dispersed physical or chemical bonding surface in the form of composite comprising carbon nanotubes dispersed - dispersion are introduced through number can be.

More specifically, particle size distribution of said conductive material in said composite dispersion D₉₉ Is 50 micro m hereinafter, more specifically 20 micro m to 50 micro m can exhibit in distribution.

Said composite particle size distribution D₉₉ Reference in particle diameter of 99% particle diameter distribution can be defined. the composite characterized D₉₉ Is e.g., laser (laser diffraction method) for measuring the diffraction law can, more specifically, said composite solvent residue, a laser diffraction particle size measuring device commercially available (e.g. Microtrac MT 3000) is introduced into the chamber to form a 60 W output after about 28kHz ultrasonic, particle diameter distribution measuring device of reference in 99% in average particle diameter (D₉₉ ) Can be calculated.

Further, one in the embodiment according to said conductive material dispersion of the present invention in the content of solids relative to the total dispersion including said complex 1. 0 to 5% by weight. 0 implementation being % by weight. The conductive material of the present invention is higher than the one in the embodiment according to conventional dispersion solids content can exhibit excellent dispersibility in spite conductive material.

The present invention according to the homogeneous dispersion of carbon nanotubes made of electrically conductive material dispersion, thermal, mechanical properties may be, improving workability in practical applications in various fields and low viscosity constant in addition permits. Specifically said conductive material dispersion of the bath of the electrode number can be used.

In the embodiment of the present invention the according to one another, with said electrode with bow material including a conductive material dispersion composition for forming electrode for secondary battery using the electrode prepared by the number number [...] substrate.

Said composition for electrode formation, anode or cathode electrode can be used in conventional bow material as a secondary battery.

Specifically for forming composition for electrode formation when said anode, said reversible intercalation and [...] electrode active material capable of imparting a compound capable as (in mote is secure intercalation compounds), specifically cobalt, manganese, nickel or a transition metal such as aluminum including lithium transition metal oxide positive electrode active material for lithium be it will be a quality.

More specifically, the anode lithium - said manganese-based oxide (for example, LiMnO₂ , LiMn₂ OOr the like), lithium - cobalt oxide (e.g., LiCoO₂ Or the like), lithium - nickel oxide (for example, LiNiO₂ Or the like), lithium - nickel - manganese oxide (for example, LiNi_1-Y Mn_Y O₂ (Here, Y<<0 1), LiMn_2-z Ni_z O₄ (Here, Z they 0 they 2) or the like), lithium - nickel - cobalt oxide (for example, LiNi_1-Y Co_Y O₂ (Here, Y<<0 1) or the like), lithium - manganese - cobalt oxide (for example, LiCo_{1 a-Y} Mn_Y O₂ (Here, Y<<0 1), LiMn_2-z Co_z O₄ (Here, Z they 0 they 2) or the like), lithium - nickel - manganese - cobalt oxide (for example, Li (Ni_P Co_Q Mn_R ) O₂ (Here, 0 1, 0 1, 0 1 R Q P they audena audena audena audena audena, P + Q + R=1) or Li (Ni_P Co_Q Mn_R ) O₄ (Here, P Q 2, 0 0 2 R 2, 0 they audena audena audena audena audena, P + Q + R=2) or the like), or lithium - cobalt - nickel - transition metal (M) oxide (for example, Li (Ni_P Co_Q Mn_R M_S ) O₂ (Here, M is Al, Fe, V, Cr, Ti, Ta, Mg and Mo from the group consisting of selected, P, Q, R and S is used in elements of atomic fraction as, 0 they P 1, 0 1, 0 1, 0 1 Q they R they S they audena audena audena audena, is P + Q + R + S=1) or the like) or the like is cited. Further, said lithium transition metal oxide is tungsten (W) may be doped by may be filled. Even capacity characteristics and thermal conductive material that are double the anode said LiCoO₂ , LiMnO₂ , LiNiO₂ , Lithium nickel manganese cobalt oxide (for example, Li (Ni_{0. 6} Mn_{0. 2} Co_{0. 2} ) O₂ ,LiNi_{0. 5} Mn_{0. 3} Co_{0. 2} O₂ , Or LiNi_{0. 8} Mn_{0. 1} Co_{0. 1} O₂ Or the like), or lithium nickel cobalt aluminum oxide (for example, LiNi_{0. 8} Co_{0. 15} Al_{0. 05} O₂ Or the like) and the like disclosed. Double capacity characteristics and thermal conductive material that are LiNi said even as the anode_{0. 6} Mn_{0. 2} Co_{0. 2} O₂ ,LiNi_{0. 5} Mn_{0. 3} Co_{0. 2} O₂ , LiNi_{0. 7} Mn_{0. 15} Co_{0. 15} O₂ Or LiNi_{0. 8} Mn_{0. 1} Co_{0. 1} O₂ May be like, which of these one or more mixtures can be.

Further, when adhesive for forming said cathode electrode, said electrode active material capable of imparting a compound capable reversible intercalation and [...] as, artificial graphite, natural graphite, graphite carbon fiber, amorphous carbon such as carbonaceous material; Si, Al, Sn, Pb, Zn, Bi, In, Mg, Ga, Cd, Si alloy, which can be the metallic compounds such as Al alloyable with lithium alloy or Sn alloy; SiO_x (0 < x < 2), SnO₂ , Vanadium oxide, lithium vanadium oxide also the mask will do the [phu dope and lithium metal oxide; or Si-a C complex or metallic compound such as Sn-a C composite including said carbonaceous material and it will be a bow material such as composite cathode, which of these one or more mixtures can be. In addition, said cathodic active lithium thin film can be used disapproval. Further, carbon material is carbon and that decision crystallinity can be formed on the carbon or the like. (Soft carbon) and cured carbon (hard carbon) is representative and that crystallinity carbon include softening carbon, high crystalline carbon include amorphous, plate, scale-like, spherical or fiber type of natural graphite or artificial graphite, height hour graphite (Kish graphite), and economic (pyrolytic carbon), liquid crystal pitch orgin carbon fiber (mesophase pitch based carbon fiber), carbon microspheres (meso-a carbon microbeads), liquid crystal pitch (Mesophase pitches) and petroleum and coal-based carbon hot calcined coke (petroleum or coal tar pitch derived cokes) such as representative of the pipe.

Said electrode bow material relative to the total weight % based on the solids content composition for forming electrode 70 to 99. 5% by weight can be included. Electrode active material content is below 70% by weight and a danger of term reliability, 99. 5% by weight binder and conductive material exceeds the relative content of electrode current collector lowering adhesion, a danger of deterioration of the conductive flow tides.

Further, attachment and electrode active material between said electrode active material composition comprises particles for electrode formation for binder can be used in further comprises a current collector.

Specifically poly vinyl the flow which is burnt the id said binder (PVDF), vinylidene fluoride - hexafluoropropylene copolymer (PVDF-a co non-HFP), polyvinyl alcohol, polyacrylonitrile (polyacrylonitrile), carboxylic [...] (CMC), starch, hydroxy pro will bloom and with the rule which it will count woods, reproducing cellulose, polyvinyl pyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene - propylene - diene polymer (EPDM), sulfonated - EPDM, styrene butadiene rubber (SBR), fluorine rubber, or various methods of polymer or copolymer which is cited, among these 1 species alone or in combination with at least one 2 can be mixtures. 1% by weight to 30% by weight relative to the weight of the total composition said binder for electrode formation can be included.

Further, said electrode composition for forming said electrode active material, such as binder further comprises apparatus for mixing and dispersing solvents for the can.

Said solvent may be a solvent commonly used in the art, dimethyl the bombing death id which it will count (dimethyl sulfoxide, DMSO), isopropyl alcohol (isopropyl alcohol), N - methylpyrrolidone (NMP), acetone (acetone) or water can be as to the, among these 1 species alone or in combination with at least one 2 can be mixtures. Said solvent is used in an amount of slurry coated thickness, taking into account said electrode active material and dissolve a binder or dispersing crude yield number, then electrode for applying shear viscosity number jaws may indicate the thickness uniformity across the positive drawing so as to have sufficient disclosed.

On the other hand, number one in the embodiment according to the bath of the present invention to said electrode composition for the electrode, may be anode or cathode, more specifically can be an anode.

Said electrode is said electrode composition for the electrode active material layer is formed according to conventional method number and number [...] 1308. bath. Specifically, said electrode is said collector electrode composition for applying dry or, or said composition for electrode formation of cast onto a support and then, on a current collector film is separated from the support obtained by lamination number bath 1308.

Said collector cell without chemical change have specially if the number one has the conductive, e.g. copper, stainless steel, aluminum, nickel, titanium, or stainless steel surface plastic carbon or aluminum carbon, nickel, titanium, surface treatment like the like can be used. Further, current collector has a thickness of typically 3 to 500 micro m said micro m may have, said force positive active material formed on a fine concavoconvex electrolyte may be filled. E.g. film, sheet, foil, net, porous, foam, such as a nonwoven fabric can be used in various forms.

In the embodiment of the present invention according to one another, said electrode electrochemical device including ball number is encoded. Said electrochemical element specifically cell, capacitors and the like may be, more specifically be a lithium secondary battery.

Specifically lithium secondary battery said anode, said anode disposed between a cathode, an anode and a cathode and an electrolyte interposed between said separator and, said conductive material including at least one of said positive and negative dispersion composition is prepared by the number can be for electrode formation. Further, lithium secondary battery has said said anode, cathode, separator electrode assembly for receiving the electronic device, and said electronic device a seal member can be optionally.

On the other hand, said lithium secondary battery wherein the, number of lithium ions to the anode and a cathode separator separating [...] transfer path, if the speed of the conventional lithium secondary battery used and grudge without special number available, in particular electrolyte ion migration resistance has an electrolyte preferably mung beans is excellent in the ability. Specifically porous polymer film, e.g. ethylene homopolymers, propylene homopolymer, ethylene/butene copolymers, ethylene/hexene copolymer and ethylene/methacrylate copolymers such as polyolefin polymer or porous polymer film 2 at least one layer of the laminated structure is used number high pressure liquid coolant can be. The conventional porous nonwoven fabric, e.g. high melting glass fiber, non-woven fabric can be used polyethylene terephthalate fibers disapproval. Further, heat resistance and mechanical strength ceramic component or polymer material securing comprising coated separator may be used, optionally can be used as single or multi-layer structure.

Further, in the present invention include lithium secondary battery electrolyte used morning fair number available organic liquid electrolyte, inorganic liquid electrolyte, solid polymer electrolyte, gel-type polymer electrolyte, solid inorganic electrolyte, as to the melt-type inorganic electrolyte can be, and not limited to them.

Specifically, said electrolyte and a lithium salt in an organic solvent can be.

Involved in the electrochemical reaction of said organic solvent medium can move the ions can be grudge without special number serves if can be used. Specifically said organic solvent, methyl acetate (methyl acetate), ethyl acetate (ethyl acetate), γ - butyrolactone (γ-a butyrolactone), polycaprolactone (ε-a caprolactone) ε - such as ester solvent; 2 draw [phyu column such as ether-based solvent (tetrahydrofuran) or dibutyl ether (dibutyl ether); ketone-based solvent such as cyclohexanone (cyclohexanone); (benzene) benzene, fluorobenzene (fluorobenzene) such as aromatic hydrocarbon solvent; (dimethylcarbonate, DMC) purification of dimethyl, the d ethyl car this [thu which it sees (diethylcarbonate, DEC), the ethyl car this [thu which it sees (methylethylcarbonate, MEC) methyl, ethyl the methyl car this [thu which it sees (ethylmethylcarbonate, EMC), purification (ethylene carbonate, EC), propylene carbonate (propylene carbonate, PC) such as carbonate-based solvent; ethyl alcohol, alcohol-based solvent such as isopropyl alcohol; R a-CN(R is C2 to C20 linear, branched or ring structure hydrocarbon group, an aromatic ring double bonds can be bond or ether) such as nitrile current; amides such as dimethyl formamide; d jade brush turbulent flow such as 1, 3 - dioxolane; or sulfonyl cancer (sulfolane) or the like can be used. Even carbonate-based solvent is preferably double, such a charge of lower error of gas and having ion conductivity (for example, purification of propylene carbonate or the like) with a cyclic carbonate, linear carbonate-based compound (for example, ethyl the methyl car this [thu which it sees, such as purification of the d ethyl car this [thu which it sees or dimethyl) viscosity mixture of more preferably disclosed. In this case about 1:1 to about 1:9 annular carbonate carbonate solvent is mixed at a volumetric ratio of the excellent performance of electrolyte can be appears.

Said lithium salt used in lithium secondary battery [...] grudge without special number if the number compounds capable of lithium ions can be used. Specifically said lithium salt, LiPF₆ , LiClO₄ , LiAsF₆ , LiBF₄ , LiSbF₆ , LiAl0₄ , LiAlCl₄ , LiCF₃ SO₃ , LiC₄ F₉ SO₃ , LiN (C₂ F₅ SO₃ )₂ , LiN (C₂ F₅ SO₂ )₂ , LiN (CF₃ SO₂ )₂ . LiCl, LiI, or LiB (C₂ O₄ )₂ Can be is used as the alkali. Said lithium salt concentration 0. 1M to 2. 0M range in use now. Are included in said range of lithium salt concentration, electrolyte conductivity and viscosity that is suitable in the periphery of the electrolyte may be excellent performance, lithium ions can be effectively.

Said electrolyte is said electrolyte components improves the characteristic of PVDF and in addition, battery charging billion number, cell discharge capacity enhancement to the like e.g., halo such as difluoro purification of compounds the alkyl [leyn the car sees [thu orgin, pyridine, tri-ethyl phosphite, high pressure, cyclic ether, ethylenediamine, n - glymes (glyme), process n-alkyl thiophosphoric triamides, nitrobenzene derivatives, sulfur, quinone imine dyes, N - substituted oxazolidinone, N, N - substituted imidazolidine, ethylene glycol dialkyl ether, ammonium salts, pyrrole, 2 - methoxy ethanol or three ammoniums such as aluminum may be filled only addition of at least one number is 1. The number said electrolyte is added relative to the total 0. 1% by weight to 5% by weight can be included.

The present invention according to such as said conductive material dispersion of conductive material including electrode prepared by the number using lithium secondary battery has an electrode for homogeneous dispersion due to an excellent discharge capacity, capacity retention stably output characteristic and can exhibit. As a result, portable phone, notebook computer, portable digital cameras, such as electric vehicle and hybrid electric vehicle (hybrid electric vehicle, HEV) inner neoplasias.

The, other according to an exemplary embodiment of the present invention, lithium secondary battery cells including battery pack including battery module and said ball number encoded units.

Said battery module or battery pack is power tool (Power Tool); electric vehicle (Electric Vehicle, EV), hybrid electric vehicle, and a plug-in hybrid electric vehicle (Plug provided in Hybrid Electric Vehicle, PHEV) including an armature; or power storage systems using one or more collected device power can be.

Hereinafter, the present invention is embodiment of the present invention in the embodiment for the person with skill in the art is provided for in the art hereinafter to be detailed as follows. However the present invention refers to several different taught herein can be embodied in the form of a in the embodiment is not limited to.

[Number attainments 1: number of carbon nanotube bath]

On Co Co as precursor of V (NO₃ )₂ , 6H₂ O and NH₄ VO₃ (Co/V, molar ratio 10:1) 2,000 ml water to prepare a clear aqueous solution cap A was obtained cutting 2,424 g. The separately, aluminum-based support as precursors to aluminum hydroxide (Al (OH)₃ ) In a α - 1 4 500 °C a time difference obtained by firing a cap B was prepared 2,000 g alumina support. Said α - alumina support reference urged 2,000 g, 100 and in terms of a mole, said alumina support 100 mol, Co/V (molar ratio 10:1) is 30 to cap B A solution to some excellent 4, 424g chasing said cap.

23 citric acid is added to 1 mol Co chasing behind citric acid, the resulting mixture of weighing, yes pie [thu catalyst metal precursor for 5 minutes with respect to the agitating sufficiently carrying 60 °C thermostat in aging. Rotating said mixture while maintaining temperature aged 80 rpm vacuum drying, after drying is accomplished through weighing moisture number [...] were measured (after drying weight: about 14. 1% by weight). The resulting dry reactants in time 2 4 700 °C supported his number 1 by high pressure liquid coolant.

High pressure liquid coolant in said number for carbon nano tube supported catalyst for fixed bed reactor using laboratory scale in conducting carbon nano tube. Specifically in a 55 mm diameter tube supported catalyst for said number prepared by the carbon nano tube is mounted on the central portion of quartz tube under nitrogen atmosphere to the organic material and the second electrode 670 °C temperature, nitrogen and hydrogen, and ethylene gas mixing volume ratio 1:1:1 ratio 1 to 180 ml/min time same as flowing reacting bundle type CNT and copiers.

[In the embodiment 1: Conductive material Dispersion number bath]

N - methylpyrrolidone (NMP) solvent 97. 6 parts by weight of bundle type CNT 2 parts by weight of hydrogenated acrylonitrile rubber father hit diene orgin (average strand diameter=15 nm) and partial (α, β - content of repeating units derived from acrylonitrile: 54% by weight, of the repeat units derived from hydrogenated butadiene content of: 9% by weight, a weight average molecular weight: 260, 000g/mol, polydispersity index (PDI)=2. 9) 0. 4 parts by weight of 1 using time homogenizing mixer (VMA LC55, Impeller/3000 rpm) is mixed. The resulting mixture four [chwi bead mill (NETZSCH Mini-a cer, beads having an average diameter: 1 mm, 3000 rpm speed) 90 minutes using the carbon nanotube dispersion milling block obtained.

[In the embodiment 2: Conductive material Dispersion number bath]

120 minutes and performing the number [...] beads in milling said in the embodiment 1, the carbon nanotube dispersion number was high pressure liquid coolant to said in the embodiment 1 embodiment an equivalent method.

[Comparison example 1: Conductive material Dispersion number bath]

Beads in milling said in the embodiment 1 and is not performing the number [...], an equivalent method embodiment the carbon nanotube dispersion number was high pressure liquid coolant to said in the embodiment 1.

[Comparison example 2: Conductive material Dispersion number bath]

30 minutes and performing the number [...] beads in milling said in the embodiment 1, an equivalent method embodiment the carbon nanotube dispersion number was high pressure liquid coolant to said in the embodiment 1.

[Comparison example 3: Conductive material Dispersion number bath]

60 minutes and performing the number [...] beads in milling said in the embodiment 1, an equivalent method embodiment the carbon nanotube dispersion number was high pressure liquid coolant to said in the embodiment 1.

[Comparison example 4: Conductive material Dispersion number bath]

In bundle type CNT CNT is, [thayng the writing type instead of said in the embodiment 1 (FT9110, Cnano yarn number, average strand diameter=15nm) number using the same method as the carbon nanotube dispersion was high pressure liquid coolant to said in the embodiment 1 and the embodiment [...] number.

[Experiment example 1]

In said in the embodiment 1 and comparison example 4 to 30 parts by weight conductive material such as to method, carbon nanotube size, purity, specific surface area BET, bulk density, [...], 2 secondary structure shape, diameter and of metal impurities content respectively, for table 1 have shown to result.

1) secondary structure shape and particle size 2: scanning electron microscopes CNT and size of 2 shape of secondary structure observed.

2) unit diameter: and BET were measured using SEM.

3) crystallinity (non-IG/ID): 514 nm using a laser with a wavelength Raman spectroscopy 1575 cm obtained by means^-1 To 1600 cm^-1 For 1340 cm in maximum peak intensity (IG) G band^-1 To 1360 cm^-1 From an average value of the maximum peak intensity (ID) (ID/IG) in D band of been.

4) volume resistivity: CNT powder in 1 mm diameter probe measuring current and voltage of the pressurized gas from the outer surfaces of insulating fill 4 have, by applying pressure when a volume resistivity value of 62 mpa correction coefficient was calculated.

5) BET specific surface area: BEL Japan yarn BELSORP a-mino II liquid using a nitrogen temperatures (77K) was calculated from the adsorption amount in nitrogen gas.

6) bulk density: 25 ml container filled with carbon nanotube a text comprising the weight after measuring the method were measured in terms of weight density.

[Experiment example 2]

High pressure liquid coolant in said in the embodiment 1 - 2 and comparison example 1 - 4 to the complex modulus and viscosity of each conductive material dispersion number type arm physical properties were measured.

For measuring complex modulus and viscosity, viscosity measuring equipment (RHEOMETER) rheometer (model name: AR series, number irradiation: TA INSTRUMENTS) as of circular rotation between the to two after setting, and filled with a conductive material into the corresponding interval corresponding to each dispersion unit 10 1/s shear rate volume^-3 10 in³ Setting an upper extent which measures the forces generated in the screwed, complex modulus were measured. Also, a shear rate of 1/6. 3s shear viscous rate when measured. For table 2 and also have shown to result 1, 2.

During the measurement the total shear fluidized (shear thining) phenomenon inhibin receptor.

Comparison example 1 - 3 according to the shear rate increased shear viscous rate arm curve graph is generated but, in the embodiment 1 and 2 have been found in the case of straight view which is less slope. Comparison example 1 - 3 arm curve exhibiting viscoelasticity in dispersions in passing the particles again sufficiently dispersed local sanitary are disclosed.

In degree of elastic and viscoelastic materials generally applying stress along different, less elastic and less variation in the meanings that stress but the increase of return electrode substrate. I.e. the dispersion can comprise a measure of the complex modulus of elasticity modulus of elasticity to provide a reduced value.

Complex modulus value is discrete time overlapped with the L-band, which is a dispersion of comparison example 1 - 3 in the embodiment 1 - 2 contrast is reduced significantly. Specifically shear rate increased shear viscous rate graph is complex shear modulus value is generated according to arm curve when not been 300Pa hereinafter.

Further, in the embodiment 1 and comparison example 2 and 3 2 of conductive material dispersion is lower than the shear viscosity rate shown. In the embodiment 1 - 2 of conductive material is uniformly dispersed carbon nanotube dispersion therefrom can be know.

[Experiment example 3]

High pressure liquid coolant to said in the embodiment 1, 2 and comparison example 1 - 4 carbon nanotube dispersion distribution of particle size and number in each solids content were measured. For table 3 have shown to result.

Particle size distribution: the laser diffraction particle size measuring device (e.g. Microtrac MT 3000) is introduced into the chamber to form a 60 W output after about 28kHz ultrasonic, 99% of an average particle diameter in a particle size distribution measuring device D in reference₉₉ Each was calculated.

In the embodiment 1 and 2 of example 1 to 3 carbon nanotube dispersion dispersed carbon nanotube - low value compared to the particle size distribution complex has been compared to the number shown.

[Number attainments 2: bath anode and number of lithium secondary battery]

A number said in the embodiment 1, 2 and comparison example 1 - 3 carbon nanotube dispersion in respective high pressure liquid coolant lithium active material for lithium and lithium secondary cell number was high pressure liquid coolant.

Particularly, in a high pressure liquid coolant as a positive plate active carbon nanotube dispersion LiNi number said in the embodiment 1_{0. 6} Mn_{0. 2} Co_{0. 2} O₂ Each carbon nanotube 100 parts by weight of 200 parts by weight of binder and PVdF 9700 adding parts by weight of a high pressure liquid coolant composition for forming an anode mixing (viscosity: 5000 mpa, s) his number. High pressure liquid coolant composition for number anode 630 mg/25 cm² After applying the loading amounts of aluminum current collector, 130 °C in after drying, by rolling a number anode was high pressure liquid coolant.

Further, cathodic active natural graphite, carbon black conductive material and PVdF binder weight ratio 85:10:5 N - methylpyrrolidone solvent in the composition for forming a negative electrode number and mixed at the ratio of high pressure liquid coolant, and cathode copper current collector was number by applying high pressure liquid coolant.

Said porous polyethylene separator interposed between anode and cathode prepared by the number such as number and high pressure liquid coolant electrode assembly, adjacent said electrode assembly case, high pressure liquid coolant injecting an electrolyte lithium secondary battery from receiving his number. The electrolyte solution is purification/purification of the methyl car this [thu which it sees (EC/DMC/EMC=3/4/3 mixing volume ratio) in an organic solvent consisting of dimethyl ethyl/1. 0M concentration of lithium [...] (LiPF₆ ) Dissolving a number was high pressure liquid coolant.

[Experiment example 4]

Said in the embodiment 1 - 2 and comparison example 1 - 3 by using a liquid conductive redistribution number high pressure liquid coolant for electrode formation composition for powder resistance were measured. Conductive material dispersion in combination with a complex modulus results result bright 4 and 3 also shown respectively.

Said powder grinding (grinding) and high pressure liquid coolant resistance number respective electrode composition for antireflection film after drying, powder resistance measuring instrument (HPRM a-A2, one tech company number) 62 mpa conditions using a long time.

The measurement result, in the embodiment 1 - 2 conductive material dispersion in 0. 5 g/cc to 1. 6 g/cc for powder density in volume resistance 0. 01 ohm, cm to 0. 04 ohm, to cm, 1 - 3 the same powder density interval in a comparison example shown as compared to low volume resistance value. In addition, conductive material dispersion complex modulus decrement width width similar to the resistance of the powder has been confirmed that the reducing, comparison example 1 - 3 in the embodiment 1 - 2 of conductive material dispersion as compared to cell falls therefrom under the level can be can be predicted.