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A kind of preparation method of zinc electrode for zinc-air battery

A zinc-air battery and zinc electrode technology, which is applied to the electrodes of primary batteries, fuel cell half-cells and primary battery half-cells, and can solve the problems of reduced discharge efficiency, poor zinc cake absorption capacity, and fragility , to avoid agglomeration, improve poor absorption capacity, and improve discharge efficiency

Inactive Publication Date: 2017-12-01
上海博暄能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to prolong the service life and storage period of the battery, the new zinc electrode that appears is made of active zinc powder for alkaline batteries, corrosion inhibitors, and binders according to a certain mass ratio. "Zinc cake" is obtained after drying treatment, but the "zinc cake" made in this way is fragile, and the zinc cake has poor absorption capacity for electrolyte after adding electrolyte
The injected electrolyte cannot be absorbed in time, and the electrolyte overflows when the liquid is added, which eventually leads to insufficient electrolyte addition in the battery, and the zinc cake is easy to agglomerate during the reaction process. The zinc cannot be completely reacted, and the discharge efficiency is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] This embodiment provides a method for preparing a zinc electrode for a zinc-air battery, comprising the following steps:

[0016] (a) 100kg N-vinylimidazolium salt monomer (N-vinylimidazolium chloride) and 0.5kg initiator (benzoin ethyl ether) are dissolved in ethanol to form a 2mol / L solution, and placed under inert gas protection Carry out the polymerization reaction at 60 ℃ in the reaction bottle of the reaction bottle to form the polymerization solution;

[0017] (b) Add 500 meshes of 200kg zinc powder and 30kg crushed sponge to the polymerization solution, add excess acetone (about 3 times the volume of ethanol) therein under stirring conditions, let stand to settle, filter to get the filter residue;

[0018] (c) Select a box container with an open upper end, provide a plurality of drainage holes at the bottom of the box container, and lay diaphragm paper at the bottom;

[0019] (d) Pour the filter residue into the box container, then add deionized water to 1 / 2 of...

Embodiment 2

[0021] This embodiment provides a method for preparing a zinc electrode for a zinc-air battery, comprising the following steps:

[0022] (a) 100kg N-vinylimidazolium salt monomer (N-vinylimidazolium chloride) and 1.5kg initiator (benzoin ethyl ether) are dissolved in ethanol to form a 10mol / L solution, and placed under inert gas protection Carry out the polymerization reaction at 70 ℃ in the reaction bottle of the reaction bottle to form the polymerization solution;

[0023] (b) Add 1000 meshes of 300kg zinc powder and 40kg crushed sponge to the polymerization solution, add excess acetone (about 5 times the volume of ethanol) therein under stirring conditions, let stand to settle, filter to get the filter residue;

[0024] (c) Select a box container with an open upper end, provide a plurality of drainage holes at the bottom of the box container, and lay diaphragm paper at the bottom;

[0025] (d) Pour the filter residue into the box container, then add deionized water to 2 / 3 ...

Embodiment 3

[0027] This embodiment provides a method for preparing a zinc electrode for a zinc-air battery, comprising the following steps:

[0028] (a) 100kg N-vinylimidazolium salt monomer (N-vinylimidazolium chloride salt) and 1kg initiator (benzoin ethyl ether) are dissolved in ethanol to form a 5mol / L solution, placed in an inert gas protected Carry out polymerization reaction at 75°C in the reaction bottle to form a polymerization solution;

[0029] (b) Add 800 meshes of 250kg of zinc powder and 20kg of crushed sponge to the polymerization solution, add excess acetone (about 4 times the volume of ethanol) therein under stirring conditions, let stand to settle, and filter to get the filter residue;

[0030] (c) Select a box container with an open upper end, provide a plurality of drainage holes at the bottom of the box container, and lay diaphragm paper at the bottom;

[0031] (d) Pour the filter residue into the box container, then add deionized water to 60% of its volume, place a ...

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PUM

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Abstract

The invention relates to a preparation method of a zinc electrode of a zinc-air battery. The preparation method comprises the following steps: (a) dissolving a vinylimidazole onium salt monomer and an initiator in ethanol for polymerization reaction to obtain a polymer solution; (b) adding zinc powder with the particle size being 500-1000 meshes and crushed sponge into the polymer solution, adding acetone into the mixture under a stirring condition, standing for settling, and filtering to obtain filter residue; (c) with a box container with an opening in the upper end, forming a plurality of leaching holes in the bottom of the box container, and laying separator paper at the bottom of the box container; and (d) pouring the filter residue into the box container, adding deionized water into the container till the contents fill 1 / 2-2 / 3 of the container, spreading a woven mesh woven by alkali-free glass filaments, and drying in vacuum at 100-150 DEG C for 10-15 hours. As the zinc powder and the crushed sponge are wrapped by a polymer formed by the vinylimidazole onium salt monomer, the poor absorbing capacity of zinc cake to electrolyte can be alleviated.

Description

technical field [0001] The field of energy devices of the present invention relates to a zinc electrode, in particular to a preparation method of a zinc electrode for a zinc-air battery. Background technique [0002] The negative electrode of the existing zinc-air battery mostly adopts the material form of zinc paste, which is in a fluid state. For the battery negative electrode used as a backup battery, the zinc paste is not easy to store for a long time, and it is inconvenient to replace it mechanically. The zinc paste has fluidity. It requires that the battery must be packaged before putting in the zinc paste, which requires the battery carbon electrode and the battery frame to be packaged in advance. The packaging of these two components can only be done by gluing, which is not conducive to the recycling of materials. , After bonding, it is required to be tightly sealed and leak-free, which has high requirements on the worker's technical level and is not conducive to ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/12C08F126/06C08F226/06C08F212/08H01M12/06
CPCC08F126/06C08F226/06H01M4/12H01M12/06C08F212/08
Inventor 方倩
Owner 上海博暄能源科技有限公司