A kind of method to protect zinc ion battery electrode

A technology for protecting zinc in ion batteries, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc. Cycle life and other issues, to achieve the effect of improving cycle stability, improving cycle life, and simplifying the preparation formula

Active Publication Date: 2022-07-29
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the cycle life of zinc-ion batteries has always been a difficult problem for researchers.
Zinc-ion batteries will generate a large number of zinc dendrites on the electrode surface during charging and discharging. These zinc dendrites are the root cause of the low cycle life of zinc-ion batteries, and may even cause a short circuit to completely damage the battery.
This greatly limits the development and application of zinc-ion batteries.

Method used

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  • A kind of method to protect zinc ion battery electrode
  • A kind of method to protect zinc ion battery electrode
  • A kind of method to protect zinc ion battery electrode

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment is used to protect the electrolyte of zinc ion battery electrodes. The electrolyte consists of soluble zinc salt, polyoxometalate and deionized water, and the zinc salt is zinc sulfate (ZnSO 4 ), the polyoxometalate is ammonium heptamolybdate ((NH 4 ) 6 Mo 7 O 24 ), where zinc sulfate (ZnSO 4 ) at a concentration of 1 to 3 mol / L, ammonium heptamolybdate ((NH 4 ) 6 Mo 7 O 24 ) is 0.1 to 2 mol / L, and the balance is water.

[0025] 74 mg of ammonium heptamolybdate and 2.87 g of zinc sulfate were dissolved in 10 mL of water and stirred for 24 hours to obtain the target electrolyte.

[0026] The target electrolyte prepared above was used to prepare a zinc symmetric battery. The zinc ion battery of this embodiment is composed of a pair of metal zinc sheets, an electrolyte, and a separator, the separator is glass fiber, and the button battery is assembled in the air.

[0027] The electrochemical test of the zinc symmetric battery in this example was c...

Embodiment 2

[0039] This embodiment is used to protect the electrolyte of zinc ion battery electrodes. The electrolyte consists of soluble zinc salt, polyoxometalate and deionized water, and the zinc salt is zinc sulfate (ZnSO 4 ), the polyoxometalate is phosphomolybdodecanoic acid (H 5 PMo 12 O 41 ), where zinc sulfate (ZnSO 4 ) at a concentration of 1 to 3 mol / L, phosphomolybdododecanoic acid (H 5 PMo 12 O 41 ) is 0.1 to 2 mol / L, and the balance is water.

[0040] 368 mg of phosphomolybdodecanoic acid and 2.87 g of zinc sulfate were dissolved in 10 mL of water, and stirred for 24 hours to obtain the target electrolyte.

[0041] The target electrolyte prepared above in this example was used to prepare a zinc symmetric battery. The zinc ion battery of this embodiment is composed of a pair of metal zinc sheets, an electrolyte, and a separator, the separator is glass fiber, and the button battery is assembled in the air.

[0042] The electrochemical test of the zinc symmetric battery...

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Abstract

The invention discloses a method for protecting an electrode of a zinc ion battery. The zinc ion battery comprises a positive electrode, a negative electrode, a separator between the positive and negative electrodes, and an electrolyte, and a polyoxometalate is added to the electrolyte; In the present invention, polyoxometalate is introduced into the electrolyte for the first time, and the zinc ion battery electrode is protected by inhibiting the growth of zinc dendrites during the cycle, and the cycle life of the zinc ion battery is significantly improved.

Description

technical field [0001] The invention relates to the technical field of zinc ion batteries, in particular to a method for protecting electrodes of zinc ion batteries. Background technique [0002] The energy crisis and environmental deterioration have prompted people to pay more and more attention to sustainable development and the use of high-clean energy, and to conduct in-depth research on green renewable energy and high-efficiency energy storage systems. Among them, rechargeable batteries are the most attractive energy storage and conversion technologies. Lithium-ion batteries that can be repeatedly charged and discharged have good sustainability as an efficient and clean energy source, which is also the hot development of the current lithium-ion battery industry. reason. However, traditional lithium-ion batteries are largely lacking in safety, and unstable lithium-ion and organic electrolytes can easily cause batteries to catch fire or even explode. To solve this probl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/36H01M10/38
CPCH01M10/4235H01M10/36H01M10/38H01M2300/0002Y02E60/10Y02P70/50
Inventor 黄鹏巫海洋
Owner XUZHOU NORMAL UNIVERSITY
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