Preparation method of vinylon fabric-based graphene/manganese dioxide electrode material

Abstract

The invention discloses a preparation method of a vinylon fabric-based graphene / manganese dioxide electrode material. The preparation method comprises the following steps: (1) coating of a vinylon fabric with graphene oxide; (2) reduction of graphene oxide: a, under the condition of 80-100 DEG C, soaking the vinylon fabric with the graphene oxide coating into a reducing agent solution for 1-2 hours, taking out, washing with water and drying; b, putting the fabric into a 700-900W microwave oven, and heating for 1-3s with high fire, so as to obtain a graphene coating vinylon fabric; and (3) manganese dioxide deposition: depositing manganese dioxide on the surface of the graphene coating vinylon fabric by adopting electrochemical deposition. According to the invention, the graphene-vinylon composite material is used as an electrode current collector, the flexible performance of the electrode material is improved, the electrochemical performance of the electrode material is greatly improved through non-toxic simple secondary reduction and environment-friendly electrochemical deposition of manganese dioxide metal oxide, and a basis is provided for further development of environment-friendly, flexible, light and excellent-performance flexible capacitors and battery electrodes.

Description

technical field [0001] The invention relates to the field of capacitor electrode materials, in particular to a preparation method of a vinylon fabric-based graphene / manganese dioxide electrode material. Background technique [0002] In recent years, wearable electronic products and electronic fabrics have been widely used in the fields of communication, medical, fashion and national defense, driving the development of technology combining electronic devices and clothing. However, the issue of energy supply has become a topic of increasing concern, so the development of Energy storage devices with environmental protection, flexibility, light weight and excellent performance are very necessary. [0003] Energy is an indispensable strategic resource for world development. While the society continues to develop at a high speed, the consumption of fossil fuels, coal and other energy sources has increased sharply to the point of depletion. What is facing mankind is an unprecedent...

AI Technical Summary

Problems solved by technology

But on the one hand, graphene alone has certain defects as an electrode material, and graphene itself is prone to agglomeration between sheets, which will reduce the contact area between graphene and electrolyte ions, thereby reducing the specific capacitance of the supercapacitor. The large specific surface area of ​​graphene makes it easy to react with the electrolyte and form a separator on the surface, thereby increasing the loss of electrode materials

On the other hand, in the technology of using graphene to treat textile materials as electrode materials for supercapacitors, traditional impregnation methods, in-situ growth methods, or mechanical mixing methods are usually used to treat and reduce composite electrode materials. Certain disadvantages, such as less adsorption of graphene that plays a decisive role in conductivity, higher resistance, and no significant improvement in conductivity

Adding cross-linking agents or binders to increase the adsorption of graphene on the surface of textiles will seriously affect the feel and mechanical properties of flexible electrodes.

Moreover, natural fibers such as cotton that are conventionally used have poor chemical stability, and most chemical fibers have poor water absorption performance, so it is difficult to combine with graphene by traditional methods.

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