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Method for solving gas expansion of lithium-manganese dioxide flexible packaging battery and cathode material of lithium-manganese dioxide flexible packaging battery

A technology of flexible packaging batteries and lithium manganese dioxide, which is applied in the direction of battery electrodes, electrical components, primary battery use/maintenance, etc., can solve the problems of battery performance degradation and affect battery use, and achieve the effect of improving storage performance

Active Publication Date: 2010-05-19
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

But for this kind of battery packaged in plastic film, because the plastic film has no mechanical strength, when there is gas inside the battery, the size of the battery will change, which will affect the use of the battery and the performance of the battery will also decline.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Use electrolytic manganese dioxide (EMD): acetylene black: polytetrafluoroethylene emulsion (60%): polyacrylic acid amide cross-linked polymer = 84.5: 7: 8: 0.5 weight ratio batching, after mixing evenly, add water, press into Film, and laminated with aluminum mesh, as the positive electrode of the battery, and after being fully dried, it is used to make a soft package battery.

Embodiment 2

[0016] Use electrolytic manganese dioxide (EMD): acetylene black: polytetrafluoroethylene emulsion (60%): polyacrylic acid amide cross-linked polymer = 84:7:8:1.0, mix evenly, add water, and press to form a film , and pressed with the aluminum mesh as the positive electrode of the battery, and after being fully dried, it is used to make a soft package battery.

Embodiment 3

[0018] Use electrolytic manganese dioxide (EMD): acetylene black: polytetrafluoroethylene emulsion (60%): cross-linked sodium polyacrylate = 83:7:8:2, add water after mixing, press to form a film, and It is pressed with aluminum mesh as the positive electrode of the battery, and after being fully dried, it is used to make a soft package battery.

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PUM

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Abstract

The invention discloses a method for solving the gas expansion of a lithium-manganese dioxide flexible packaging battery and a cathode material of the lithium-manganese dioxide flexible packaging battery. In the invention, acrylic acid cross-linking resin which occupies 0.5-5% of the weight of a cathode is added into the battery cathode material of the lithium-manganese dioxide battery. Because the acrylic acid cross-linking resin as a strong water-adsorption material is added into the cathode material of the traditional lithium-manganese dioxide battery by the invention and can effectively adsorb trace free water or structural water existing in the cathode material of the lithium-manganese dioxide battery, the water in the cathode material of the lithium-manganese dioxide battery can not be released out to react with lithium and electrolyte so as to generate a gas product, thereby effectively solving the problem that the size of the battery can be changed to generate gas expansion when gas is generated inside the traditional plastic film flexible packaging battery. Meanwhile, the electric performance of the battery is not changed after the acrylic acid cross-linking resin is added, and the storage performance of the battery is enhanced.

Description

technical field [0001] The invention belongs to lithium battery materials, and in particular relates to a lithium manganese dioxide flexible package battery cathode. Background technique [0002] Lithium manganese dioxide flexible packaging battery, as a new structure product, has been quickly recognized by the market. This is a new type of flexible packaging lithium battery realized by replacing the metal casing with plastic film packaging. Since there may be a small amount of free water or structural water in the cathode material of lithium manganese dioxide battery, during storage or use, these water will react with lithium and electrolyte, and gas products are easily produced. For batteries, due to the high mechanical strength of the metal casing, this gas generally does not affect the battery volume. However, for such plastic film-packed batteries, since the plastic film has no mechanical strength, when gas is generated inside the battery, the size of the battery will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/50H01M4/62
CPCY02E60/12
Inventor 杨全生刘朋
Owner 武汉孚安特科技有限公司
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