COMPLEX TRANSITION METAL OXIDE PRECURSOR INCLUDING HIGH STRUCTURAL STABILITY, PREPARING METHOD FOR SAME, AND POSITIVE ELECTRODE ACTIVE MATERIAL USING SAME

27-10-2017 дата публикации
Номер:
KR1020170119573A
Принадлежит:
Контакты:
Номер заявки: 00-16-102047792
Дата заявки: 19-04-2016

[1]

The present invention refers to structurally stable composite transition metal oxide-based precursor and manufacturing method, said organ precursor layer is active material for lithium in bow material are disclosed.

[2]

Recent size reduction in electronic equipment capacity secondary battery is provided which according to data in a database, in particular nickel, cadmium battery, nickel, hydrogen battery lithium secondary cell with high energy density relative to the spotlight disclosed.

[3]

Positive plate active material of lithium secondary battery as lithium-containing cobalt oxide (LiCoO2 ) Data received from the which, in addition layered crystal structure of LiMnO2 , A spinel crystal structure of LiMn2 O4 Of lithium-containing manganese oxide, a lithium-containing nickel oxide LiNiO2 Etc. also be used.

[4]

While the aforementioned lithium composite transition metal oxidation current price generally as the anode 6 flightiness-based (Hexagonal) crystal structure composite transition metal hydroxide (Hydroxide) lithium-based precursor to the solid-state synthesis using hepatic progenitors by encoded number tank. 6 Flightiness crystal structure composite transition metal hydroxide-based precursor such unstable in the atmosphere, oxidation occurs locally is equal to unwanted surface reaction has taken place. The number safety of lithium into a stoichiometric molar ratio with anode that do not fit to tank, having the same capacity, door number generated point life and reliability is lowered. In particular, nickel (Ni) with high moisture sensitive reactive oxidized matters by easy High-a Ni-based as the anode transfers, as well as the aforementioned surface reactions in the air out to activation of the electrochemical properties may be significantly degraded reliability characteristics of final positive active material a door number point at the disclosed. The hereinafter for keeping while structurally stable, long-term reliability and electrochemical performance of lithium secondary battery the positive plate active material of novel configuration are provided which executing the development required.

[5]

The present invention refers to said prior art door such as number and hydrogen gas is provided which, in the air unstable 6 flightiness-based (Hexagonal) composite transition metal hydroxide-based precursor employed in place, structurally stable cubic (Cubic), or spinel type compound in the cubic crystal structure composite transition metal oxide-based precursor and a number (Cubic) [...] intended for the manufacturing method.

[6]

In addition the present invention refers to the aforementioned composite transition metal oxide-based precursor to lithium precursor number from bath, and reliability for a long period of electrochemical properties capable of exhibiting the intended number [...] another secondary material temperature characteristics.

[7]

In order to achieve said purposes, the present invention refers to nickel (Ni) and a heterologous (different kind) as composite transition metal oxide including transition metal, X-ray diffraction spectrum using CuK α line in diffraction angle (2 θ) 37 - 39 °, 42 - 44 °, 62 - 64 °, 75 - 77 °, and 78 - 80° 5 has two peaks shown in, a crystal structure is cubic (Cubic) in composite transition metal oxide-based precursor number [...] substrate.

[8]

One example of the present invention preferred according, X-ray diffraction spectrum diffraction angle of said precursors (2 θ) 30 - 32 °, 36 - 38 °, and 58 - 60° additionally includes two peaks shown in 3, cubic spinel crystal structure ([...]) on (Cubic) (Spinel) be a mixed again.

[9]

In the present invention, preferably said positive plate active material precursor is represented by a formula 1.

[10]

[Formula 1]

[11]

Nia Cob M'c Ox

[12]

In formula said,

[13]

M'is an alkali metal, an alkaline earth metal atom, group 13, group 14, group 15 elements, elements 16, 17 elements, transition metals, and rare earth element consisting of at least one selected from the group consisting 1 which,

[14]

1 ≤ x ≤ 1. 5, 0. 6 ≤ a < 1. 0, 0 ≤ b ≤ 0. 4, 0 ≤ c ≤ 0. 4, A + b + c=1 are disclosed.

[15]

In said formula 1, M'is Al, Mn, Zr, W, Ti, Mg, Sr, Ba, Ce, Hf, F, P, S, La and Y is at least one selected from the group consisting of preferably 1.

[16]

In the present invention, said precursor is 1 primary particles, primary particles are agglomerated 2 be a 1 or a plurality of primary particles. Wherein, said 1 difference particles have an average particle diameter of 0. 01 - 0. 8 Micro m range (flake) (Niddle) can be flexibility or needle shape. In addition, primary particles have an average particle diameter (D50) in a range is 3 to 30 micro m said 2, surface or plurality of internal pore structure can be present.

[17]

In addition, the present invention refers to the aforementioned composite transition metal oxide-based precursor to lithium precursor anode prepared by the number number temperature characteristics [...] substrate.

[18]

In the present invention, nickel (Ni) content of not more than 60% said entire transition metal as the anode preferably.

[19]

Further, the present invention refers to a manufacturing method of the aforementioned composite transition metal oxide-based precursor number [...] substrate.

[20]

More specifically, said manufacturing method represented by formula 2 is a composite transition metal hydroxide (Hydroxide) atmosphere or oxygen atmosphere at a temperature of 700 provided 1100 °C waiting time steps 1 - 12 to number bath 1308.

[21]

[Formula 2]

[22]

Nia Cob M'c (OH)2

[23]

In formula said,

[24]

M'is an alkali metal, an alkaline earth metal atom, group 13, group 14, group 15 elements, elements 16, 17 elements, transition metals, and rare earth element consisting of at least one selected from the group consisting 1 which,

[25]

0. 6 ≤ a < 1. 0, 0 ≤ b ≤ 0. 4, 0 ≤ c ≤ 0. 4, A + b + c=1 are disclosed.

[26]

In the present invention is conventional positive active material is used as the precursor 6 flightiness-based (Hexagonal) composite transition metal hydroxide-based precursor instead, cubic crystal structure is stable (Cubic), or spinel (spinel) phase surface by using cubic (Cubic) composite transition metal oxide-based precursor, improved storage and handling properties, said hereinafter for synthesis and deposition of positive active material, reliability for a long period and electrochemical properties for secondary battery excellent temperature characteristics can be [...] positive number.

[27]

Figure 1 in the embodiment 1 number prepared by the composite transition metal oxide-based precursor particles of shapes in the SEM Image are disclosed. Figure 2 comparison example 1 number prepared by the composite transition metal hydroxide-based precursor particles of shapes in the SEM Image are disclosed. Figure 3 X-ray diffraction analysis (XRD) of comparison example 1 of composite transition metal hydroxide-based precursor is a graph representing the result. X-ray diffraction analysis (XRD) positive plate active material prepared by the number of products in Figure 4 in the embodiment 1 according to the graph are disclosed. Figure 5 in the embodiment 1 and comparison example 1 in X-ray diffraction analysis (XRD) number prepared by the composite transition metal precursors of graph result are disclosed. Figure 6 in the embodiment 1 and comparison example 1 in anti-alk represents a lithium secondary battery having a positive electrode prepared by the number-temperature characteristics are disclosed.

[28]

Hereinafter, the present invention is described therein that are directionally.

[29]

In the present invention instead of conventional 6 flightiness-based (Hexagonal) composite transition metal hydroxide-based precursor, cubic crystal structure is stable (Cubic), or spinel (Spinel) surface (Cubic) composite transition metal oxide-based precursor cubic phase produced from the anodic active material precursor (precursor) characterized.

[30]

More specifically, in the present invention through conventional selected based composite transition metal precursor to diffuse number prepared by the hydroxide subjected, via this process number prepared by the composite transition metal precursors, structurally stable cubic (Cubic), or spinel (Spinel) cubic phase (cubic) crystal structure having a surface to be coated. The, improved storage and handling properties precursor strut, said precursors can be synthesized for a positive temperature characteristics hereinafter.

[31]

In particular, in the present invention with a positive plate active lithium into a stoichiometric molar ratio optimized, in particular high High-a Ni-based active material can be reactive number regardless of the high pressure liquid coolant, having the same capacity, life characteristics and long-term reliability can be a diffusion plate.

[32]

<Composite transition metal oxide-based precursor and manufacturing method>

[33]

The present invention according to the-based precursor composite transition metal oxide, nickel (Ni) and a heterologous (different kind) transition metal including composite transition as the metal oxide, cubic crystal structure (Cubic), or said cubic spinel structures and that the mixedly ([...]) characterized.

[34]

the composite transition metal oxide-based precursor, X-ray diffraction (XRD) spectrum for 2 on indicating the types of specific diffraction peek, this structure of the precursor exhibits.

[35]

The present invention according to a first embodiment form, the X-ray diffraction using Cu-a Kα line said composite transition metal oxide-based precursor modifying diffraction angle (2 θ) 37 - 39 °, 42 - 44 °, 62 - 64 °, 75 - 77 °, and 78 - 80° of diffraction peaks shown in 5 to be coated are concurrently present. This crystal structure is cubic (Cubic) about said composite transition metal oxide-based precursor of big.

[36]

In addition second form, the X-ray diffraction spectrum using said composite transition metal oxide-based precursor CuK α line in diffraction angle (2 θ) 37 - 39 °, 42 - 44 °, 62 - 64 °, 75 - 77 °, and 78 - 80° 5 shown in cubic (Cubic) derived from two peaks and, diffraction angle (2 θ) 30 - 32 °, 36 - 38 °, and 58 - 60° from 3 shown in spinel (Spinel) is equal to two peaks are concurrently present. This crystal structure is cubic (Cubic) of said composite transition metal oxide-based precursor is mixed spinel (Spinel) on the structure remains the same as the each other.

[37]

In the present invention, said cubic spinel (Spinel) (Cubic) mixedly structure on the percentage the composite transition metal oxide-based precursor [e.g., Nia Cob M'c Ox ] Composition, e.g. Ni, Co, Mn element ratio changed can be adjustable. In one embodiment, when increasing the ratio of said precursor in Co or Mn, spinel phase Co3 O4 Mn or3 O4 Substance can be spinel structures with an increased percentage. Wherein, said cubic spinel structure (Cubic) (Spinel) structure are mixed ratio 100: weight ratio may be 1 - 20, preferably less than 10% spinel (Spinel) structure.

[38]

The present invention according to a positive plate active material precursor is preferably represented by the formula 1.

[39]

[Formula 1]

[40]

Nia Cob M'c Ox

[41]

In formula said,

[42]

M'is an alkali metal, an alkaline earth metal atom, group 13, group 14, group 15 elements, elements 16, 17 elements, transition metals, and rare earth element consisting of at least one selected from the group consisting 1 which,

[43]

1 ≤ x ≤ 1. 5, 0. 6 ≤ a < 1. 0, 0 ≤ b ≤ 0. 4, 0 ≤ c ≤ 0. 4, A + b + c=1 are disclosed.

[44]

In said formula 1, a, b, and c is elements exhibit a compound in molar %, x is represented by the following compound in an oxygen fraction are disclosed.

[45]

In anode in bow material in particular of the present invention, a phosphorus nickel (Ni) content of 0. 6 Or more may be, preferably 0. 6 To 0. 9, More preferably 0. 7 To 0. 9 May be in the range disclosed. In addition x in oxygen fraction may be 1 or more, preferably 1 to 1. 5 Range. The aforementioned a, x range on are met, structural stability to the composite transition metal oxide-based precursor, in particular High-a Ni based anode temperature characteristics for the high pressure liquid coolant number can be hereinafter, excellent positive active material prepared by the number electrochemical properties (reliability for a long period, high initial capacity and charge) may be disclosed.

[46]

In the present invention High-a Ni-based composite oxide, (different kind) a small amount of metal, metalloid, or other anion of components M'by substituting, even 60% Ni content would increase stability final positive active material structure can be continuously maintain electrochemical properties.

[47]

Of the present invention according to a preferred example, said M'is Al, Mn, Zr, W, Ti, Mg, Sr, Ba, Ce, Hf, F, P, S, Y and La consisting of at least one selected from the group consisting 1 be a.

[48]

In the present invention, said composite transition metal oxide-based precursor 1 the primary particles, primary particles are agglomerated 2 be a 1 or a plurality of primary particles. The primary particles have an average particle diameter of said 1 0. 01 - 0. 8 Micro m range (flake) (Niddle) may be flexibility or needle shape, distributed over a surface and/or inside of be a pore structure. In addition said 1 2 3 the primary particles have an average particle diameter (D50) agglomerated primary particles to 30 micro m range can be a spherical in shape, is not limited particularly. X-ray diffraction in assays, said lattice constant a value of a=b=c precursors.

[49]

In the present invention, said composite transition metal oxide-based precursor materials since the structure surface, can exhibit a specific surface area of the mirror. In one embodiment, a specific surface area of 5 to 80 m measured along said precursors BET nitrogen adsorption method2 Range may be/g, preferably 5 to 50 m2 Implementation being/g.

[50]

In addition said composite transition metal oxide-based precursor powder tap density (tap density) is 2. 0 G/cc or more is preferable, more preferably 2. Be a 1 g/cc or more.

[51]

Hereinafter, the present invention according to manufacturing method a positive plate active precursors by the barrier metals other. However a limited only by manufacturing method has the, each process steps may be altered or it is mixed can be carried out selectively.

[52]

In the embodiment in one preferred said number tank are a positive plate active material precursor, composite transition metal hydroxide at a temperature of 1 - 12 hours in ambient environments 700 provided 1100 °C 1308. number by heat bath.

[53]

The composite transition metal hydroxide-based precursor nickel hydroxide (Hydroxide) contains only one number in the form of particularly high content is not. For example can be display such as formula 2.

[54]

[Formula 2]

[55]

Nia Cob M'c (OH)2

[56]

In formula said,

[57]

M'is an alkali metal, an alkaline earth metal atom, group 13, group 14, group 15 elements, elements 16, 17 elements, transition metals, and rare earth element consisting of at least one selected from the group consisting 1 which,

[58]

0. 6 ≤ a < 1. 0, 0 ≤ b ≤ 0. 4, 0 ≤ c ≤ 0. 4, A + b + c=1 are disclosed.

[59]

Of the present invention according to a preferred example, said M'is Al, Mn, Zr, W, Ti, Mg, Sr, Ba, Ce, Hf, F, P, S, Y and La consisting of at least one selected from the group consisting 1 be a.

[60]

In the present invention, said heat treatment atmosphere not one particularly number, can be for example an atmosphere or oxygen ambient environments. In addition not one number are specially heat treated, in one embodiment 700 provided 1100 °C heat treatment at a time can be in the range of 1 - 12, preferably in the range 700 provided 900 °C.

[61]

<A positive plate active material>

[62]

The present invention according to the anode, the aforementioned composite transition metal oxidation current price number from the lithium composite transition metal oxide precursor bath are disclosed.

[63]

More specifically, the anode can be represented by the formula 3 to said.

[64]

[Formula 3]

[65]

Liy Nia Cob M'c O2

[66]

In said formula 3,

[67]

M'is alkali metal, alkaline earth metal, elements 13, 14 group element, elements 15, 16 elements, elements 17, transition metal, and rare earth element consisting of at least one selected from the group consisting 1 which,

[68]

0. 6 ≤ a < 1. 0, 0 ≤ b ≤ 0. 4, 0 ≤ c ≤ 0. 4, And a + b + c=1, 0. 9 ≤ y ≤ 1. 3 Are disclosed.

[69]

Of the present invention according to a preferred example, said M'is Al, Mn, Zr, W, Ti, Mg, Sr, Ba, Ce, Hf, F, P, S, Y and La consisting of at least one selected from the group consisting 1 be a.

[70]

In the present invention, at least 60% nickel (Ni) as the anode said entire transition metal content of active material can be [...] rich (Ni-a rich) it will be a quality, preferably in a range 60 - 99%, more preferably 70 to 90% implementation being.

[71]

Said positive active material average diameter can be used specially number if one typical transmission range is not. In one embodiment 5 to 30 micro m may be range, preferably in the range 5 to 20 micro m.

[72]

The anode of the present invention, it was found according to a conventional method known bath number can be, for example dry type, a combination of both wet bath number can be disclosed.

[73]

One example of said method are a number bath anode temperature characteristics, said electrically conductive positive plate active material precursor and lithium hydroxide comprising the sidewall of the oxide product is dried solid via reaction number bath annealing can be disclosed.

[74]

Wherein, if the number can be used as current source comprising lithium lithium precursor is not one specifically. Preferably LiOH, Li2 CO3 Or a mixture of these can be.

[75]

In addition electrically conductive positive plate active material precursor and the it was found within the blending ratio of the conventional known lithium precursor can be a suitable clearance, in one embodiment 1:0. 95 To 1. 15 Be a weight ratio range.

[76]

Said positive plate active material precursor and dried by by a heat treatment such as lithium, lithium in the crystalline structure of substituted lithium composite transition metal oxide formed therein.

[77]

The number are specially heat treated not one, example of 700 to 1000 °C 0 under ambient conditions. 5 - 10 Time the preferred embodiment.

[78]

If necessary, heat treatment process is performed after 2 difference classifying process that is or can be.

[79]

The anode active material for lithium material used mainly in the present invention number produced therewith, other article for example is applicable to a wide variety can be used in the field.

[80]

<Anode>

[81]

In the present invention the aforementioned active material for lithium material and including a lithium rechargeable battery number [...] substrate.

[82]

The anode material of the present invention, said composite transition metal oxide-based precursor from a requirements including anode prepared by the number system is at least temperature characteristics. In one embodiment, a positive plate active material itself can be used with bow material said anode, said anode coupled with bow material mixing number number or a positive sum, sum number is obtained by further solvent added to an anode paste, the center of gravity of same of the present invention is formed by applying a positive electrode current collector further anode material for range with each other.

[83]

Said anode sugar industry known conventional method number bath according can be, in one embodiment, anode in bow material, and the binder necessary, conductive number, number number (coating) applied to a current collector slurry after mixing and stirring dispersed by high pressure liquid coolant and compresses the number bath after drying can be disclosed.

[84]

The dispersion medium, binder, conductive number, collector electrode material like a conventional sugar industry known to a silica which, a positive plate active contrast binder weight ratio of 1 - 10, the weight ratio range is 1 - 30 can be conductive number procedures in place.

[85]

Examples of conductive number available natural graphite, artificial graphite, carbon black, acetylene black series or gulf oil company, [khey black, [...] XC provided 72 (Vulcan), super P, coke current, carbon nanotubes, yes pin, or at least one mixture etc. 1.

[86]

In addition said number representative examples polytetrafluoroethylene (PTFE) coupled, polyvinylidene fluoride (PVdF) or its copolymer, styrene father hit diene rubber (SBR), and cellulose positioned, dispersion number representative examples eye small pro it will bloom alcohol, N - methylpyrrolidone (NMP), acetone etc..

[87]

Said metal material of the current collector has a highly conductive metal, said material paste for bonding with a metal-made hereinafter of voltage range which can be used even if no reactivity at. In one embodiment, aluminum, such as copper or stainless steel mesh (mesh), foil (foil) etc..

[88]

<Lithium secondary battery>

[89]

In addition, the present invention refers to said anode including secondary battery, preferably a lithium rechargeable battery number [...] substrate.

[90]

Lithium secondary battery of the present invention comprises the above-described composite transition metal oxide-based precursor from anode prepared by the number using number [...] not limited particularly and temperature characteristics and, according art known conventional method number bath 1308. For example, an anode and a cathode into the nonaqueous electrolyte layer number can be followed by high pressure liquid coolant.

[91]

The lithium secondary battery of the present invention a cathode, anode, separator, including electrolyte cell components used to, wherein the aforementioned number [...] cathode anode, layer, if necessary with respect to components of other added electrolyte and number per industry known conventional lithium secondary battery elements satisfying other.

[92]

In one embodiment, said cathode for lithium secondary battery using known conventional sugar industry can be temperature characteristics, but examples of lithium intercalation/non-number calais which is a d will do [syen a material is used, for example, lithium metal or lithium alloy, coke, artificial graphite, natural graphite, sewage sludge organic polymer compound, carbon fiber, silicon-based, tin-based etc.. In addition conductive number, a positive number in the same way as the aforementioned coupled and solvent are used.

[93]

In addition sugar industry nonaqueous electrolyte conventionally known electrolyte component, for example an electrolyte salt and a solvent for electrolyte without using a tool.

[94]

Said electrolyte salts is Li (i)+ , Na+ , K+ (Ii) PF silica selected from the group consisting of6- , BF4- , Cl- , Br- , I- , ClO4- , AsF6- , CH3 CO2- , CF3 SO3- , N (CF3 SO2 )2- , C (CF2 SO2 )3- And can be selected from the group consisting of a combination of an anionic compound, preferably double lithium salt. Specific examples LiClO lithium salt4 , LiCF3 SO3 , LiPF6 , LiBF4 , LiAsF6 , And LiN (CF3 SO2 )2 Etc.. These electrolyte salts either alone or in mixed 2 can be at least one.

[95]

Said electrolyte solvent is a cyclic carbonate, linear carbonate, lactone, ether, ester, acetonitrile, lactam, ketone can be used.

[96]

Examples of said cyclic carbonate (EC) ethylene carbonate, propylene carbonate (PC), butylene carbonate (BC), ethylene carbonate (FEC) fluorine at sea, said linear carbonate examples of diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), ethyl methyl carbonate (EMC), and methyl propyl carbonate (MPC) etc.. Examples gamma hydroxybutyrolactone (GBL) which said lactones, examples of said ether d butyl ether, tetrahydrofuran, 2 - methyl telogen, 1, 4 - dioxane, 1, 2 - [...], 1, 2 - [...] etc.. Examples of said esters are fully capped methyl, ethyl fully capped, profile are fully capped, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, butyl propionate, methyl pivalate etc.. In addition, methyl - 2 - pyrrolidone (NMP) and said lactam include N - like, said ketone include poly methyl vinyl ketone 1. In addition, said halogen derivatives of organic solvents are used enabled, not limited. In addition, organic solvents by said novel (glyme), [...], tree [...], writing rim 2 available disclosed. These organic solvents can be mixed at least one alone or 2.

[97]

A plurality of pixels are said inner short amount (兩) serves to electrolyte impregnated porous materials used without a number which serves pivotably. Number of non-limited examples are polypropylene, polyethylene, polyolefin porous separation membrane or inorganic material added to said porous separation membrane composite porous separation membrane etc..

[98]

Hereinafter the present invention in the embodiment described specifically through a but, in the embodiment of the present invention exemplified embodiments and experiments to form sends a which will, in the embodiment of the present invention to process by the experiment and the number range one and not the.

[99]

[In the embodiment 1]

[100]

1 - 1. A positive plate active material precursor number bath

[101]

Ni0. 8 Co0. 1 Mn0. 1 (OH)2 In a high pressure liquid coolant by heat number 3 in the embodiment 1 was 800 °C time positive plate active material of precursor.

[102]

1 - 2. A positive plate active number bath

[103]

A positive plate active material prepared by the number in said in the embodiment 1 - 1 precursor [Ni0. 8 Co0. 1 Mn0. 1 O1. 1 ] And LiOH as a lithium compound, H2 Using O 1 to 1. 02 Molar ratio after mixing time was 12 in the embodiment 1 by heat number 800 °C anode temperature characteristics in high pressure liquid coolant.

[104]

1 - 3. Number bath anode

[105]

A positive plate active material prepared by the number 2 in the embodiment 1 - 2 in 95 parts by weight of binder PvdF. 5 Parts by weight, of a conductive material carbon black 2. 5 Parts by weight of NMP solution was applied to a current collector can take place after it Al number slurry by dispersing a high pressure liquid coolant. The number anode was high pressure liquid coolant after rolling the roll press

[106]

1 - 4. Lithium secondary battery number bath

[107]

In lithium metal anode prepared by the number into an opposite said in the embodiment 1 - 3, EC/EMC/DEC (40/30/30, volume ratio) and 1M LiPF of4 An electrolyte solution to using coin cell (coin cell) number was a high pressure liquid coolant.

[108]

[Comparison example 1]

[109]

Each as a Ni hydroxide precursor and lithium precursor0. 8 Co0. 1 Mn0. 1 (OH)2 With LiOH as a lithium compound, H2 Using O 1 to 1. 02 12 800 °C after mixing molar ratio in comparison example 1 was high pressure liquid coolant heat treatment time number anode temperature characteristics.

[110]

The number in the range of 0.1 and [...] said anode temperature characteristics, such as comparison example 1 the same said in the embodiment 1 to a host computer in a positive and lithium secondary battery having the same number his high pressure liquid coolant.

[111]

[Experiment example 1] a positive plate active material precursor particle shape evaluation

[112]

In the embodiment 1 and comparison example 1 prepared by the composite transition metal precursor is in the range number in shape of, their SEM analysis was embodiment.

[113]

In the embodiment 1 and comparison example 1 SEM of composite transition metal precursors to identify the images result, in the embodiment 1 of composite transition metal oxide-based precursor particles in the form of 1 difference particles uniformly configured, comparison example 1 of composite transition metal hydroxide-based precursor can be formed much surface area compared to the cylindrical pores from (reference 1 - 2 also).

[114]

X-ray diffraction analysis (XRD) positive plate active precursors [experimental example 2]

[115]

In number in the embodiment 1 embodiment using XRD analysis was prepared by the composite transition metal oxide-based precursor.

[116]

The XRD analysis machine PANalytical X ' Rert PRO model O2, Cuκ α 8048eV X a-ray source was used. The, it is a diffraction angle 2 θ is 10 to 90 when the measured range, scan rate 0. Converting 9sec/step, also the results of the 4 is shown. The group used in composite transition metal hydroxide-based precursor of 0.50 to comparing the comparison example 1, the results of the 3 is also shown.

[117]

Experiment result, comparison example 1 of composite transition metal hydroxide-based precursor in the presence of only the 6 flightiness-based (Hexagonal) crystal structure derived peak characteristics as in the picomolar (reference 3 also).

[118]

The compared, positive plate active material of cubic crystal structure in the embodiment 1 of diffraction peaks derived from precursors (Cubic) 5 [2 θ=37 - 39 °, 42 - 44 °, 62 - 64 °, 75 - 77 °, 78 - 80°] parasite is 24.4, spinel (Spinel) structure of diffraction peaks of the housing 3 derived [2 θ=30 - 32 °, 36 - 38 °, 58 - 60°] the presence of his car (also 4 - 5 reference).

[119]

[Experiment example 3] secondary battery electrochemical performance evaluation (life)

[120]

Each number in the embodiment 1 and comparison example 1 using lithium secondary battery prepared by the electrochemical performance was assessed.

[121]

The electrochemical performance evaluation 3. 0V - 4. 4V voltage charge in embodiment 100 times when the initial straight measuring retention 1C/1C cycle test, and table 1 also shown to utilization means 4.

[122]

Experiment result, cubic composite transition metal oxide-based precursor with a positive electrode prepared by the number from the flightiness-based composite transition metal hydroxide-based precursor cell of the 6 in the embodiment 1 with a positive electrode prepared by the number as compared to comparative example 1 using, long life characteristics be informed that were excellent (reference 6 also).

[123]

Reliability for a long period [100Th , 1C/1C (%)]
Comparison example 171. 2
In the embodiment 176. 5



[1]

The present invention relates to a composite transition metal oxide including nickel (Ni) and a different transition metal while being a complex transition metal oxide precursor with crystal structure including a cubic system or a mixture of a cubic system and a spinel system as well as a preparing method and a positive electrode active material for a secondary battery manufactured with the precursor. The present invention uses the complex transition metal oxide precursor with the excellent structural stability, improves the storage and handling performance in a precursor stage, enables easy synthesizing of the positive electrode active material by using the precursor, and provides the positive electrode active material with excellent long-term reliability and electrochemical characteristics.

[2]

COPYRIGHT KIPO 2017

[3]



Nickel (Ni) and a heterologous (different kind) as composite transition metal oxide including transition metal, X-ray diffraction spectrum using CuK α line in diffraction angle (2 θ) 37 - 39 °, 42 - 44 °, 62 - 64 °, 75 - 77 °, and 78 - 80° 5 has two peaks shown in, characterized in crystal structure is cubic (Cubic) composite transition metal oxide-based precursor.

According to Claim 1, X-ray diffraction spectrum diffraction angle of said precursors (2 θ) 30 - 32 °, 36 - 38 °, and 58 - 60° additionally includes two peaks shown in 3, on cubic spinel (Spinel) (cubic) structure that the mixedly ([...]) characterized composite transition metal oxide-based precursor.

According to Claim 1, characterized in that said precursor is represented by formula 1 for a composite transition metal oxide-based precursor: Ni [formula 1]a Cob M'c Ox In formula said, M'is an alkali metal, an alkaline earth metal atom, group 13, group 14, group 15 elements, elements 16, 17 elements, transition metals, and rare earth element consisting of at least one selected from the group consisting 1 which, 1 ≤ x ≤ 1. 5, 0. 6 ≤ a < 1. 0, 0 ≤ b ≤ 0. 4, 0 ≤ c ≤ 0. 4, A + b + c=1 are disclosed.

According to Claim 1, said M'is Al, Mn, Zr, W, Ti, Mg, Sr, Ba, Ce, Hf, F, P, S, not less than 1 species selected from the group consisting of Y and La characterized composite transition metal oxide-based precursor.

According to Claim 1, primary particles said precursor is 1, 1 or a plurality of primary particles are agglomerated 2 characterized in that the primary particles into the transition metal oxide-based precursor.

According to Claim 5, said 1 difference particles have an average particle diameter of 0. 01 - 0. 8 Micro m range or needle shape and flexibility, said 2 primary particles have an average particle diameter (D50) range is 3 to 30 micro m characterized composite transition metal oxide-based precursor.

According to Claim 1, tap density said precursors (tap density) is 2. 0 G/cc or more than transition metal oxide-based precursor.

Lithium precursor described in any of Claim 1 to Claim 7 composite transition metal oxide-based precursor using a positive plate active material prepared by the number.

According to Claim 8, nickel (Ni) total transition metal content of not more than 60% positive plate active material characterized.

Formula 2 has a composite transition metal hydroxide ambient environments or oxygen to an atmosphere comprising steps 1 - 12 hours at a temperature of 700 provided 1100 °C, manufacturing method of a composite transition metal oxide-based precursor anti number 1: Ni [formula 2]a Cob M'c (OH)2 In formula said, M'is an alkali metal, an alkaline earth metal atom, group 13, group 14, group 15 elements, elements 16, 17 elements, transition metals, and rare earth element consisting of at least one selected from the group consisting and 1, 0. 6 ≤ a < 1. 0, 0 ≤ b ≤ 0. 4, 0 ≤ c ≤ 0. 4, A + b + c=1 are disclosed.