▎ 摘　　要

NOVELTY - Phosphate ion-doped SnS (Tin sulfide) crystal/nitrogen-doped rGO (reduced graphene oxide) composite material comprises nitrogen-doped rGO nanosheets and phosphate ion-doped SnS nanosheets deposited on surface. The doped SnS crystal has a SnS crystal structure, PO43- (orthophosphate) is embedded between the SnS lattice layers, and Sn is bonded to O, O and P through covalent bonds. USE - The material is useful as cathode for sodium ion battery material (claimed). ADVANTAGE - The material utilizes phytic acid to be implanted into the SnS lattice, achieves a significant improvement in the intrinsic electronic conductivity of SnS, and alleviates the volume expansion problem caused by the insertion/extraction of Na ions in SnS crystals. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite material.