Self-repairing all-solid-state supercapacitor and preparation method thereof

Abstract

The invention discloses a self-repairing all-solid-state supercapacitor, which comprises a first composite electrode, a second composite electrode and a hydrogel electrolyte film, wherein the edges ofthe first composite electrode and the second composite electrode are respectively provided with a copper sheet in a clamping manner, the copper sheets are used as current collectors to facilitate current output, the hydrogel electrolyte film is arranged between the first composite electrode and the second composite electrode, and the self-repairing all-solid-state supercapacitor is formed throughlamination. The invention further discloses a preparation method of the self-repairing all-solid-state supercapacitor. The preparation method comprises the steps of S1, preparing a composite electrode material; S2, preparing a hydrogel electrolyte; and S3, cutting the hydrogel electrolyte with the thickness of 1.5 mm into a square film with the size of 15 mm*15 mm, and adhering the composite electrodes with the edges clamped with the copper sheets to the upper side and the lower side of hydrogel, wherein the opposite area of the electrodes on the two sides are made to be 10 mm*10 mm. The supercapacitor prepared by the invention is compact in structure between devices, small in size and thin in thickness.

Description

technical field [0001] The invention belongs to the field of supercapacitors, in particular to a self-repairing all-solid supercapacitor and a preparation method thereof. Background technique [0002] The development of electronic skin, smart clothing and other fields has put forward higher requirements for energy storage devices, and self-healing ability and tensile resilience have become the necessary properties of energy storage devices. Compared with batteries, supercapacitors have high energy density, long cycle life, and fast charging and discharging, so they have more potential in functional design. The existing functionalized supercapacitors cannot meet the real application requirements in terms of tensile strain and self-healing efficiency. [0003] Although there are many studies on functionalized supercapacitors, there are still many key issues to be solved. The following points are the more prominent problems in the current functional research of supercapacitor...

AI Technical Summary

Problems solved by technology

[0004] One: The electrochemical performance is not ideal

The emergence of solid electrolytes effectively solves the problem of electrolyte leakage, but the electrochemical performance of all solid supercapacitors cannot be compared with that of liquid electrolytes.

So far, most supercapacitors with good mechanical performance or self-healing have no satisfactory electrochemical performance, including capacitance, operating voltage, energy density and power density, etc.

[0005] Two: The mechanical properties of each component are not coordinated

This type of method involves complex patch technology, the elongation generally does not exceed 100%, and the performance deteriorates obviously after stretching, and the economic benefit is not good.

For the self-healing ability, the electrode is mainly encapsulated or realized by relying on some kind of external substrate, resulting in low self-healing ability and specific capacitance of the device

[0006] Three: Lack of unified performance evaluation standards

Research on functionalized supercapacitors is increasing day by day, but different testing methods and incomplete performance display make it impossible for researchers to make comparative judgments

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