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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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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 excellent electrochemical performance, especially fast charge and discharge performance, which restricts the ability of aqueous zinc-ion batteries Expansion of the field of application of zinc-ion batteries

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

Experimental program
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Effect test

Embodiment 1

[0028] Add 2g polyacrylamide to 10ml concentration and be 4mol / kg Zn(ClO 4 ) 2 In the solution, stir until dissolved to obtain solution A; add 3 mg methylene bisacrylamide and 2 mg ammonium persulfate to solution A in sequence, after stirring thoroughly, heat at 60°C for 30 minutes to form hydrogel B; hydrogel B At a concentration of 4mol / kg Zn(ClO 4 ) 2 soaking in the solution for 20 minutes to obtain a hydrogel electrolyte for a water-based zinc ion energy storage battery. The hydrogel electrolyte prepared above has a porous structure with a pore diameter of 100-500 nm. The hydrogel electrolyte has a tensile elongation of 700% and a water absorption of 400%.

Embodiment 2

[0030] Add 2g of polyacrylamide to 10ml of ZnSO with a concentration of 4mol / kg 4 In the solution, stir until dissolved to obtain solution A; add 3 mg methylene bisacrylamide and 2 mg ammonium persulfate to solution A in sequence, after stirring thoroughly, heat at 60°C for 30 minutes to form hydrogel B; hydrogel B At a concentration of 4mol / kg ZnSO 4 soaking in the solution for 20 minutes to obtain a hydrogel electrolyte for a water-based zinc ion energy storage battery. The hydrogel electrolyte prepared above has a porous structure with a pore diameter of 200-800 nm. The hydrogel electrolyte has a tensile elongation of 400% and a water absorption of 200%.

Embodiment 3

[0032] Add 1g of polyacrylamide to 10ml concentration of 3mol / kg Zn(ClO 4 ) 2 In the solution, stir until dissolved to obtain solution A; add 2mg methylene bisacrylamide and 1mg ammonium persulfate to solution A in sequence, after stirring fully, heat at 80°C for 60min to form hydrogel B; hydrogel B At a concentration of 3mol / kg Zn(ClO 4 ) 2 soaking in the solution for 20 minutes to obtain a hydrogel electrolyte for a water-based zinc ion energy storage battery. The hydrogel electrolyte prepared above has a porous structure with a pore diameter of 100-500 nm. The hydrogel electrolyte has a tensile elongation of 600% and a water absorption of 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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