Long-cycle-life aqueous zinc secondary battery negative electrode and preparation and application thereof

A secondary battery and negative electrode technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of reducing the cycle life of zinc secondary batteries, side reaction dendrite growth, etc., to inhibit the growth of metal dendrites and improve the cycle. Life, the effect of optimizing the diffusion path

Inactive Publication Date: 2021-02-05
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the technical problem that the zinc metal battery has side reactions and dendrite growth between the active metal zinc and the electrolyte in the prior art, thereby reducing the cycle life of the zinc secondary battery

Method used

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  • Long-cycle-life aqueous zinc secondary battery negative electrode and preparation and application thereof
  • Long-cycle-life aqueous zinc secondary battery negative electrode and preparation and application thereof
  • Long-cycle-life aqueous zinc secondary battery negative electrode and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The zinc / basic indium sulfate electrode material was prepared by the following chemical displacement reaction method:

[0054] A. configuration reaction solution, the dilute hydrochloric acid that concentration is 0.1mol / L, the indium chloride ethanol solution that concentration is 0.1mol / L, the zinc sulfate aqueous solution that concentration is 3mol / L.

[0055] B. Pretreat the commercial polycrystalline metal zinc foil, ultrasonically clean it in 0.1mol / L dilute hydrochloric acid and deionized water for 2 minutes, and then immerse the pretreated zinc foil in the 0.1mol / L indium chloride ethanol solution of step A , stirred and reacted at normal temperature and pressure for 10 minutes, then taken out, washed and dried to obtain a zinc / indium precursor material.

[0056] C. Assembling the zinc / indium precursor material obtained in step B into a symmetrical battery, using the 3 mol / L zinc sulfate aqueous solution in step A as the electrolyte, and the glass fiber as the d...

Embodiment 2

[0067] The zinc / tin hydroxide electrode material was prepared by the following chemical displacement reaction method:

[0068] A. configuration reaction solution, the dilute hydrochloric acid that concentration is 0.1mol / L, the tin chloride ethanol solution that concentration is 0.1mol / L, the potassium hydroxide aqueous solution that concentration is 6mol / L.

[0069] B. Pretreat the commercial polycrystalline metal zinc foil, ultrasonically clean it in 0.1mol / L dilute hydrochloric acid and deionized water for 2 minutes, and then immerse the pretreated zinc foil in the 0.1mol / L tin chloride ethanol of step A The solution was stirred and reacted at normal temperature and pressure for 10 minutes, then taken out, washed and dried to obtain a zinc / tin precursor material.

[0070] C. Assembling the zinc / tin precursor material obtained in step B into a symmetrical battery, using the 6 mol / L potassium hydroxide aqueous solution in step A as the electrolyte, and the glass fiber as the ...

Embodiment 3

[0075] The zinc / alumina electrode material was prepared by the following chemical displacement reaction method:

[0076] A. configuration reaction solution, the dilute hydrochloric acid that concentration is 0.1mol / L, the aluminum chloride aqueous solution that concentration is 0.05mol / L, the zinc sulfate aqueous solution that concentration is 3mol / L.

[0077] B. Carry out pretreatment to commercial polycrystalline metal zinc foil, ultrasonically clean 2 minutes in 0.1mol / L dilute hydrochloric acid and deionized water, then immerse the pretreated zinc foil in the 0.05mol / L aluminum chloride aqueous solution of step A, After being stirred and reacted for 10 minutes at normal temperature and pressure, it was taken out, washed and dried to obtain a zinc / aluminum precursor material.

[0078] C. Assembling the zinc / aluminum precursor material obtained in step B into a symmetrical battery, using the 3 mol / L zinc sulfate aqueous solution in step A as the electrolyte, and the glass fi...

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Abstract

The invention discloses a preparation method of a long-cycle-life aqueous zinc secondary battery negative electrode, and belongs to the technical field of zinc secondary batteries. The preparation method comprises the following steps: firstly, carrying out chemical replacement reaction on zinc and metal salt to deposit a metal simple substance on the zinc metal surface and further to obtain a zincmetal surface covered solid electrolyte precursor; covering a solid electrolyte precursor on the surface of zinc metal to serve as a negative electrode to assemble a battery; and after the solid electrolyte precursor material is subjected to in-situ electrochemical cycle activation, generating solid electrolyteon the surface of zinc metal in situ, and obtaining the zinc secondary battery negativeelectrode material. The obtained zinc/solid electrolyte electrode has a large actual electrochemical active area and high mechanical stability, and meanwhile, the solid electrolyte isolates zinc metal from liquid electrolyte, so that the defects of active metal corrosion, surface passivation, dendritic crystal growth and the like of a traditional zinc metal electrode are inhibited, and the cycling stability of an electrode material is improved.

Description

technical field [0001] The invention belongs to the technical field of zinc secondary batteries, and more specifically relates to a method for preparing a negative electrode of a long-cycle-life aqueous zinc secondary battery. Background technique [0002] Renewable energy such as solar energy, wind energy, and tidal energy is widely distributed, but its regional and intermittent shortcomings severely limit the utilization and promotion of clean energy. The development of electric energy storage technology is a top priority. Metal secondary batteries (such as zinc metal batteries, etc.) are one of the most promising next-generation high-energy-density energy storage devices, and have good application prospects in renewable energy storage, grid energy storage, and other fields. However, the side reactions between the active metal zinc and the electrolyte, dendrite growth and other problems reduce the cycle life of zinc secondary batteries and severely limit the practical appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/38
CPCH01M10/36H01M10/365H01M10/38Y02E60/10Y02P70/50
Inventor 孙永明蔡钊欧阳涛
Owner HUAZHONG UNIV OF SCI & TECH
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