Preparation method of power type lithium thionyl chloride battery positive electrode

A lithium thionyl chloride battery, power technology, applied in electrode manufacturing, battery electrodes, electrode rolling/calendering, etc., can solve the problems of positive electrode powder loss, flanging, falling off, etc., to achieve the effect of increasing capacity

Active Publication Date: 2020-10-02
武汉中原长江科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing the positive electrode of a power type lithium thionyl chloride battery, which can make the adhesive inside the positive electrode material form an integral fiber chain network adhesion, without the need for secondary paste, that is, to prepare a nick

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing a positive electrode of a power type lithium thionyl chloride battery, comprising the following steps:

[0043] 1) Mixing

[0044] Mix 1000g acetylene black, 140g absolute ethanol, 5400g pure water, 70g copper powder, and 90g polytetrafluoroethylene emulsion (60wt%) into a uniform semi-dry material;

[0045] Put the mixed semi-dry material into a drying oven at 70°C for 15 hours;

[0046] 2) Internet access

[0047] Use a high-speed rotary blade crusher to crush the dried material into fine particles with a particle size of 0.2mm to 1.2mm;

[0048] Fill the fine particle material evenly on both sides of the nickel expanded mesh through the packing tool, and use the roller press to compact the filled material. The density of the material after compaction is: 0.29g / cm 3 ;

[0049] 3) Fibrosis treatment

[0050] Put the filled and compacted positive electrode nickel mesh into the oven and bake at 240°C for 30min;

[0051] Soak the baked positive ...

Embodiment 2

[0057] A method for preparing a positive electrode of a power type lithium thionyl chloride battery, comprising the following steps:

[0058] 1) Mixing

[0059] Mix 1000g acetylene black, 230g absolute ethanol, 4600g pure water, 85g nickel powder, and 100g polytetrafluoroethylene emulsion (60wt%) into a uniform semi-dry material;

[0060] Put the mixed semi-dry material into a drying oven at 60°C for 15 hours;

[0061] 2) Internet access

[0062] Use a high-speed rotary blade crusher to crush the dried material into fine particles with a particle size of 0.2mm to 1.2mm;

[0063] Fill the fine particle material evenly on both sides of the nickel expanded mesh through the packing tool, and use the roller press to compact the filled material. The density of the material after compaction is: 0.30g / cm 3 ;

[0064] 3) Fibrosis treatment

[0065] Put the stuffed and compacted positive electrode nickel mesh into the oven and bake at 175°C for 1 hour;

[0066] Soak the baked posi...

Embodiment 3

[0072] A method for preparing a positive electrode of a power type lithium thionyl chloride battery, comprising the following steps:

[0073] 1) Mixing

[0074] Mix 1000g of acetylene black, 180g of absolute ethanol, 5200g of pure water, 65g of copper powder, and 120g of polyvinylidene fluoride emulsion (50wt% to 55wt%) to form a uniform semi-dry material;

[0075] Put the mixed semi-dry material into a drying oven at 70°C for 15 hours;

[0076] 2) Internet access

[0077] Use a high-speed rotary blade crusher to crush the dried material into fine particles with a particle size of 0.2mm to 1.2mm;

[0078] Fill the fine particle material evenly on both sides of the nickel expanded mesh through the packing tool, and use the roller press to compact the filled material. The density of the material after compaction is: 0.29g / cm 3 ;

[0079] 3) Fibrosis treatment

[0080] Put the filled and compacted positive nickel mesh into the oven and bake at 245°C for 30min;

[0081] Soak...

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Abstract

The invention discloses a preparation method of a power type lithium thionyl chloride battery positive electrode. The method comprises the following steps of 1) mixing materials, 2) putting on a net,3) carrying out fibration treatment, 4) carrying out staggered stretching on fibers and 5) cutting and white space leaving. In the fiber staggered stretching step, a pair of pressing blocks or pressing rollers of which the surfaces are provided with symmetrical fine raised grains are used for pressing or rolling the two surfaces of the positive electrode nickel pull net for multiple times in different directions and at different positions, so that the positive electrode nickel pull net is filled with an adhesive in a material to form integral fiber chain network adhesion; and then rolling andleveling of the positive electrode nickel pull net by using a smooth pressing roller are carried out. Secondary adhesion is not needed, the problems of powder falling, falling, flanging and the like of the positive electrode can be solved, and meanwhile, the capacity and the discharge voltage platform of the battery are also improved.

Description

technical field [0001] The invention relates to the field of lithium battery manufacturing, in particular to a method for preparing a positive electrode of a power type lithium thionyl chloride battery. Background technique [0002] In the preparation of the positive electrode of the existing power type lithium thionyl chloride battery, the raw material is an emulsion state, which can maintain long-term stability in a strong oxidizing environment as the bonding material. This type of bonding agent is used for bonding The principle is very unique. They have almost no physical adhesion. After the mixed positive electrode materials are baked at high temperature, the adhesive will gradually fibrillate and form a local grid structure. At this time, from a macro perspective, they already have Some adhesive properties have been improved, but the bonding effect is still very poor. Then soak the material baked at high temperature in isopropanol or absolute ethanol, and the fibrous a...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/08H01M4/62H01M6/14
CPCH01M4/0409H01M4/0435H01M4/0471H01M4/08H01M4/623H01M6/14
Inventor 孙英婴徐杨明吴际良李文杰
Owner 武汉中原长江科技发展有限公司
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