Furnace charging method for aluminum electrolytic bath

Method for preparing ceramic plunger

The invention discloses a preparation method for a ceramic plunger and relates to a preparation method for a high-aluminium ceramic plunger pump. The invention is characterized in that: bauxite clinker, Alpha-Al2O3, barium carbonate, quartz, chromium oxide, cooked talc and Lushan clay materials are employed as raw material, grinded, then added with small amount of Arabic gum water solution and water evenly mixed; the next steps are casting, embryonic plant drying and calcinating. By adopting industrial bauxite clinker as raw material to make a high-aluminium ceramic plunger pump, the inventionhas low cost, and by adopting casting, expensive cost for mechanical equipment is saved, thus reducing production cost; in addition, the high-aluminium ceramic plunger pump produced by the method haslong service life and is easy to be popularized in the industrial field.

Method for deironing aluminum chloride solution

The invention relates to a method for deironing aluminum chloride solution, which comprises the following steps of: introducing iron-containing aluminum chloride solution into a resin column, and deironing by using the iron adsorption capacity of resin to obtain aluminum chloride refined solution, wherein the pH value of the aluminum chloride solution is 1.0 to 3.0, the processing temperature is room temperature to 90 DEG C, and the flow rate is the aluminum chloride solution in an amount which is 1 to 4 times the volume of the resin per hour. The method has the characteristics that the process is simple, the production process is easy to control, and product quality is stable. In addition, by the method, the raw material source of low-iron aluminum chloride solution and a subsequent product thereof can be expanded, and production cost is reduced.

Method for treating SO2 in coal firing smoke by red mud

Method for thermite welding aluminium electrolytic cell cathode steel bar

Maintaining method for aluminium electrolytic cell short-circuit port

The present invention relates to a maintenance method of short-circuit notch of aluminium electrolysis bath. It is characterized by that when the short-circuit notch of aluminium electrolysis bath is damaged, after the cathodic mother lines of two connected electrolytic baths are connected under the ground covering plate, the maintenance operation of short-circuit notch of aluminium electrolysis bath can be implemented. Besides, said invention also provides the concrete steps of said maintenance method.

Comprehensive process of treating alkaline waste water from alumina plant and domestic sewage

Deep decomposition method for sodium aluminate solution

A deep decomposition method of sodium aluminate solution relates to a technique of further deep decomposition of seed pregnant solution during alumina production. The technique is characterized in that lime milk is added into the seed pregnant solution to precipitate undecomposed Al2O3; the Al2O3 deposit is then separated from the seed pregnant solution by filtration and next leached out with sodium carbonate after washing; the solution which separates calcium carbonate deposit is then treated with carbonation decomposition to obtain aluminium hydroxide products. The deep decomposition method of the sodium aluminate solution of the invention effectively lessens futile cycles, slows down the generation of scabs, reduces the vapor concentration scale of the pregnant solution and improves production capacity of equipment.

Method for preparing ceramic plunger

The invention discloses a preparation method for a ceramic plunger and relates to a preparation method for a high-aluminium ceramic plunger pump. The invention is characterized in that: bauxite clinker, Alpha-Al2O3, barium carbonate, quartz, chromium oxide, cooked talc and Lushan clay materials are employed as raw material, grinded, then added with small amount of Arabic gum water solution and water evenly mixed; the next steps are casting, embryonic plant drying and calcinating. By adopting industrial bauxite clinker as raw material to make a high-aluminium ceramic plunger pump, the invention has low cost, and by adopting casting, expensive cost for mechanical equipment is saved, thus reducing production cost; in addition, the high-aluminium ceramic plunger pump produced by the method has long service life and is easy to be popularized in the industrial field.

NEGATIVE ELECTRODE SHEET AND METHOD FOR PREPARING THE SAME, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND DEVICE

A negative electrode sheet includes a current collector, and a first active material layer and a second active material layer that are sequentially provided on at least one surface of the current collector. The first active material layer includes a first negative electrode active material. Particle sizes of the first negative electrode active material satisfy: 0.02≤A=(Dn10)/(Dv50)≤0.2. The second active material layer includes a second negative electrode active material. Particle sizes of the second negative electrode active material satisfy: 0.02≤A=(Dn10)/(Dv50)≤0.3; and Aand Asatisfy 1 Подробнее

Secondary battery and electrical apparatus comprising same

The present application provides a secondary battery including a negative electrode sheet, and the negative electrode sheet includes: a negative electrode current collector; a first negative film layer provided on at least one surface of the negative electrode current collector; and a second negative film layer provided on a surface of the first negative film layer; where the first negative film layer includes a first negative active material and a first conductive agent, and the first negative active material includes a silicon-based material; and a mass proportion of the silicon-based material in the first negative film layer is greater than or equal to 30%, and a mass proportion of the first conductive agent in the first negative film layer is greater than or equal to 25%. A battery cell of the secondary battery of the present application does not easily expand and has good cycle performance. The present application further provides a power consumption apparatus including the foregoing secondary battery.

Negative electrode plate and preparation method therefor, secondary battery, battery module, battery pack and electric device

Provided is a negative electrode plate, comprising: a negative electrode current collector and a first negative electrode active material layer. The first negative electrode active material layer is arranged on at least one surface of the negative electrode current collector, wherein, components of the first negative electrode active material layer comprise, by mass: 30%-70% of a silicon-based material, 15%-40% of a binder and 15%-40% of a conductive agent.

Negative electrode active material and preparation method thereof, secondary battery, battery module, battery pack, and electrical apparatus

A negative electrode active material and a preparation method, a secondary battery, a battery module, a battery pack and an electrical apparatus are provided. The negative electrode active material comprises an inner core, an interlayer and an outer shell layer, wherein the interlayer is cladded on the surface of the inner core, and the outer shell layer is cladded on the surface of the interlayer; the inner core comprises silicon, an oxide of silicon and lithium silicate; the interlayer comprises silicon, or silicon and lithium silicate; and the outer shell layer comprises amorphous carbon. An inner core comprising silicon, an oxide of silicon and lithium silicate is used as a nucleus, and an interlayer containing silicon as well as an outer shell layer comprising amorphous carbon are cladded outwards in sequence to form a uniformly cladded and structurally stable negative electrode active material with a core-shell structure.

Negative electrode plate and preparation method therefor, secondary battery, battery module, battery pack and apparatus

Negative electrode active material and preparation method therefor, secondary battery, battery module, battery pack, and power device

The present application relates to the technical field of secondary batteries, and in particular to a negative electrode active material and a preparation method, a secondary battery, a battery module, a battery pack and an electrical apparatus. The negative electrode active material of the present application comprises an inner core, an interlayer and an outer shell layer, wherein the interlayer is cladded on the surface of the inner core, and the outer shell layer is cladded on the surface of the interlayer; the inner core comprises silicon, an oxide of silicon and lithium silicate; the interlayer comprises silicon, or silicon and lithium silicate; and the outer shell layer comprises amorphous carbon. In the present application, an inner core comprising silicon, an oxide of silicon and lithium silicate is used as a nucleus, and an interlayer containing silicon as well as an outer shell layer comprising amorphous carbon are cladded outwards in sequence to form a uniformly cladded and structurally stable negative electrode active material with a core-shell structure, so that not only the content of silicon element in the negative electrode active material can be significantly increased, but also the side reactions between the silicon components and the active lithium in the electrolyte solution can be effectively suppressed, thereby simultaneously increasing the first reversible specific capacity and the first charge efficiency of the secondary battery.

Negative electrode active material and method for preparation thereof, secondary battery comprising same and electrical device

The present application provides a negative electrode active material, a secondary battery comprising the same and an electrical device, wherein the negative electrode active material comprises a matrix material and a silicon-based material, the matrix material comprises a plurality of pore structures, at least a part of the silicon-based material is located in pore structures of the matrix material, the silicon-based material comprises a crystalline silicon-based material, a region formed by extending from outer surface of particle of the negative electrode active material to inside of the particle by a distance of 0.5 times a length between any point on the outer surface of the particle of the negative electrode active material and a core of the particle is recorded as an outer region, and a region inside the outer region is recorded as an inner region.

Negative electrode plate and preparation method thereof, secondary battery, battery module, battery pack, and electrical apparatus

Provided is a negative electrode plate, comprising: a negative electrode current collector and a first negative electrode active material layer. The first negative electrode active material layer is arranged on at least one surface of the negative electrode current collector, wherein, components of the first negative electrode active material layer comprise, by mass: 30%-70% of a silicon-based material, 15%-40% of a binder and 15%-40% of a conductive agent.

Negative electrode active material and preparation method therefor, secondary battery comprising same, and electric device

The present application provides a negative electrode active material (100), a secondary battery comprising the same and an electrical device, wherein the negative electrode active material (100) comprises a matrix material and a silicon-based material, the matrix material comprises a plurality of pore structures, at least a part of the silicon-based material is located in pore structures of the matrix material, the silicon-based material comprises a crystalline silicon-based material, a region formed by extending from outer surface of particle of the negative electrode active material (100) to inside of the particle by a distance of 0.5 times a length between any point on the outer surface of the particle of the negative electrode active material (100) and a core of particle (O) is recorded as an outer region (101), and a region inside the outer region (101) is recorded as an inner region (102), and in cross-sectional image of the negative electrode active material (100), total cross-sectional area of the crystalline silicon-based material in the outer region (101) is smaller than total cross-sectional area of the crystalline silicon-based material in the inner region (102). The secondary battery provided by the present application can have high energy density, high First Coulombic Efficiency, long cycle life and long storage life at the same time.

Negative electrode active material and preparation method therefor, secondary battery comprising negative electrode active material, and electric device

The present application provides a negative electrode active material, a secondary battery comprising the same and an electrical device, wherein the negative electrode active material comprises a matrix material and a silicon-based material, the matrix material comprises a plurality of pore structures, at least a part of the silicon-based material is located in pore structures of the matrix material, at least a part of the silicon-based material has a crystalline structure, the silicon-based material comprises a first silicon-based material and a second silicon-based material with different grain sizes, and a ratio of grain size of the first silicon-based material to grain size of the second silicon-based material is greater than or equal to 1.6. The negative electrode active material provided by the present application has high capacity, high First Coulombic Efficiency and low volume expansion, and can result in a secondary battery having high energy density, high First Coulombic Efficiency, long cycle life and long storage life at the same time.

Secondary battery and electrical apparatus comprising same

Negative electrode active material and method for preparation thereof, secondary battery comprising same and electrical device

The present application provides a negative electrode active material, a secondary battery comprising the same and an electrical device, wherein the negative electrode active material comprises a matrix material and a silicon-based material, the matrix material comprises a plurality of pore structures, at least a part of the silicon-based material is located in pore structures of the matrix material, at least a part of the silicon-based material has a crystalline structure, the silicon-based material comprises a first silicon-based material and a second silicon-based material with different grain sizes, and a ratio of grain size of the first silicon-based material to grain size of the second silicon-based material is greater than or equal to 1.6. The negative electrode active material can result in a secondary battery having high energy density, high First Coulombic Efficiency, long cycle life and long storage life at the same time.

Negative electrode active material and preparation method therefor, secondary battery comprising negative electrode active material, and electric device

Negative electrode active material and preparation method therefor, secondary battery, battery module, battery pack, and power device

Silicon-carbon composite material and preparation method therefor, negative electrode material, negative electrode sheet, electrode assembly, battery, electric device, and carbon matrix

This application provides a silicon carbon composite material and a preparation method therefor, a negative electrode material, a negative electrode plate, an electrode assembly, a battery, an electric apparatus, and a carbon matrix, relating to the field of battery technologies. The silicon carbon composite material includes a carbon matrix and a silicon material, the carbon matrix has a cross-linked porous structure internally, and the silicon material is at least partially distributed in the cross-linked porous structure. A value of flexibility C1 of the silicon carbon composite material satisfies 0.4≤C1≤2. In this application, C1 is a factor by which a compression deformation variable of the silicon carbon composite material is scaled to be equal to its rebound deformation variable, representing flexibility of the silicon carbon composite material. When the C1 value satisfies 0.4≤C1≤2, the silicon carbon composite material has good flexibility, reducing overall impact of expansion stress of silicon on the silicon carbon composite material, and allowing for a certain degree of contractility of the carbon matrix framework, so that residual stress can be received and released, thereby maintaining overall stability of the silicon carbon composite material.

Silicon-carbon composite material and negative electrode sheet containing same

The present application relates to a silicon-carbon composite material in the form of particles comprising a porous carbon skeleton, a silicon-containing deposition layer, and a carbon-containing coating layer, wherein the silicon-containing deposition layer is in pores of the porous carbon skeleton, the carbon-containing coating layer is on the silicon-containing deposition layer and/or on the surface of the particles, and the silicon-carbon composite material has an oil absorption number of 35 mL/100 g to 80 mL/100 g. The silicon-carbon composite material of the present application has a high energy density and an improved cycle life. In addition, the present application further relates to a negative electrode plate comprising the material, a secondary battery, a battery module, a battery pack, and a power consuming device.