Preparation method of hydrogel electrolyte for aqueous zinc ion energy storage battery

A technology for energy storage batteries and hydrogels, which is applied in the field of preparation of hydrogel electrolytes for water-based zinc-ion energy storage batteries. Chemical properties and other issues, to achieve fast and easy performance, high yield, good stretching and bending effects

Pending Publication Date: 2021-12-10
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the existing aqueous zinc-ion battery gel electrolytes have shortcomings in specific capacity and rate performance, and the assembled aqueous zinc-ion battery is difficult to achieve relatively ex

Method used

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  • Preparation method of hydrogel electrolyte for aqueous zinc ion energy storage battery
  • Preparation method of hydrogel electrolyte for aqueous zinc ion energy storage battery
  • Preparation method of hydrogel electrolyte for aqueous zinc ion energy storage battery

Examples

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[0027] Example 1

[0028] The polyacrylamide was added 2g 10ml concentration of 4mol / kg Zn (ClO 4 ) 2 Solution and stirred until dissolved to obtain a solution A; 3mg successively added methylene bis-acrylamide and ammonium persulfate to 2mg solution A was thoroughly stirred and heated at 60 ℃ 30min to give a hydrogel forming B; hydrogel B at a concentration of 4mol / kg of Zn (ClO 4 ) 2 Solution soak 20min, to give an aqueous hydrogel of zinc ion storage battery electrolyte. The above-obtained aqueous gel electrolyte is a porous structure, a pore size of 100-500nm. Aqueous gel electrolyte tensile elongation of 700%, water absorption was 400%.

Example Embodiment

[0029] Example 2

[0030] The polyacrylamide was added 2g 10ml concentration of 4mol / kg of ZnSO 4 Solution and stirred until dissolved to obtain a solution A; 3mg successively added methylene bis-acrylamide and ammonium persulfate to 2mg solution A was thoroughly stirred and heated at 60 ℃ 30min to give a hydrogel forming B; hydrogel B at a concentration of 4mol / kg of ZnSO 4 Solution soak 20min, to give an aqueous hydrogel of zinc ion storage battery electrolyte. The above-obtained aqueous gel electrolyte is a porous structure, a pore size of 200-800nm. Tensile elongation aqueous gel electrolyte 400%, water absorption was 200%.

Example Embodiment

[0031] Example 3

[0032] The polyacrylamide was added 1g 10ml concentration of 3mol / kg of Zn (ClO 4 ) 2 Solution and stirred until dissolved to obtain a solution A; 2mg successively added methylene bis-acrylamide and ammonium persulfate to 1mg solution A was thoroughly stirred and heated at 80 ℃ 60min to give a hydrogel forming B; hydrogel B at a concentration of 3mol / kg of Zn (ClO 4 ) 2 Solution soak 20min, to give an aqueous hydrogel of zinc ion storage battery electrolyte. The above-obtained aqueous gel electrolyte is a porous structure, a pore size of 100-500nm. Aqueous gel electrolyte tensile elongation of 600%, water absorption was 300%.

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Abstract

The invention discloses a preparation method of a hydrogel electrolyte for an aqueous zinc ion energy storage battery, which comprises the steps of S1, adding polyacrylamide into a zinc salt aqueous solution, and stirring until the polyacrylamide is dissolved to obtain a solution A; S2, sequentially adding a cross-linking agent and an initiator into the solution A, fully stirring, and heating and forming to obtain hydrogel B; and S3, soaking the hydrogel B in a zinc salt aqueous solution to obtain the hydrogel electrolyte. The zinc salt aqueous solution is a zinc perchlorate aqueous solution, a zinc sulfate aqueous solution or a mixture thereof. The zinc salt hydrogel electrolyte prepared by the preparation method disclosed by the invention not only has relatively good mechanical properties such as stretching and bending, and relatively good temperature-resistant use performance, but also has obviously improved electrochemical properties such as specific capacity and rapid charge and discharge, and can be applied to high-performance zinc ion energy storage batteries.

Description

technical field [0001] The invention relates to the technical field of preparation of aqueous zinc-ion battery electrolytes, in particular to a preparation method of a water-based zinc-ion energy storage battery hydrogel electrolyte. Background technique [0002] In recent years, the shortage of fossil fuels and environmental pollution have become increasingly serious, and people's demand for energy storage devices has become increasingly urgent. At present, lithium-ion batteries and lead-acid batteries are widely used, but considering the environmental pollution of their resources and organic electrolytes , the aqueous zinc-ion battery has significant advantages, it has the advantages of non-toxic, less pollution, and low cost. [0003] There are mainly two types of electrolytes for aqueous zinc-ion batteries: liquid electrolytes and gel electrolytes. Gel electrolytes can be assembled without a diaphragm, making up for the defects of liquid electrolytes, preventing puncture...

Claims

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Application Information

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IPC IPC(8): H01M10/38H01M10/36
CPCH01M10/38H01M10/36H01M2300/0085H01M2300/0088Y02E60/10Y02P70/50
Inventor 胡林华韦婷婷李兆乾
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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