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Zinc cathode of zinc-nickel secondary battery and method for coating oxide on zinc oxide surface

A secondary battery, surface coating technology, applied to battery electrodes, alkaline battery electrodes, circuits, etc., can solve the problems of low theoretical gram capacity of calcium zincate and reduced battery capacity

Inactive Publication Date: 2008-12-17
XINXIANG LIANDA HUAZHONG POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But their drawback is that the theoretical gram capacity of calcium zincate is very low, as Ca(OH) 2 Mixing with ZnO to make zinc anode or directly using calcium zincate as the anode active material will significantly reduce the capacity of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0011] A preparation method for a zinc negative electrode of a secondary zinc-nickel battery has the following steps:

[0012] (1) 70.5-80.5 parts by weight of zinc oxide whose surface is coated with oxide, 3-5 parts by weight of conductive agent and other compounds of zinc and metal compound additives of 13-35 parts by weight if necessary and 0.5- 1 weight part of the hydrophilic binder powder is mechanically mixed to obtain a negative electrode active material and a hydrophilic binder semi-finished mixture;

[0013] (2) dissolving the dispersant of 0.01-3 parts by weight in distilled water of 15-30 parts by weight;

[0014] (3) Add the mixture of negative electrode active material and hydrophilic binder semi-finished product obtained in step (1) to the solution obtained in step (2), and then add hydrophobic binder with a dry basis amount of 0.5-3 parts by weight under stirring. agent emulsion to obtain a uniform zinc negative electrode slurry fluid;

[0015] (4) Coating th...

Embodiment approach 1

[0018] 1 part by weight of soluble SnCl 2 2H 2 O was dissolved in 10 parts by weight of concentrated hydrochloric acid, diluted 20 times with distilled water, and then 99 parts by weight of zinc oxide was added under the condition of mechanical stirring, and stirred for 0.5-5 hours. Sn-coated surface can be prepared by drying 6 o 4 (OH) 4 of zinc oxide powder. Then put 0.02g of sodium tripolyphosphate in the beaker, add 28g of deionized water, place the beaker on an electric heating stirrer and stir slowly, after the sodium tripolyphosphate is completely dissolved, add 100g of calcium zincate, zinc powder and By Sn 6 o 4 (OH) 4 Coated zinc oxide, 2g of conductive graphite, 0.03g of carbon black and 1.0g of sodium carboxymethyl cellulose powder are uniformly mixed, added to the above beaker, fully stirred, and then 1.5g of styrene-butadiene rubber emulsion with a concentration of 50% is added , stirred to obtain a uniform negative electrode active material slurry, and t...

Embodiment approach 2

[0020] 10 parts by weight of soluble SnCl 2 2H 2 O was dissolved in 10 parts by weight of concentrated hydrochloric acid, diluted 20 times with distilled water, and then 90 parts by weight of zinc oxide was added under the condition of mechanical stirring, and stirred for 0.5-5 hours. Sn-coated surface can be prepared by drying 6 o 4 (OH) 4 of zinc oxide. Then put 0.02g of sodium tripolyphosphate in the beaker, add 28g of deionized water, place the beaker on an electric heating stirrer and heat and stir slowly. After the sodium tripolyphosphate is completely dissolved, add 100g of calcium zincate and zinc powder and by Sn 6 o 4 (OH) 4 Coated zinc oxide, 2g of conductive graphite, 0.03g of carbon black and 1.0g of sodium carboxymethyl cellulose powder are uniformly mixed, added to the above beaker, fully stirred, and then 1.5g of styrene-butadiene rubber emulsion with a concentration of 50% is added , stirred to obtain a uniform negative electrode active material slurry...

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PUM

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Abstract

The invention discloses a zinc cathode of zinc / nickel secondary batteries and a method for coating the surface of zinc oxide with an oxide, and relates to a cathode of secondary batteries. The method aims to design the zinc cathode of the zinc / nickel secondary batteries and the method for coating the surface of the zinc oxide with the oxide, wherein the zinc cathode and the method can relieve the corrosive dissolution of zinc, reduce the deformation of electrodes and prolong the cyclic service life of the zinc / nickel batteries. The technical proposal mainly lies in that: the zinc cathode of the zinc / nickel secondary batteries comprises a current collector and an active substance applied on the surface of the current collector. The active substance further contains the zinc oxide, the surface of which is coated with Sn6O4(OH)4. The zinc cathode is applicable to the zinc / nickel secondary batteries.

Description

Technical field: [0001] The invention relates to a negative electrode of a secondary battery, in particular to a zinc negative electrode of a zinc-nickel secondary battery and a method for coating oxide on the surface of zinc oxide. Background technique: [0002] Among the alkaline secondary batteries with zinc as the anode, the advantages of Zn-Ni batteries, such as high operating voltage and high current charge and discharge, have attracted widespread attention in recent years. Zinc-nickel batteries with a high open circuit voltage of 1.65V are more suitable for various small electric tools, Power supply for electric vacuum cleaners, electric bicycles, etc. However, the disadvantage of the rechargeable zinc-nickel battery with zinc as the negative electrode is that during the discharge process of the battery, zinc dissolves into the electrolyte solution, but the zincate has a relatively high density and tends to sink. It is deposited on the lower part of the electrode, c...

Claims

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Application Information

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IPC IPC(8): H01M4/24H01M4/48B22F1/02B22F9/00H01M4/38H01M4/62
CPCY02E60/10
Inventor 申松胜王学文杨占红胡俊赵玉斌廖建平王升威
Owner XINXIANG LIANDA HUAZHONG POWER SUPPLY