| abstract |
The invention discloses a hard carbon composite material and a preparation method and application thereof. The composite carbon material of the present invention presents a core-shell structure, is composed of a hard carbon material in the inner core and a fluorocarbon in the outer shell, and is prepared by simple heat treatment using commercial hard carbon and fluoropolymer. The use of hard carbon composites for sodium-ion battery anodes can achieve an optimal balance of capacity, Coulombic efficiency, and cycle life. The invention adopts cheap raw materials and a simple method to prepare the hard carbon composite material, and has the advantages of low energy consumption, low cost and short period, and is favorable for large-scale production. |