Composite electrode material, preparation method thereof, and supercapacitor

Abstract

The invention discloses a composite electrode material, and belongs to the technical field of electrochemistry. The composite electrode material is prepared by taking carbon nitride loaded cobaltosic oxide as a raw material, acetylene black as a conductive agent and polyvinylidene fluoride as an adhesive. The invention also provides a preparation method of the composite electrode material and a preparation method of the carbon nitride loaded cobaltosic oxide. The carbon nitride-loaded cobaltosic oxide combines the advantages of low price, no toxicity, high ideal specific capacitance and the like of cobaltosic oxide and the advantages of high structural stability, high nitrogen content, excellent electron transmission and the like of graphite-phase carbon nitride; and the composite electrode material prepared by using the carbon nitride loaded cobaltosic oxide as the raw material has the advantages of high specific surface area, good electrochemical performance, high stability and the like.The invention also provides a supercapacitor. The positive electrode material of the supercapacitor is the composite electrode material. The composite electrode material prepared from the composite electrode material is relatively high in charge-discharge capability and cycling stability capability.

Description

technical field [0001] The invention relates to a composite electrode material, a preparation method and a supercapacitor, and belongs to the technical field of electrochemistry. Background technique [0002] With the development of economy and technological progress, the energy crisis and environmental pollution are becoming more and more serious, so it is very important to find new clean energy and energy storage devices. Supercapacitors are widely used in information processing terminals, electric vehicles, etc. due to their many advantages such as fast charge and discharge, long cycle life, and high power density, and have become energy storage devices that have attracted much attention today. Electrode materials are an important part of supercapacitors and also play a decisive role in their performance. Therefore, the development of electrode materials is the direction that researchers are constantly advancing. [0003] There are many kinds of electrode materials for ...

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Problems solved by technology

[0003] There are many kinds of electrode materials for supercapacitors, commonly used materials are transition metal oxides / hydroxides (such as tricobalt tetroxide, strong cobalt oxide), polymers (such as polyaniline, polypyrrole and their derivatives), carbon materials (such as graphene, Carbon nanotubes, carbon fibers, activated carbon), but a single material has its own advantages and disadvantages, it is difficult to greatly improve the electrochemical performance, and binary or ternary composite materials can combine the performance of each material to make the supercapacitor charge and discharge Improved capacity and cycle stability

[0004] Cobalt tetroxide has the advantages of low price, non-toxicity, and high ideal specific capacitance, but due to its low conductivity, the actual specific capacitance is far lower than the ideal specific capacitance value.

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