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Preparation method of lithium thionyl chloride power type battery positive electrode

A lithium thionyl chloride power and battery cathode technology, which is applied in electrode manufacturing, battery electrodes, lithium storage batteries, etc., can solve problems such as transformation of the production process of power-type cathodes, and achieve convenient operation, improve overall consistency, and good uniformity. Effect

Inactive Publication Date: 2018-04-13
武汉孚安特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the positive electrode assembly process of the energy-type lithium thionyl chloride battery is completely different from the positive electrode assembly process of the power-type lithium thionyl chloride battery, and there is no inspiration for the transformation of the power-type positive electrode production process.

Method used

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  • Preparation method of lithium thionyl chloride power type battery positive electrode
  • Preparation method of lithium thionyl chloride power type battery positive electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Powder pretreatment

[0035] As shown in table 1, 1000g acetylene black, 6g absolute alcohol, 60g positive electrode conductive agent copper powder, 70g polytetrafluoroethylene emulsion binder, 3000g pure water are mixed into wet material and stir;

[0036] The wet material enters the extrusion machine with a sieve aperture of 0.5mm for extrusion, and obtains a strip material with a length of 1-2cm;

[0037] The strip material enters the centrifugal pellet machine to obtain fine pellets with a particle size of 0.5 mm;

[0038] The fine pellets were dried in a vacuum oven at 100°C for 8 hours;

[0039] 2) powder online

[0040] The obtained dried fine pellets are crushed into fine powders with a particle size of 0.1-0.2 μm;

[0041] Mix the powder with a 50% alcohol solution in a mass ratio of 1:2.2 to form a semi-dry powder;

[0042] The semi-dry powder is evenly sprinkled on both sides of the nickel expanded grid through the impeller feeder, and the powder is bo...

Embodiment 2

[0046] 1) Powder pretreatment

[0047] As shown in table 1, 1000g acetylene black, 10g absolute alcohol, 80g positive electrode conductive agent nickel powder, 300g vinylidene fluoride emulsion binder, 3500g pure water are mixed into wet material and stir;

[0048] The wet material enters the extrusion machine with a sieve aperture of 1.5mm for extruding, and obtains a strip material with a length of 1-2cm;

[0049] The strip material enters the centrifugal pellet machine to obtain fine pellets with a particle size of 1.5mm;

[0050] The fine pellets were dried in a vacuum oven at 100°C for 9 hours;

[0051] 2) powder online

[0052] The obtained dried fine pellets are crushed into fine powders with a particle size of 0.1-0.2 μm;

[0053] Mix the powder with a 70% alcohol solution in a mass ratio of 1:1.5 to form a semi-dry powder;

[0054] The semi-dry powder is evenly sprinkled on both sides of the nickel expanded mesh through the impeller feeder, and the powder is bonde...

Embodiment 3

[0060] 1) Powder pretreatment

[0061] As shown in table 1, 1000g acetylene black, 8g absolute alcohol, 70g positive electrode conductor platinum powder, 75g polyacrylic acid emulsion adhesive, 3200g pure water are mixed into wet material and stir;

[0062] The wet material enters the extrusion machine with a sieve aperture of 1.5mm for extruding, and obtains a strip material with a length of 1-2cm;

[0063] The strip material enters the centrifugal pellet machine to obtain fine pellets with a particle size of 1.2mm;

[0064] The fine pellets were dried in a vacuum oven at 100°C for 10 hours;

[0065] 2) powder online

[0066] The obtained dried fine pellets are crushed into fine powders with a particle size of 0.1-0.2 μm;

[0067] Evenly mix the powder with a 99% alcohol solution in a mass ratio of 1:2 to form a semi-dry powder;

[0068] The semi-dry powder is evenly sprinkled on both sides of the nickel screen through the impeller feeder, and the powder is bonded to the ...

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Abstract

The invention discloses a preparation method of a lithium thionyl chloride power type battery positive electrode. The preparation method comprises the steps of 1) performing powder material pretreatment; performing material mixing to form a half-dried wet material and performing uniform stirring; putting the half-dried wet material into a banded extruder with the sieving pore diameter of 0.5-1.5mmto be subjected to band extrusion to obtain a strip-shaped material with the length of 1-2cm; putting the strip-shaped material into a centrifuging pelletizing machine to obtain a fine pellet material with the grain diameter of 0.5-1.5mm; and performing vacuum drying on the fine pellet material for 8-10h; 2) putting the fine pellet material on a net: performing smashing on the obtained dried finepellet material into a fine powder material; performing uniform mixing on the fine powder material and an aqueous solvent to obtain a half-dried powder material; and putting the half-dried powder material on a nickel net to be subjected to vacuum drying and fibering; and 3) positive electrode forming: performing rolling by adopting a rolling mill to prepare a positive electrode body with requiredthickness. By processing the wet material through the extruder and the pelletizing machine, the formula materials in the finally prepared positive electrode are more uniform in distribution, and higher structural strength, more developed net-hole structure, no powder falling-off, and more environment friendly and safer production process are achieved, and continuous production operation can be realized.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for preparing a positive electrode of a lithium thionyl chloride power type battery. Background technique [0002] The existing lithium thionyl chloride battery positive electrode manufacturing process has been basically formed 30 years ago and has been in use until now. Specifically: dry the powder paste at 150°C, then soak the paste in isopropanol or alcohol and knead it. After forming a very thick film, the thick film is rolled into a thin wet film. After the wet film is dried, it is bonded to the nickel mesh with an adhesive, and then the positive electrode sheet with the bonded film is dried and fibrous at high temperature. Finally, it is rolled and cut into pieces. [0003] There are many unstable factors in the existing preparation method: 1) the positive electrode film is a wet film. After rolling, because the film absorbs a large amount of combustible organic...

Claims

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Application Information

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IPC IPC(8): H01M4/139H01M4/04H01M10/052
CPCH01M4/0402H01M4/0435H01M4/139H01M10/052Y02E60/10
Inventor 杨辉代江华
Owner 武汉孚安特科技有限公司
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