▎ 摘　　要

NOVELTY - A natural sulfide ore base carbon composite material is prepared by natural sulfide ore and carbon source, where the natural sulfide ore is transition metal sulfide ore mineral. USE - Natural sulfide ore base carbon composite material used as cathode active material of sodium ion battery (claimed). ADVANTAGE - The composite material uses natural sulfide ore as raw material which is energy-saving and environment-friendly, and carbon coats the natural sulfide ore which solves the problem of charging and discharging volume expansion of natural sulfide ore generating shuttle effect. The obtained sodium ion battery has good cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation of natural sulfide ore base carbon composite material comprising processing natural sulfide ore to obtain fine-grade natural sulfide ore, mixing with carbon source to obtain mixture, and carrying out heat treatment.