▎ 摘　　要

NOVELTY - Preparing cobalt (II) oxide/reduced graphene oxide composite negative electrode material involves adding oleylamine and oleic acid into isopropanol in volume ratio of (0.5-2):(0.5-2):80 to obtain solution A. The cobalt source and precipitating agent are added into solution A, and stirring to obtain solution B, where ratio of cobalt source and isopropanol solution is (1~5) mmol:80 milliliter. USE - Method for preparing cobalt (II) oxide/reduced graphene oxide composite negative electrode material (claimed). ADVANTAGE - The method enables to prepare cobalt (II) oxide/reduced graphene oxide composite negative electrode material which has improves specific capacity of the electrode, generates fly catching grass-like compound which has great help to maintain stability of the material, reduces volume expansion effect of material, improves auxiliary effect of conductivity, and has improve electrochemical performance of the material. DETAILED DESCRIPTION - Preparing cobalt (II) oxide/reduced graphene oxide composite negative electrode material involves adding oleylamine and oleic acid into isopropanol in volume ratio of (0.5-2):(0.5-2):80 to obtain solution A. The cobalt source and precipitating agent are added into solution A, and stirring to obtain solution B, where ratio of cobalt source and isopropanol solution is (1~5) mmol:80 milliliter. The graphene oxide is added into solution B, stirred uniformly to obtain suspension C, where ratio of graphene oxide to isopropanol solution is (0.08-0.24) gram: 80 milliliter. The suspension C is sonicated undergoes oil bath reaction to obtain precipitate. The precipitate is separated, washed, and dried to obtain precursor. The precursor is incubated in atmosphere furnace at 300-500 degrees C for 0.5-2 hours, cooled to room temperature to obtain final product.