▎ 摘　　要

NOVELTY - Preparing sodium ferro-phosphate-type anode material involves mixing sodium carbonate, ferrous oxalate or ferrous oxalate hydrate, ammonium dihydrogen phosphate or diammonium hydrogen phosphate based on required stoichiometric ratio of positive electrode material to obtain the precursor material. The precursor material is dissolved in deionized water, magnetically stirred at 60-120degrees Celsius, and evaporated to dryness to form precursor gel. The precursor gel is dried to form powder, placed in a tube furnace and heated in inert atmosphere at 200-350degrees Celsius for 1-6 hours, or precursor gel is dried to form a powder, and placed in a tube furnace, heat treated in an inert atmosphere at 200-350degrees Celsius for 1-6 hours, and heated up to 350-600degrees Celsius in inert atmosphere for 5-15 hours. The obtained product after the heat treatment is ground to obtain sodium ferrophosphate (NaFePO4) as the sodium ferro-phosphate anode material. USE - Method for preparing sodium ferrophosphate-type anode material for use in positive electrode for a sodium ion secondary battery used in large-scale energy storage device for solar and wind power generation, or smart grid peak shaving, distributed power stations, Any of backup power sources, communication base stations, and energy storage device for electric vehicles (all claimed). ADVANTAGE - The method is simple and cost-effective, cycle is stable, highly safe, provides phosphorus iron ore type anode material with high performance, and raw materials used are low in cost, green, energy-saving, and eco-friendly.