Zinc cathode and preparation method thereof as well as zinc secondary battery using zinc cathode

A zinc anode and cathode technology, which is applied to battery electrodes, alkaline storage batteries, alkaline storage battery electrodes, etc., can solve the problems of low discharge platform and inability to meet, and achieve the effects of improving discharge platform, reducing battery internal resistance, and simple preparation.

Inactive Publication Date: 2010-06-16
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to overcome the defect that the nickel-zinc battery made by the zinc negative electrode of the prior art has a relatively low discharge platform during high-current discharge and cann

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] The preparation method of the zinc negative electrode of the present invention comprises coating the negative electrode slurry containing the negative electrode active material, the negative electrode binder and the solvent on the current collector, drying, calendering or not calendering, wherein the negative electrode active material is a surface-coated Zinc-containing material particles covered with hydrophobic silicone resin, the zinc-containing material particles are selected from one or more of zinc compounds, zinc alloys and zinc simple substances; the negative electrode binder is a hydrophilic binder.

[0023] The preparation method of the zinc-containing substance particles coated with hydrophobic silicone resin includes contacting the zinc-containing substance particles with a hydrophobic silicone resin solution, and separating the zinc-containing substance particles after contacting with the hydrophobic silicone resin solution; in order to make the hydrophobic s...

Example Embodiment

[0036] Example 1

[0037] This example illustrates the zinc negative electrode provided by the present invention, the zinc-nickel secondary battery using the zinc negative electrode and their preparation methods.

[0038] (1) Preparation of diaphragm

[0039] A piece of vinylon felt with a length of 450 mm, a width of 35.5 mm, and a thickness of 0.10 mm was laminated with a piece of wettable polypropylene microporous membrane with a length of 450 mm, width of 35.5 mm, and a thickness of 0.025 mm, and welded to form a diaphragm. Repeat this step to prepare 10 septa.

[0040] (2) Preparation of nickel positive electrode

[0041] 386 grams of spherical nickel hydroxide, 28 grams of cobaltous oxide, 44 grams of conductive carbon black and 12 grams of PTFE, 0.8 grams of CMC and 208 grams of deionized water were stirred into a slurry and coated on the foam welded with the positive current collector. On the nickel, after drying, rolling, and cutting into pieces, 10 nickel positive...

Example Embodiment

[0050] Example 2

[0051] This example illustrates the zinc negative electrode provided by the present invention, the zinc-nickel secondary battery using the zinc negative electrode and their preparation methods.

[0052] Prepare zinc negative electrode and secondary zinc-nickel battery according to the same method as in Example 1, the difference is that step (3) is: 5.2 grams of ethyl orthosilicate, 6.91 grams of octyltriethoxysilane and 13.35 grams of ten Add dialkyltrimethoxysilane into a four-necked flask and mix, add 250 grams of ethanol, stir evenly, then heat up to 70°C, add 3.6 grams of 0.01 mole / liter hydrochloric acid solution, react for 3 hours, and neutralize with ethanolamine until neutral. After cooling down to room temperature, a hydrophobic silicone resin solution with a solid solution concentration of 9.2% by weight is obtained; step (4) is: mixing and stirring 237.5 grams of zinc oxide powder with 29 grams of the above-mentioned hydrophobic silicone resin sol...

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Abstract

The invention relates to a zinc cathode which comprises a current collector and a cathode material, wherein the cathode material is attached to the current collector and comprises a cathode active substance and cathode adhesive; the cathode active substance is zinc-contained substance particles of which the surface is coated with hydrophobic silicon resin; the zinc-contained substance particles are selected from one or more of zinc compounds, zinc alloy and zinc elementary substances; and the cathode adhesive is hydrophilic adhesive. The secondary zinc-nickel battery prepared by the zinc cathode has lower internal resistance; and when large current discharge is carried out, a discharge platform is high, and the requirement of a product needing a high discharge platform can be favorably met.

Description

technical field [0001] The invention relates to a negative electrode of an alkaline secondary battery, a preparation method thereof and an alkaline secondary battery using the negative electrode, in particular to a zinc negative electrode, a preparation method thereof and a zinc secondary battery using the zinc negative electrode. Background technique [0002] A zinc secondary battery generally includes a pole core and an alkaline electrolyte, and the pole core includes a positive electrode, a zinc negative electrode and a separator between the positive electrode and the zinc negative electrode. Various zinc secondary batteries can be formed by choosing different positive electrodes, such as zinc-silver battery, zinc-nickel battery, zinc-air battery, zinc-manganese battery, etc. Among them, zinc-nickel batteries have excellent performance and are widely used. [0003] The negative electrode active material of the secondary zinc-nickel battery is zinc powder or zinc alloy po...

Claims

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Application Information

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IPC IPC(8): H01M4/24H01M4/60H01M4/62H01M10/24
CPCY02E60/124Y02E60/10
Inventor 朱志坚韩鹏飞肖鑫
Owner BYD CO LTD
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