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Negative pole piece of zinc secondary battery as well as preparation method and application of negative pole piece

A technology of negative pole piece and secondary battery, applied in battery electrodes, alkaline storage battery electrodes, alkaline storage batteries, etc., can solve the problems of increased cost, harsh production conditions, reduced electrode polarization, etc., to improve cycle performance and safety properties, simple preparation method, and the effect of inhibiting side reactions

Active Publication Date: 2021-06-29
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The negative electrode protection layer has a high specific surface area, uniform zinc deposition morphology and excellent conductivity, which can reduce the polarization of the electrode and effectively inhibit the growth of zinc dendrites, effectively improving the electrochemical performance of zinc ion batteries, but the negative electrode material The MOF derivatives in the protective layer need to be calcined under the protection of nitrogen, the production conditions are harsh, the cost increases, and the negative electrode cannot be well prevented from hydrogen evolution reaction, and it is easy to be corroded

Method used

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  • Negative pole piece of zinc secondary battery as well as preparation method and application of negative pole piece
  • Negative pole piece of zinc secondary battery as well as preparation method and application of negative pole piece
  • Negative pole piece of zinc secondary battery as well as preparation method and application of negative pole piece

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Embodiment 1

[0050] The present embodiment provides a negative electrode sheet of a zinc secondary battery, the negative electrode sheet includes a zinc sheet and a protective layer arranged on the surface of the zinc sheet; the protective layer includes a chitosan hydrogel film and is dispersed in Zinc bistrifluoromethylsulfonylimide in a hydrogel film with a protective layer of 7 μm in thickness.

[0051] The preparation method of the negative electrode sheet is as follows:

[0052] First take quantitative bistrifluoromethylsulfonylimide zinc and chitosan powder with analytical balance, join in the dilute solution (volume ratio, formic acid: water=1:100) of formic acid, be configured to contain 20mg / mL Chitosan, the gel of 0.05mol / L bistrifluoromethylsulfonylimide zinc, placed on a magnetic stirrer and stirred for 30min to promote the dissolution of chitosan, to obtain a hydrogel; pipette the hydrogel Glue on the zinc sheet, and then use a four-sided preparation device with a set thickn...

Embodiment 2

[0055] This embodiment provides a negative pole piece of a zinc secondary battery, which differs from Example 1 only in that the zinc salt in the protective layer is zinc bistrifluoromethanesulfonate; other materials, dosages and preparation methods are the same as those in Example 1. Example 1 is the same.

Embodiment 3

[0057] The present embodiment provides a negative electrode sheet of a zinc secondary battery, the negative electrode sheet includes a zinc sheet and a protective layer arranged on the surface of the substrate; the protective layer includes a chitosan hydrogel film and is dispersed in Two zinc trifluoromethylsulfonylimides in the hydrogel film, the thickness of the protective layer is 7 μm; the difference between its preparation method and Example 1 is that the mass concentration of chitosan in the hydrogel is 30mg / mL .

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Abstract

The invention provides a negative pole piece of a zinc secondary battery as well as a preparation method and application of the negative pole piece. The negative pole piece comprises a zinc-containing metal substrate and a protective layer arranged on the surface of the zinc-containing metal substrate, wherein the protective layer comprises a hydrogel film and a zinc salt dispersed in the hydrogel film. The preparation method comprises the following steps of: (1) mixing a gel polymer, zinc salt and a solvent to obtain hydrogel dispersed with the zinc salt; and (2) coating a zinc-containing metal substrate with the hydrogel obtained in the step (1), and drying to obtain the negative pole piece. The negative pole piece provided by the invention has the advantages of uniform zinc deposition, corrosion resistance, good cyclicity, high safety and the like, and is an excellent choice of a negative electrode material in a zinc secondary battery.

Description

technical field [0001] The invention belongs to the technical field of zinc secondary batteries, and in particular relates to a negative pole piece of a zinc secondary battery and a preparation method and application thereof. Background technique [0002] Among the existing energy storage technologies, electrochemical energy storage technology is considered to be the most promising energy storage technology due to its characteristics of high efficiency, long life, strong flexibility and low maintenance cost. Among them, batteries have become an excellent integrated energy storage technology for renewable energy due to their long cycle life, high power and energy density, simple maintenance, and high efficiency and convenience. At present, the most widely promoted lithium-ion battery on the market has hindered its development because the organic electrolyte used in its electrolyte is usually toxic and flammable. In recent years, aqueous zinc-ion batteries (ZIBs) have been co...

Claims

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Application Information

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IPC IPC(8): H01M4/24H01M4/26H01M10/24
CPCH01M4/244H01M4/26H01M10/24Y02E60/10
Inventor 穆延璐葛广路张双玢周天易
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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