A kind of preparation method of carbon material for supercapacitor

Abstract

The invention provides a preparation method of a supercapacitor carbon material. In the method, cheap and easily available biomass such as pericarp, vegetables and the like is taken as raw materials, and the supercapacitor carbon material is obtained through steps including thiourea hydro-thermal processing, impurity removing processing, freeze drying processing, calcining processing, alkali / microwave activation processing and the like. The material has the characteristics of a layered structure and a large specific surface area. Since a thiourea hydro-thermal step is carried out in a preparation process, S and N in thiourea molecules are introduced, the specific volume of the material is effectively improved, and an electrode prepared by use of the material has the advantages of large specific volume and good circulating stability. According to the invention, wastes such as watermelon peel, shaddock peel and the like and cheap vegetables such as sweet potatoes, radishes and the like are taken as the raw materials, such that the production cost is decreased, and the preparation method also accords with the strategy of sustainable development for environmental protection and has an important popularization value.

Description

technical field [0001] The invention belongs to the field of supercapacitor electrode materials, and in particular relates to a preparation method of a carbon material for supercapacitors. Background technique [0002] Supercapacitors are a new type of green energy storage device between batteries and traditional capacitors. They have the advantages of high power density, short charging time, and long cycle life. They are widely used as driving power for electric vehicles and backup power for mobile communication equipment. Wait. The performance of supercapacitors mainly depends on their electrode materials. Commonly used supercapacitor electrode materials mainly include carbon materials, transition metal (hydr) oxides, and some conductive polymers, among which carbon materials have attracted extensive attention because of their good charge-discharge stability. At present, the carbon materials used in supercapacitors mainly consist of activated carbon, carbon nanotubes, ca...

AI Technical Summary

Problems solved by technology

It can be seen that the current preparation of carbon aerogels has many problems such as the use of organic chemical reagents, heavy pollution, high production costs, and complicated processes. If some cheap biomass can be used as raw materials and a clean and simple process can be used to prepare carbon aerogels Rubber materials, not only can reduce production costs, but also meet the sustainable development strategy of environmental protection

Moreover, carbon aerogels that only contain carbon have a small specific capacity (usually less than 200 F / g) as electrode materials for supercapacitors, and have basically no practical application value.

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