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Preparation method of high-toughness gel electrolyte and all-solid-state zinc-air battery with firm interface

A gel electrolyte and high toughness technology, applied in the field of energy storage devices, can solve the problems of reducing the performance of flexible batteries, achieve the effect of reducing battery polarization and interface contact resistance

Active Publication Date: 2021-06-01
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional sandwich battery configurations inevitably suffer from relative displacement or separation between two adjacent components under bending strain, which severely degrades the performance of flexible batteries.

Method used

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  • Preparation method of high-toughness gel electrolyte and all-solid-state zinc-air battery with firm interface
  • Preparation method of high-toughness gel electrolyte and all-solid-state zinc-air battery with firm interface
  • Preparation method of high-toughness gel electrolyte and all-solid-state zinc-air battery with firm interface

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Embodiment 1

[0031] 1. Preparation of carbon cloth air electrode

[0032] The air electrode is composed of nine cobalt octasulfide powder loaded on carbon cloth. Wash and dry the carbon cloth with alcohol and deionized water. The electrode slurry is prepared from nine cobalt octasulfide powder, conductive carbon black, deionized water, isopropanol and Nafion solution. The catalyst slurry prepared by ultrasonication for 30min was uniformly coated on the cleaned carbon cloth, and the loading capacity was about 1 mg cm -2 . Subsequently, the prepared air electrode was dried overnight at room temperature. The prepared carbon cloth air electrode can be obtained.

[0033] 2. Electrolyte preparation

[0034] PAA-Fe 3+ / CS hydrogel: first weigh 1-2g chitosan and dissolve it in the aqueous solution, and stir it magnetically at room temperature. Acrylic acid (AA, 10-20g), crosslinker N,N'-methylenebisacrylamide (MBA, 90ul, 20mg / mL) and ferric chloride hexahydrate (FeCl 3 6H2O, 1 g) was stirre...

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Abstract

The invention discloses a high-toughness gel electrolyte. Specifically, an original weak PAA-Fe<3+> / CS hydrogel is soaked in a salt solution by utilizing a Hofmeister effect, and the toughness-enhanced PAA-Fe<3+> / CS hydrogel electrolyte with excellent mechanical properties is prepared. Ammonium chloride and zinc chloride are used as ionic conductors in an electrolyte, polyacrylic acid is used as a polymer skeleton, ammonium persulfate is used as an initiator, in the presence of chitosan and ferric chloride, PAA-Fe<3+> / CS hydrogel is prepared through one-pot free radical polymerization, after a PAA-Fe<3+> network is constructed, chain entanglement of chitosan is induced by adopting a soaking strategy, and the high-toughness electrolyte for an zinc-air battery is obtained. The electrolyte has high toughness, can be assembled into a battery to avoid relative displacement or separation caused by bending strain, enhances interface contact to promote electrochemical kinetics, and shows good working time and durability.

Description

technical field [0001] The invention belongs to the field of energy storage devices, and more specifically relates to a preparation method of a high-toughness gel electrolyte and an all-solid-state zinc-air battery with a firm interface. Background technique [0002] Zn-air batteries have been studied as promising new energy devices because of their low cost, environmental friendliness, and high energy density. It is increasingly attractive to explore solid-state Zn-air batteries with high flexibility and intrinsic safety. Solid-state zinc-air batteries can meet the requirements of wearable and stretchable electronics, and traditional zinc-air batteries consist of zinc electrodes, electrolytes, and air electrodes. However, conventional sandwich battery configurations inevitably suffer from relative displacement or separation between two adjacent components under bending strain, which severely degrades the performance of flexible batteries. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): H01M12/06
CPCH01M12/06H01M2300/0091H01M2300/0085Y02E60/10
Inventor 吴明在汤坤胡海波
Owner ANHUI UNIVERSITY
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