A kind of preparation method of flexible electrode and flexible electrode
A flexible electrode and flexible technology, used in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of small capacitance and low electrochemical performance, and achieve improved unit capacitance, increased spacing and specific surface area, strong The effect of flexibility
Active Publication Date: 2018-01-16
WEIMING BATTERY TECH (SHENZHEN) CO LTD
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Problems solved by technology
However, studies have shown that the electrochemical performance of flexible electrodes made of graphene is much lower than expected; that is to say, the capacitance of graphene flexible electrodes produced in practice can basically meet the needs of supercapacitors. , however, its actual capacitance is much smaller than the theoretically expected capacitance
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[0028] The aniline that this example adopts is prepared by distillation under reduced pressure; Ammonium persulfate, graphite and carbon nanotubes are all purchased on the market, and wherein graphite is 325 orders, and carbon nanotube diameter 10-30nm, long 5-15 micron, purity >=95% ( weight); other reagents are commercially purchased analytical reagents without further processing.
[0029] The graphene oxide of this example is prepared by the Hummers method using purchased 325-mesh graphite as a raw material. The Hummers method is a relatively common method in the chemical stripping method, which is recorded in an article published by HummersWS: Hummers W S, Offeman R E. Preparation of graphitic oxide [J]. J Am Chem Soc, 1958, 80 (6) :1339. I won't repeat it here.
[0030] The flexible electrode preparation method in this example includes:
[0031] a. The preparation of carbon nanotube and graphene oxide mixed dispersion liquid, at first, disperse 50mg graphene oxide in d...
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Abstract
The application discloses a method for preparing a flexible electrode and the prepared flexible electrode. The preparation method of the present application includes: a. making carbon nanotubes and graphene oxide into a uniformly dispersed mixed dispersion; b. removing the solvent in the mixed dispersion to make a film with a three-dimensional conductive network; c. In-situ polymerization of organic polymer conductive materials in the network film to obtain a ternary flexible composite film; d. Reducing the graphene oxide in the ternary flexible composite film to obtain a flexible electrode. In the preparation method of the present application, carbon nanotubes and graphene oxide are first formed into a film of a three-dimensional conductive network, and then in-situ polymerized organic polymer conductive materials in the three-dimensional network; in the three-dimensional conductive network, carbon nanotubes are inserted between graphene sheets , not only increases the spacing and specific surface area between graphene sheets, but also carbon nanotubes can make up for the defects generated in the oxidation process of graphene, which is beneficial to electron transport and improves the unit capacitance of flexible electrodes.
Description
technical field [0001] The present application relates to the field of electrode materials, in particular to a method for preparing a flexible electrode and the prepared flexible electrode. Background technique [0002] With the growing concern about limited fossil fuels and environmental issues, it is imperative and important to seek an alternative energy conversion / storage resource. Supercapacitors, also known as electrochemical capacitors, play an extremely important role in energy storage. Supercapacitors have the characteristics of high power density, long service life, etc., and have many potential applications in portable electronic devices, suitable for use in hybrid electric vehicles and implanted medical devices, etc. In recent years, more and more studies have focused on the application of supercapacitors as energy storage devices in different modern installations. An ideal flexible supercapacitor should have both good flexibility and excellent mechanical streng...
Claims
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IPC IPC(8): H01G11/86H01G11/36
CPCY02E60/13
Inventor 范浩森潘锋
Owner WEIMING BATTERY TECH (SHENZHEN) CO LTD