Preparation method of layered graphite flexible current collector

Abstract

The invention relates to preparation of an electrode current collector, and discloses a preparation method of a layered graphite current collector flexible fluid, aiming at the problems that more oxygen-containing functional groups are introduced to the surface of graphite and more defects are generated on graphite crystals due to the fact that a large amount of oxygen is generated in the treatment process of the conventional graphite roughening treatment method. The method specifically comprises the following steps: sticking an adhesive tape on graphite paper, and stripping the adhesive tape at a certain stripping speed; immersing the graphite paper stripped from the adhesive tape into a solvent, and carrying out ultrasonic treatment; and finally, cleaning the treated graphite paper with deionized water, and airing to obtain the layered graphite current collector. The mechanical stripping method including adhesive tape stripping and ultrasonic treatment does not cause defects of graphite crystals, so that the excellent conductivity of graphite is kept. The graphite current collector prepared by the method has a special layered graphite microstructure, so that the graphite current collector has a highly roughened three-dimensional surface, and the electrochemical performance of the constructed flexible supercapacitor can be obviously improved.

Description

technical field [0001] The invention relates to the preparation of electrode current collectors, in particular to a preparation method of layered graphite flexible current collectors. Background technique [0002] With the rapid consumption of fossil fuels such as oil and natural gas, the shortage of primary energy has promoted the development and utilization of new energy sources such as wind energy, solar energy, and nuclear energy. Correspondingly, solving the problem of efficient utilization of energy promotes the development of high-efficiency energy storage devices. As a kind of electrochemical energy storage device, supercapacitor has the characteristics of fast energy storage, long service life, environmental friendliness, safety and reliability, etc., so it has received extensive attention. In recent years, consumer electronics products are developing toward miniaturization, flexibility, and wearable. The development of supercapacitors with high flexibility and exc...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the current graphite roughening treatment method, a large amount of oxygen will be generated during the treatment process, which will lead to the introduction of more oxygen-containing functional groups on the graphite surface, which will cause more defects in the graphite crystal, seriously affect the conductivity of the prepared current collector, and reduce the In order to solve the electrochemical performance of the device, the present invention provides a method for preparing a layered graphite flexible current collector. The method uses a mechanical peeling method including tape peeling and ultrasonic treatment to make the graphite surface tightly stacked with graphite sheets. The three-dimensional plane is transformed into a three-dimensional structure composed of layered graphite

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