Bamboo-based hard carbon negative electrode material, and preparation method and application thereof

Abstract

The application discloses a bamboo-based hard carbon negative electrode material and a preparation method and application thereof, and belongs to the field of sodium ion battery materials. Bamboo is used as raw material, and after washing and crushing, a precursor of the hard carbon is prepared by using cellulase treatment, and the bamboo-based hard carbon negative electrode material is obtained by high-temperature carbonization after washing and drying. The content of cellulose in the bamboo and the crystalline structure of the cellulose are adjusted by the cellulase treatment, which is beneficial to the formation of the closed pore structure after high-temperature carbonization, and can effectively improve the initial coulombic efficiency and reversible capacity of the hard carbon negative electrode material. The performance of the obtained bamboo-based hard carbon negative electrode material is equivalent to that of the commercially available hard carbon, and can even exceed the performance of the commercially available hard carbon. The raw material used in the application is a biomass resource, which is green and renewable. The preparation method is a biological method, which is environmentally friendly and simple, and can be industrialized.

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