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Zinc electrode, and preparation method and application thereof

A zinc electrode and zinc flake technology, which is applied in electrode manufacturing, battery electrodes, electrode heat treatment, etc., can solve the problems of short cycle life of electrodes and batteries

Inactive Publication Date: 2021-06-01
上海簇睿低碳能源技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the cycle life of the electrode and the battery is short due to zinc electrode self-corrosion, dendrite growth and passivation of the rechargeable zinc-air battery

Method used

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  • Zinc electrode, and preparation method and application thereof
  • Zinc electrode, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A long-life zinc electrode preparation method:

[0024] 1) Weigh 15 mg of polyaniline and 15 mg of polyvinylidene fluoride into a mortar and grind for 15 minutes.

[0025] 2) Add 30 mL of N-methylpyrrolidone as a dispersant to the mixed powder obtained in step 1), and continue grinding for 30 min.

[0026] 3) After polishing the zinc sheet with sandpaper, wash it in ethanol and dry it at room temperature.

[0027] 4) Coating the slurry obtained by grinding on the zinc flakes cleaned in step 3) with a scraper, and putting the mixed solution into an oven at 120° C. for vacuum drying for 10 h to obtain polyaniline-coated zinc flakes.

[0028] figure 1 For the scanning electron microscope topography of the polyaniline material prepared in this example, the microstructure of the polyaniline material of the present invention was characterized using a field emission electron microscope. Regularly shaped particles can be seen under a high-power electron microscope.

[0029]...

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Abstract

The invention discloses a zinc electrode and a preparation method thereof, and application of the zinc electrode in a chargeable and dischargeable zinc air battery. The zinc electrode comprises a zinc sheet, wherein the zinc sheet is coated with a coating prepared from a coating material, a binder and a dispersant, and the coating material is polyaniline. The preparation method comprises the following steps: grinding and mixing the coating material and the binder; adding the dispersant into the mixture, and continuously grinding to obtain polyaniline slurry; and coating the zinc sheet with the polyaniline slurry by using a scraper, then carrying out vacuum drying, and conducting cooling to obtain the polyaniline coating modified zinc electrode. The preparation method is simple in process, low in cost and good in controllability, the obtained polyaniline coating modified zinc sheet can effectively improve the utilization rate and reversibility of a zinc electrode, the hydrogen evolution reaction rate of the zinc electrode is reduced, the cycle life of the zinc electrode is prolonged, and the polyaniline coating modified zinc sheet has good application prospects in the related fields of electro-catalysis and secondary zinc air batteries.

Description

technical field [0001] The invention relates to the preparation and application of a zinc electrode, which is mainly used in the technical field of electrocatalysis under alkaline conditions, specifically in the technical field of zinc-air batteries, and belongs to the technical field of preparation and application of energy materials. Background technique [0002] With the rapid economic development, people's demand for various power sources is also increasing. Therefore, the development of high specific energy and clean and safe energy storage batteries has become an important demand for social development. Among them, the zinc-air battery does not use heavy metals due to its environmental protection, and the electrolyte is also a water phase system, which basically has no pollution to the environment. In addition, zinc-air batteries also have high specific energy (theoretical energy density is 1350Wh kg -1 ), good safety performance and simple battery structure. Rechar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M4/02H01M4/04H01M12/08
CPCH01M10/4235H01M4/0409H01M4/0471H01M4/02H01M12/08Y02E60/10
Inventor 孙予罕钱婧王慧曾高峰范义秋徐庆杨阳赵唱刘一健
Owner 上海簇睿低碳能源技术有限公司
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