Self-repairing hydrogel, preparation method thereof and flexible self-repairing rechargeable battery

A rechargeable battery, self-healing technology, applied in secondary batteries, battery electrodes, secondary battery repair/maintenance, etc., can solve problems such as poor battery safety

Active Publication Date: 2021-02-09
安徽安瓦新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is to provide a flexible self-repairing rechargeable battery, using cheap raw materials to prepare vanadium-based materials in one step, using the self-repairing hydrogel prepared by the present invention as the electrolyte to obtain a flexible self-repairing water system Zinc-ion batteries solve technical problems such as poor safety of organic electrolyte batteries, and provide a novel, high-yield, and low-cost battery

Method used

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  • Self-repairing hydrogel, preparation method thereof and flexible self-repairing rechargeable battery
  • Self-repairing hydrogel, preparation method thereof and flexible self-repairing rechargeable battery
  • Self-repairing hydrogel, preparation method thereof and flexible self-repairing rechargeable battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053]Preparation of zinc ion battery cathode material and zinc / carbon cloth anode material:

[0054]1) The preparation method of zinc ion battery cathode material, specifically vanadium disulfide / carbon cloth composite material, specifically:

[0055]Weigh 3.6mmol NH4VO3In a beaker, add 30mL of deionized water, dissolve it under magnetic stirring, then add 27mmol of thioacetamide, and 3.6mL of 37wt% ammonia, and pour the resulting solution into the inner container of a 50mL polytetrafluoroethylene reactor. Add a piece of 1×2cm rectangular carbon cloth, ultrasonic to remove the air in the carbon cloth, react for 8 hours under the condition of 180℃, after the reaction, wash with deionized water and absolute ethanol 5 times respectively, 60℃ After vacuum drying for 12 hours, the flake vanadium disulfide grown on carbon cloth is obtained. The SEM image is asfigure 1 As shown, the dense layered structure can be seen from the figure, and the XRD pattern is asfigure 2 As shown, it can be seen f...

Embodiment 2

[0060]A preparation method of self-healing hydrogel includes the following steps:

[0061]1) Dissolve 10.976g zinc acetate dihydrate and 1.225g manganese acetate tetrahydrate in 50mL deionized water to form 1mol L-1Zn(Ac)2And 0.1mol L-1Mn(Ac)2Of electrolyte.

[0062]2) Take 25mL of the electrolyte in step 1), add 6g of 1797 type polyvinyl alcohol to it, keep it at 85°C under magnetic stirring for 1h, after ultrasonic defoaming, pour the prepared viscous liquid into a petri dish with a diameter of 7cm In, placed at room temperature for 12 hours to obtain the self-repairing hydrogel.

[0063]3) Cut the self-healing hydrogel prepared in step 2) into small pieces, immerse it in liquid nitrogen, put it into a freeze dryer after solidification, and dry for 48 hours to obtain a loose and porous dry hydrogel, which is then powdered. Raman TuruFigure 5 As shown, the transmission infrared image is asImage 6 As shown, they jointly prove the functional groups contained in the hydrogel.

[0064]4) Prepare t...

Embodiment 3

[0066]A flexible self-repairing rechargeable battery is prepared based on the self-repairing hydrogel prepared by the method in Example 2.

[0067]The flexible self-healing rechargeable battery includes: zinc ion battery cathode material, zinc / carbon cloth and the self-healing hydrogel prepared above;

[0068]The zinc ion battery cathode material is prepared according to the preparation method described in Example 1, and is used as the battery cathode.

[0069]The zinc / carbon cloth was prepared according to the preparation method described in Example 1, and was used as the negative electrode of the battery.

[0070]The assembly of the flexible self-healing rechargeable battery is carried out in the air. A piece of self-healing hydrogel is placed on a zinc / carbon cloth slightly larger than the electrode sheet, and then the vanadium disulfide / carbon cloth composite material is grown on the carbon cloth. The side of the vanadium disulfide is close to the hydrogel, and then a drop of the electrolyt...

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Abstract

The invention provides a self-repairing hydrogel, a preparation method thereof and a flexible self-repairing rechargeable battery. Vanadium salt is used as a raw material, thioacetamide is used as a sulfur source, and a hydrothermal reaction is carried out to synthesize a vanadium disulfide nanosheet growing on carbon cloth fibers, and the vanadium disulfide nanosheet is used as a positive electrode of the battery; zinc is plated on the carbon cloth through electro-deposition to serve as a negative electrode of the battery; and zinc acetate and manganese acetate are used as electrolytes and dissolved in water to form an aqueous electrolyte, and then 1797-type polyvinyl alcohol is added to form hydrogel serving as the electrolyte. The prepared battery solves the problem of poor safety facedby the current battery, the prepared hydrogel flexible zinc ion battery can still keep high stability after being damaged by bending, cutting and the like, and the material has the advantages of goodcycle performance, safety and the like when being applied to the zinc ion battery.

Description

Technical field[0001]The invention belongs to the field of battery materials, belongs to the technical field of self-repairing flexible rechargeable battery cathode materials, and specifically relates to a flexible self-repairing zinc ion battery prepared from a polyvinyl alcohol-based self-repairing hydrogel and a vanadium disulfide / carbon cloth composite material .Background technique[0002]Since the current commercial lithium-ion battery material lithium cobalt oxide is expensive, its price fluctuates greatly due to market factors. And when it is damaged by external forces such as impact, crushing, etc., the organic solvent electrolyte will cause the battery to burn, swell, explode, etc., thereby bringing great safety hazards.[0003]Water-based zinc-ion batteries use water as the electrolyte, which will improve battery safety. The zinc ions pass through the separator and the electrolyte, and generate current through the insertion and de-intercalation in the material at the positive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08L29/04C08K5/098H01M10/38H01M4/58H01M4/62H01M4/38H01M10/42B82Y30/00B82Y40/00
CPCC08J3/075C08J3/24H01M10/38H01M4/5815H01M4/625H01M4/38H01M10/4235B82Y30/00B82Y40/00C08J2329/04C08K5/098Y02E60/10Y02P70/50
Inventor 刘金云龙佳炜周婷韩阗俐
Owner 安徽安瓦新能源科技有限公司
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