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Zinc ion battery electrolyte and zinc ion battery

A zinc-ion battery and electrolyte technology, applied in battery electrodes, fuel cells, acid electrolytes, etc., can solve the problems of limited reversibility and limited reversible conversion process, and achieve good cycle stability, fast charge transfer process, and more. The effect of the active site

Active Publication Date: 2021-08-27
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

E.g The reversibility of this liquid-solid dissolution / deposition process is very limited. During the cycle, the concentration of manganese ions in the electrolyte gradually decreases, while the quality of the cathode load is getting higher and higher, thus greatly limiting its reversible conversion process.

Method used

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  • Zinc ion battery electrolyte and zinc ion battery
  • Zinc ion battery electrolyte and zinc ion battery
  • Zinc ion battery electrolyte and zinc ion battery

Examples

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preparation example Construction

[0058] In some embodiments, the preparation method of positive electrode material comprises the following steps:

[0059] S1, adding the 2-methylimidazole solution into the cobalt nitrate solution, and mixing evenly to obtain a mixed solution;

[0060] S2. Soak the carbon paper in the mixed solution, take it out, wash it and dry it;

[0061] S3, placing the dried carbon paper in a tube furnace, and sintering under an inert gas atmosphere;

[0062] S4. Etching the sintered carbon paper in an etching solution containing iron salt and acid, washing and drying to obtain the positive electrode material.

[0063] In some embodiments, the inert gas includes a mixed gas of hydrogen and argon, and the volume fraction of hydrogen is 5-10%.

[0064] In some embodiments, the dried carbon paper is placed in a tube furnace and sintered in an inert gas atmosphere, wherein the sintering is specifically: heating from room temperature to 750-850°C at 0.8-1.5°C / min, and sintering for 1- 3h. ...

Embodiment 1

[0071] The embodiment of the present application provides a zinc ion battery electrolyte, including VOSO 4 and H 2 SO 4 mixture, specifically in 1M H 2 SO 4 Join VOSO 4 , so that VOSO 4 The concentration is 0.5M.

[0072] The embodiment of the present application also provides a zinc ion battery, including a positive electrode, an anion exchange membrane, a cation exchange membrane, and a negative electrode;

[0073] Wherein, the positive pole is loaded with carbon paper of carbon nano-array;

[0074] The negative electrode is zinc foil;

[0075] The zinc ion battery electrolyte in embodiment 1 is positioned between positive pole and anion exchange membrane;

[0076] An anolyte is filled between the cation exchange membrane and the negative electrode, and the anolyte includes KOH saturated with zinc oxide; the anolyte is specifically 1M KOH with zinc oxide added to saturation;

[0077] K is filled between the anion exchange membrane and the cation exchange membrane 2...

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Abstract

The invention provides a zinc ion battery electrolyte and a zinc ion battery. The electrolyte comprises VOSO4 or a mixture of VOSO4 and H2SO4. According to the zinc ion battery electrolyte disclosed by the invention, the reversibility of the process is improved by utilizing the redox couple, VO < 2 + > ionized by vanadyl sulfate is subjected to charge transfer, a product is in a liquid state and cannot be accumulated on a cathode, so that the liquid-liquid reaction process can bring better cycle stability and a rapid charge transfer process.

Description

technical field [0001] The invention relates to the technical field of zinc ion batteries, in particular to a zinc ion battery electrolyte and a zinc ion battery. Background technique [0002] To break through the decomposition potential of aqueous electrolytes and avoid the disadvantages of nonaqueous electrolytes, zinc-based hybrid redox flow batteries have been gradually developed. Considering the low cost and environmental protection of zinc, aqueous Zn-based redox flow batteries have remarkable capacity and high redox potential, overcoming the problem of low energy density caused by the limited operating voltage window of aqueous batteries. This novel system opens a new avenue for zinc-ion batteries, making them more accessible for use in large-scale energy storage grids. [0003] A new type of electrodeless electrolytic zinc-manganese battery is disclosed in the prior art, and it is charged with a constant voltage of 2.2V, Mn 2+ / Mn 4+ The dual-electron transfer mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01M4/96
CPCH01M8/188H01M4/96H01M2300/0005Y02E60/50
Inventor 杨高琛
Owner HUBEI UNIV