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Flexible zinc-air battery gel electrolyte as well as preparation method and application thereof

A gel electrolyte, air battery technology, applied in electrolytes, solid electrolytes, non-aqueous electrolytes, etc., can solve the problems of failing to meet the requirements of wearable electronic products, destroying polymers, and degrading the mechanical properties of gels. Glue ion conductivity, good hydrophilicity, and the effect of improving adsorption rate

Inactive Publication Date: 2021-03-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Strong alkali usually destroys the interaction between polymers and changes its structure, which reduces the original mechanical properties of the gel and cannot meet the requirements of wearable electronic products.

Method used

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  • Flexible zinc-air battery gel electrolyte as well as preparation method and application thereof
  • Flexible zinc-air battery gel electrolyte as well as preparation method and application thereof
  • Flexible zinc-air battery gel electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of the flexible zinc-air battery gel electrolyte of the present invention comprises the following steps:

[0038] (1) After adding 1.5 g of acrylic acid into 2.0 g of ultrapure water and fully stirring, slowly add 0.8 g of sodium hydroxide with a concentration of 20 mol / L dropwise in an ice bath, and vigorously stir and mix.

[0039] (2) Add 0.01g of sodium lignosulfonate, 0.002g of N,N'-methylenebisacrylamide and 0.02g of potassium persulfate to the above solution in sequence, stir for 30min and then ultrasonically remove the foam.

[0040] (3) The above mixed solution was poured into a glass mold with a 2 mm thick silica gel pad, sealed and placed in a blast oven at 60° C. for 3 hours to obtain a polymer gel film.

[0041] (4) Soak the prepared polymer gel film in 20 mL of strong alkaline electrolyte containing 6 mol / L potassium hydroxide and 0.2 mol / L zinc acetate for 24 hours to obtain a polymer gel electrolyte with high ionic conductivity.

[...

Embodiment 2

[0044] A preparation method of the flexible zinc-air battery gel electrolyte of the present invention comprises the following steps:

[0045] (1) After adding 1.5 g of acrylic acid into 2.0 g of ultrapure water and fully stirring, slowly add 0.8 g of sodium hydroxide with a concentration of 20 mol / L dropwise in an ice bath, and vigorously stir and mix.

[0046] (2) Add 0.02g sodium lignosulfonate, 0.002g N,N'-methylenebisacrylamide and 0.02g potassium persulfate to the above solution in sequence, stir for 30min and then ultrasonically remove the foam.

[0047] (3) The above mixed solution was poured into a glass mold with a 2 mm thick silica gel pad, sealed and placed in a blast oven at 60° C. for 3 hours to obtain a polymer gel film.

[0048](4) Soak the worthwhile polymer gel film in 20 mL of strong alkaline electrolyte containing 6 mol / L potassium hydroxide and 0.2 mol / L zinc acetate for 24 hours to obtain a polymer gel electrolyte with high ionic conductivity.

[0049] Th...

Embodiment 3

[0051] A preparation method of the flexible zinc-air battery gel electrolyte of the present invention comprises the following steps:

[0052] (1) After adding 1.5 g of acrylic acid into 2.0 g of ultrapure water and fully stirring, slowly add 0.8 g of sodium hydroxide with a concentration of 20 mol / L dropwise in an ice bath, and vigorously stir and mix.

[0053] (2) Add 0.03g of sodium lignosulfonate, 0.002g of N,N'-methylenebisacrylamide and 0.02g of potassium persulfate to the above solution in sequence, stir for 30min and then ultrasonically remove the foam.

[0054] (3) The above mixed solution was poured into a glass mold with a 2 mm thick silica gel pad, sealed and placed in a blast oven at 60° C. for 3 hours to obtain a polymer gel film.

[0055] (4) Soak the prepared polymer gel film in 20 mL of strong alkaline electrolyte containing 6 mol / L potassium hydroxide and 0.2 mol / L zinc acetate for 24 hours to obtain a polymer gel electrolyte with high ionic conductivity.

[...

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Abstract

The invention discloses a flexible zinc-air battery gel electrolyte as well as a preparation method and application thereof, and the gel electrolyte comprises the following components in percentage bymass: 15%-30% of acrylic acid, 9%-18% of sodium hydroxide, 0.2%-1% of lignosulfonate, 1%-8% of electrolyte, 0.01%-0.05% of cross-linking agent, 0.1%-0.5% of initiator and the balance of water, wherein the acrylic acid, the sodium hydroxide, the lignosulfonate, the electrolyte, the cross-linking agent, the initiator and the water form a hydrogel system together. The gel electrolyte of the flexiblezinc-air battery is good in mechanical property and good in cycling stability in a strong alkali environment.

Description

technical field [0001] The invention relates to the technical field of zinc-air batteries, in particular to a flexible zinc-air battery gel electrolyte and its preparation method and application. Background technique [0002] With the development and prosperity of flexible and wearable electronic products, it is imperative to produce flexible energy storage devices with high energy density, reliability and safety. Among various energy storage technologies, Zn-air batteries are the most popular due to their low cost, environmental friendliness and high theoretical energy density (1084Whkg -1 ) is considered to be one of the new energy storage devices with great development potential. However, the traditional zinc-air batteries have problems such as leakage of alkaline electrolyte after packaging, poor conductivity of solid electrolytes, and reduced cycle life, which are still challenges that cannot be ignored on the road to commercialization of zinc-air batteries. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/08
CPCH01M12/08H01M2300/0082H01M2300/0085H01M2300/0091
Inventor 张翼张玉媛陈阳谭云雷雨来
Owner CENT SOUTH UNIV
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