2results about How to "Excellent capacitance performance" patented technology

The invention provides a nitrogen-doped hierarchical pore carbon material as well as a preparation method and application thereof, and the preparation method comprises the following steps: sequentially dissolving urea, alkali metal hydroxide and / or a pore-forming agent in water to obtain a mixed solution, cooling the mixed solution, adding cellulose-based biomass, and dissolving the cellulose-based biomass to obtain transparent sol; freezing the transparent sol into a solid, and performing vacuum freeze drying to obtain a white loose solid; mixing and grinding the liquid polymeric monomer and the white loose solid, and performing heat treatment to obtain a solid product; and carbonizing the solid product in an inert atmosphere, and then pickling and washing the carbonized product. According to the preparation method, chain-shaped arrangement in cellulose-based biomass molecules is converted into three-dimensional net-shaped arrangement through dissolution, macropores are formed, a macropore framework is kept stable and does not collapse in the carbonization process through polymerization reaction, and the formed hierarchical pore carbon material has a micropore / mesopore / macropore coexisting three-dimensional structure and controllable specific surface area and pore size distribution; meanwhile, in-situ nitrogen doping can also be realized.

The application provides derived plant-based porous carbon and a preparation method and application thereof. The application uses bean sprout biomass as a precursor of activated carbon electrode material for supercapacitors, effectively improves the uniformity of the prepared activated carbon, and further explores a suitable green preparation method and an electrochemical performance optimization mechanism. Specifically, the application takes green bean sprouts as a representative derived plant as a precursor of activated carbon for supercapacitors, and on this basis, a series of related quality improvement modification work is carried out from two aspects of pore structure adjustment and nitrogen atom doping, provides a reference for high-value utilization of biomass and preparation of activated carbon for supercapacitors, and therefore has good practical application value.