▎ 摘　　要

NOVELTY - Preparing phosphorus-iron co-doped hard carbon composite material comprises mixing ferric ammonium phosphate aqueous solution, basic phenolic resin and organic dispersion of graphene oxide, performing hydrothermal reaction, filtration, and drying to obtain a porous phosphorus/iron co-doped hard carbon precursor, using tris(4-fluorophenyl)phosphine or phosphine as the phosphorus source, subjecting porous phosphorus/iron co-doped hard carbon precursor to gas atomization treatment to obtain secondary phosphorus doping miscellaneous precursor material, carbonizing precursor material doped with secondary phosphorus to obtain phosphorus-iron co-doped hard carbon composite material. USE - The method is useful for preparing phosphorus-iron co-doped hard carbon composite material, which is useful as battery cathode material (claimed). ADVANTAGE - The material has strong bonding force of inner core and shell, good uniformity, is good for storage of the lithium ion, and reduces electron conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a phosphorus-iron co-doped hard carbon composite material.