▎ 摘　　要

NOVELTY - Preparing copper-tantalum co-doped hard carbon composite material comprises adding strontium acetate, tantalum source, organic solution of graphene oxide and phosphorus source into organic solution of hard carbon precursor, carrying out hydrothermal reaction, filtering, drying to obtain tantalum-doped hard carbon precursor, mixing the tantalum-doped hard carbon precursor with copper powder and asphalt, heating and carbonizing under an inert atmosphere. USE - The method for preparing copper-tantalum co-doped hard carbon composite material is used as electrode material of lithium-ion and sodium-ion batteries. ADVANTAGE - The material has higher initial efficiency and storage performance, and the treatment process makes the doping more uniform.