A kind of porous carbon-graphene-metal oxide composite material and its preparation method and application

Abstract

The invention discloses a porous carbon-graphene-metal oxide composite material and a preparation method and an application thereof. By the method, the porous carbon-graphene-metal oxide composite material is obtained by searching a substance with a porous material in the natural world, carrying out high-temperature thermal treatment on the substance and graphene oxide to obtain a porous carbon-graphene composite material and compounding a metal oxide on the composite material. By the porous carbon-graphene-metal oxide composite material, the contradictive problems that the artificially prepared porous material is discontinuous in specific surface area and structure and relatively high in internal resistance can be solved; the specific surface area and the conductivity of the porous material are further improved by a graphene material; and the characteristics of high specific surface area and high conductivity are unified on the same composite material. Meanwhile, the capacitive property of the composite material and the strength of the composite material can be further improved by addition of the metal oxide; the composite material can be applied to the aspects of a super capacitor electrode material and the like; the production process is simple and feasible; and the production cost is low.

Description

technical field [0001] The invention specifically relates to a porous carbon-graphene-metal oxide composite material and its preparation method and application. Background technique [0002] Supercapacitors (Supercapacitors), also known as electric double layer capacitors, is an electrochemical energy storage device, which has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection, and is widely used in automobiles, military , electronics and new energy fields; the stability and reliability of supercapacitors in the application process are superior to traditional batteries, and they are recognized as new energy storage components; with the continuous emergence of new energy industries and new energy related products, With its excellent electrical and power characteristics, supercapacitors have gradually become the main devices for large-scale energy storage. [0003] Supercapacitor capacita...

AI Technical Summary

Problems solved by technology

[0004] Traditional supercapacitors use activated carbon as the electrode material, which is characterized by large specific surface area, good electrical performance, and high capacity; however, the current porous activated carbon material will affect the conductivity of the electrode material while the specific surface area is large. More, the larger the specific surface area, the greater the resistivity of the electrode material. At the same time, due to the discontinuity of the artificially prepared porous structure, it will cause energy loss and reduce the performance of supercapacitor devices and product quality.