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Method for preventing liquid leakage of zinc-air battery

A zinc-air battery and anti-leakage technology, applied in the field of electrochemistry, can solve problems such as no breakthroughs

Inactive Publication Date: 2004-09-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People are trying to find solutions from the aspects of battery sealing structure, battery sealing materials, electrolyte formulation additives, etc., but no fundamental breakthrough has been made so far.

Method used

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  • Method for preventing liquid leakage of zinc-air battery
  • Method for preventing liquid leakage of zinc-air battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] ——Making air diffusion electrodes for zinc-air batteries

[0018] First put the materials of the waterproof breathable layer and the catalytic layer on the large roller mixing equipment, and then repeatedly roll and mix them evenly, and make them fibrous, and then add the fibrous materials to the small roller forming equipment for roll forming. Thereby two kinds of cylindrical membranes are made; the two kinds of cylindrical membranes are set together with the cylindrical current collecting net, and then rolled on the small roll forming equipment to form a cylindrical air diffusion electrode. The air diffusion electrode consists of a current collecting net layer, a waterproof breathable layer and a catalytic layer from the outside to the inside.

[0019] ——Preparation of zinc electrode, separator and battery case

[0020] The zinc electrode is made of pasty zinc paste, and the diaphragm material is polypropylene non-woven fabric film. The battery casing is the same as ...

Embodiment 2

[0025] ——Making air diffusion electrodes for zinc-air batteries

[0026] The preparation method is the same as in Example 1, but finally cut into 10×10cm square pole pieces.

[0027] ——Preparation of zinc electrode, separator and battery case

[0028] The zinc electrode adopts pasty zinc paste, the diaphragm material is polypropylene non-woven film, and the battery case adopts a porous plastic case. A layer of fibrous polyacrylic water-absorbing resin is pasted on the inner side of the battery case.

[0029] -Assembly of sample battery

[0030] After the air electrode is formed, it is connected to the positive electrode cover of the battery by tab welding, and the positive and negative electrodes of the battery are separated by a diaphragm on the inner sleeve, and finally the battery case is sealed to obtain a square zinc-air battery.

[0031] The overall size of the assembled square zinc-air sample battery is: 102mm×12mm×102mm, and it is discharged with a constant current ...

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Abstract

The invention relates to a method for leakproof liquid of zinc air battery. Resin layer with water absorbing capacity is setup on inside of battery container to totally absorb leaked liquid in the battery. Thus electrolyte will not leak to the outside of battery container. The invented method not only increases discharging current of battery, but also prevent electrical appliance, which uses battery, from damage caused by corrosion of leaked liquid.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an anti-leakage method for a zinc-air battery. Background technique [0002] A zinc-air battery is a battery that uses zinc as the negative electrode active material and oxygen in the air as the positive electrode active material. After the oxygen required by the battery is consumed, it can be continuously replenished from the air to continue to generate current. Therefore, as long as there is sufficient The negative electrode material zinc and the electrolyte exist, and the battery can continue to work continuously. Therefore, the remarkable feature of this battery is its high specific energy, which can theoretically reach 1350Wh / Kg. Taking the commonly used alkaline zinc-air battery as an example, the reactions of the two electrodes and the battery are as follows: [0003] Negative pole <chemistry num="001"> <chem file="01129823_cml001.xml" / > < / chemistry>...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/00H01M12/02H01M12/06
CPCY02E60/128Y02E60/10
Inventor 周震涛周晓斌于东生
Owner SOUTH CHINA UNIV OF TECH