▎ 摘　　要

NOVELTY - A lithium iron phosphate composite material comprises core-shell structure. The core is lithium iron phosphate and graphene. The outer casing includes outer casing (I) and outer casing (II) from inside to outside. The outer casing (I) is inorganic lithium salt. The outer casing (II) is carbonitride material. USE - Lithium iron phosphate composite material. ADVANTAGE - The high-pressure solid-density lithium iron phosphate composite material has increased compaction density due to self-lubricating properties of the graphene, improved ion and electron transport rate under the condition of large material magnification and improved rate performance.