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Electrolyte for zinc secondary battery as well as preparation method and application thereof

A secondary battery and electrolyte technology, applied to secondary batteries, aqueous electrolytes, circuits, etc., to achieve the effects of promoting distribution balance, slowing down electrolyte corrosion, and being easy to prepare

Active Publication Date: 2021-03-09
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention provides an electrolyte solution for zinc secondary batteries containing one or more molecules of amino acid structure as an additive, which fundamentally solves the occurrence of zinc dendrites caused by uneven deposition of zinc and the corrosion of zinc sheets by the electrolyte Gas problem caused by it, thereby improving the safety of zinc secondary batteries

Method used

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  • Electrolyte for zinc secondary battery as well as preparation method and application thereof
  • Electrolyte for zinc secondary battery as well as preparation method and application thereof
  • Electrolyte for zinc secondary battery as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0062] Above-described embodiment provides a kind of electrolytic solution for zinc secondary battery, and described electrolytic solution comprises two trifluoromethylsulfonylimide zinc (Zn(TFSI) that molar concentration is 2mol / L 2 ), water and aspartic acid.

[0063] The preparation method of described electrolytic solution is as follows, two trifluoromethanesulfonimide zinc (Zn(TFSI) 2 ) was added into water to prepare an electrolyte solution of 2mol / L, then aspartic acid was added, stirred and dissolved to form a uniform solution, and the electrolyte solution for zinc secondary batteries described in Examples 1-6 was obtained.

Embodiment 7-12

[0065] Above-described embodiment provides a kind of electrolytic solution for zinc secondary battery, and described electrolytic solution comprises the zinc sulfate (ZnSO4 that molar concentration is 2mol / L 4 ), water and aspartic acid.

[0066] The preparation method of described electrolytic solution is as follows, zinc sulfate (ZnSO 4 ) was added into water to prepare an electrolyte solution of 2mol / L, then aspartic acid was added, stirred and dissolved to form a uniform solution, and the electrolyte solution for zinc secondary batteries described in Examples 7-12 was obtained.

Embodiment 13-18

[0068] Above-described embodiment provides a kind of electrolytic solution for zinc secondary battery, and described electrolytic solution comprises the trifluoromethanesulfonic acid (Zn(OTf) that molar concentration is 2mol / L 2 ), water and aspartic acid.

[0069] The preparation method of described electrolytic solution is as follows, trifluoromethanesulfonic acid (Zn(OTf) 2 ) was added into water to prepare an electrolyte solution of 2mol / L, then aspartic acid was added, stirred and dissolved to form a uniform solution, and the electrolyte solution for zinc secondary batteries described in Examples 13-18 was obtained.

[0070] The types of zinc salts, the types and mass concentrations of additives in Examples 1-18 are shown in Table 1.

[0071] The electrolyte solutions provided in Examples 1-18 and Comparative Examples 1-3 were assembled into a symmetrical battery, and a charge-discharge test was performed. The current density is 2mA·cm -2 , the amount of circulating zi...

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Abstract

The invention provides an electrolyte for a zinc secondary battery as well as a preparation method and application of the electrolyte. The electrolyte comprises a solvent, zinc salt and an additive. The additive comprises at least one amino acid structure. The preparation method comprises the following steps: dissolving the zinc salt in a solvent, then adding an additive, and mixing to obtain theelectrolyte for the zinc secondary battery, wherein the additive comprises at least one amino acid structure. According to the electrolyte for the zinc secondary battery, provided by the invention, molecules containing one or more amino acid structures are used as the additive, so that the problems of zinc dendrites caused by non-uniform deposition of zinc and flatulence caused by corrosion of theelectrolyte to a zinc sheet are fundamentally solved, and the safety of the zinc secondary battery is improved. Meanwhile, cost is low, the preparation method is simple, and production is easy.

Description

technical field [0001] The invention belongs to the technical field of zinc secondary batteries, and relates to an electrolyte solution for zinc secondary batteries, a preparation method and application thereof. Background technique [0002] As one of the oldest batteries, Zn batteries as sustainable electrochemical systems in aqueous electrolytes greatly address the issue of safety compared with Zn-ion batteries (LIBs) using flammable organic electrolytes. Recently, rechargeable zinc secondary batteries have been revived as a safe and environmentally friendly electrochemical system. Zn-ion batteries have been extensively studied for decades, and electrode materials including vanadium oxide, manganese oxide, Prussian blue analogues, and organic materials are well established. Instead, research on anodes is in dire need of development. In aqueous zinc-ion secondary batteries, metal zinc is rich in sources, cheap in price, low in redox potential (-0.76V vs. SHE) and high in ...

Claims

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Application Information

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IPC IPC(8): H01M10/36
CPCH01M10/36H01M2300/0002Y02E60/10
Inventor 周天易穆延璐葛广路陈岚李德兴江鹏
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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