▎ 摘　　要

NOVELTY - A tin dioxide/graphene composite cathode material preparing method involves adding tin and sodium oligochitosan with water to obtain mixture. The sodium tin dioxide nano particles are uniformly dispersed between oligochitosan molecules through hydrolyses to obtain chitosan oligosaccharide-modified nano-tin oxide precursor followed by adding graphene oxide with mixture at 20-60 degrees C for 6-20 hours to obtain chitooligosaccharide modified tin oxide nanoparticles/graphene oxide Composites and washing and drying the composites to prepare tin dioxide/graphene composite anode material. USE - Method for preparing a tin dioxide/graphene composite cathode material used in a lithium-ion battery. ADVANTAGE - The method enables preparing the cathode material with better electrochemical property.