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Zinc battery negative electrode protected by hydrophobic layer, preparation method and battery

A hydrophobic layer, zinc battery technology, applied in the field of electrochemistry, to inhibit hydrogen evolution, improve battery cycle performance, and inhibit zinc dendrites

Pending Publication Date: 2022-02-01
张韩生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem of zinc negative electrode hydrogen evolution and zinc dendrites restricting the development of zinc ion batteries, the invention provides a zinc battery negative electrode protected by a hydrophobic layer, a preparation method and a battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh the ingredients according to lithium titanate (800nm): polytetrafluoroethylene: water = 50:50:130, mix and stir until uniform, coat a layer of 20μm ~ 30μm hydrophobic protective layer on the surface of the negative electrode of the zinc foil, at 80 ℃ After drying and hot pressing at 320°C to form a film, it is the zinc negative electrode protected by the hydrophobic layer, and the battery is assembled with the negative electrode and the manganese dioxide positive electrode for charge-discharge cycle test.

Embodiment 2

[0034] Weigh the ingredients according to magnesium titanate (1μm): PTFE: water = 30:70:130, mix and stir until uniform, coat a layer of 10μm~20μm hydrophobic protective layer on the negative electrode surface of zinc foil, and dry at 80℃ A layer of porous alumina-doped polypropylene battery separator is then attached as a reinforcing layer, and hot-pressed at 150 °C to form a film, which is a zinc negative electrode protected by a hydrophobic layer, and the battery is assembled with this negative electrode and manganese dioxide positive electrode for charge-discharge cycles. test.

Embodiment 3

[0036] Weigh the ingredients according to the ratio of sodium titanate (1μm): PTFE: water = 40:60:130, mix and stir until uniform, and coat on the polypropylene battery separator doped with porous alumina. The thickness of the hydrophobic protective layer is 10μm~ 20μm, dry at 60°C, stick the side with the hydrophobic coating on the negative electrode of zinc foil, and form a film by hot pressing at 150°C, which is the zinc negative electrode protected by the hydrophobic layer, which is assembled with the positive electrode of manganese dioxide. The battery is subjected to a charge-discharge cycle test.

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Abstract

The invention discloses a zinc battery negative electrode protected by a hydrophobic layer, a preparation method and a battery, and belongs to the technical field of electrochemistry. The method is characterized in that a layer of titanate and hydrophobic binder mixture is arranged on the surface of the zinc battery negative electrode active material to form a zinc negative electrode protection layer, the protection layer has certain hydrophobicity, is stable in structure, can effectively inhibit hydrogen evolution of a zinc negative electrode and can inhibit zinc dendrites, and therefore, the zinc negative electrode provided with the hydrophobic protective layer and the battery adopting the negative electrode can remarkably improve the charge-discharge cycle performance.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and relates to a negative electrode of a zinc battery, a preparation method and a battery. Background technique [0002] Because petrochemical energy is a non-renewable resource and is highly polluting, most countries are vigorously developing new energy batteries to replace petrochemical energy. Lithium-ion batteries have made great progress in electric vehicles and energy storage. However, commercial lithium-ion batteries The battery uses a flammable organic electrolyte, and the assembly and production conditions are harsh, coupled with the scarcity of lithium resources, making the cost of lithium-ion batteries high. Zinc metal (Zn) has a theoretical capacity of up to 820 mAhg-1, and the zinc-manganese secondary battery prepared with zinc anode has a very high energy density, but the problem of hydrogen evolution and zinc dendrite in the zinc anode is difficult to solve. Coating a nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/42H01M4/62H01M10/38
CPCH01M4/04H01M4/42H01M4/628H01M10/38H01M2004/027H01M2300/0008Y02E60/10Y02P70/50
Inventor 张韩生
Owner 张韩生
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