▎ 摘　　要

NOVELTY - Preparing lithium iron silicate/graphene cathode material involves using graphene oxide, iron oxalate, lithium silicate and ammonia as raw material through high temperature and high pressure chemical environment treatment. The specific preparation involves taking 3-9 pts. wt. graphene oxide, 17-25 pts. wt. iron oxalate pentahydrate, 13-25 pts. wt. lithium silicate, 45-55 pts. wt. ammonia, 0.5-2 pts. wt. dispersant, and 0.1-0.5 pts. wt. citric acid. The graphene oxide, dispersant and ammonia are mixed to form first solution. The graphene oxide is uniformly distributed by mechanical stirring and dispersed in ammonia water, and added iron oxalate pentahydrate to mixed solution of anhydrous ethanol and deionized water, stirred and dissolved to obtain second solution, poured it into first olution and mixed silicon lithium acid to obtain mixed thired solution, poured mixed solution into ball mill, and added citric acid. USE - Method for preparing lithium iron silicate/graphene cathode material for lithium batteries. ADVANTAGE - The method enables to prepare lithium iron silicate/graphene cathode material has high capacity and depth de-embedded material structure and realizes mobility of anode. DETAILED DESCRIPTION - The wet ball milled is treated for 3-5 hours to obtain suspension, and rapidly heated suspension at 90-130 degrees C in water bath at high pressure, after reacting for 14-20 hours to obtain reddish-brown precursor. The obtained reddish-brown precursor is calcined in protective atmosphere at 600-1000 degrees C for 5-15 hours, after naturally cooled to obatin nitrogen-doped nano-lithium iron silicate/graphene positive electrode material.