▎ 摘　　要

NOVELTY - Preparation of cobalt alkoxide involves (s1) adding cobalt acetate and lithium hydroxide into ethylene glycol, and stirring, (s2) transferring the obtained solution into a flask, heating in an oil bath, and performing constant temperature reaction under reflux condensation conditions to obtain a precipitated product, and (s3) putting the precipitate product on a circulating water-type multi-use vacuum pump, washing with ethanol, filtering, and drying the product to obtain a dry powder. USE - Preparation of cobalt alkoxide for use in preparation of composite of cobalt alkoxide and reduced graphene oxide for use as lithium-ion battery negative electrode material (all claimed). ADVANTAGE - The method is simple, uses ethylene glycol as the organic ligand of cobalt acetate, ensures high repeatability, and provides product having excellent negative electrode material performance when used in lithium-ion battery electrode. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite of cobalt alkoxide and reduced graphene oxide, which involves (i) adding graphene oxide powder into ethylene glycol, ultrasonically processing, and preparing into alcohol solution of graphene oxide, (ii) adding cobalt acetate and lithium hydroxide into ethylene glycol, and stirring, (iii) dripping the obtained solution into the alcohol solution of graphene oxide, and stirring, and (iv) performing steps (s2) and (s3). The mass ratio of graphene oxide powder and cobalt acetate is 1:2-12. The mol ratio of cobalt acetate and lithium hydroxide is 1:2. The cobalt alkoxide is in the shape of a nanosheet having a diameter of 400 nm to 2 μm. The shape of the composite is such that a reduced graphene oxide film wraps the cobalt alkoxide in the shape of nanosheet.