▎ 摘　　要

NOVELTY - Cobalt-iron selenide/graphene nano-belt composite cathode material comprises a graphene nano-belt base body and spherical cobalt iron selenides embedded in the graphene nanofiber base body, where the mass ratio of the graphene nano belt to the cobalt metal selenine in the base body is 20-80 wt.% and 10-100 nm, and the particle size of the copper-iron sulfide is 0.5-4 microns. USE - The cobalt-iron selenide/graphene nano-belt composite cathode material is useful in a lithium ion battery. ADVANTAGE - The cobalt-iron selenide/graphene nano-belt composite cathode material has good structure stability and excellent electrochemical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of cobalt-iron selenide/graphene nano-belt composite cathode material.