▎ 摘　　要

NOVELTY - Preparation of sodium iron phosphate composite, involves mixing graphene oxide, sodium hydroxide, and water, hydrothermally reacting, adding ribonucleic acid and EDTA, mixing, adding a gel polymer to the obtained solution, mixing to obtain a hydrogel, freeze-drying the hydrogel, grinding, and sintering. USE - Preparation of sodium iron phosphate composite for positive electrode materials of sodium ion batteries (all claimed). ADVANTAGE - The method provides composite having a structure in which sodium iron phosphate is embedded in quantum dots, with an external covering of reduced graphene oxide loaded with sodium carbonate, which provides excellent electrochemical performance.