▎ 摘　　要

NOVELTY - The method involves preparing graphite oxide. Graphite oxide ultrasound treatment process is performed. Hexahydrate cobalt nitrate, ammonium fluoride and urea are dissolved in proper amount of deionized water. The graphene oxide is filled into a reaction kettle. Constant temperature of the reaction kettle is about 100 to 200 degree Celsius. Centrifuging, washing and collecting processes are performed. Powder-shaped composite electrode precursor material is grinded. Potassium sulfate and phosphorus pentoxide are added in concentrated sulphuric acid. USE - Graphene in-situ needle cobalt oxide composite electrode material preparation method. ADVANTAGE - The method enables forming a cobalt oxide needle quasi two-dimensional nanometer structure on an in-situ graphene sheet layer so as to increase cobalt oxide circulation service life and ensure better electrochemical property. DETAILED DESCRIPTION - The concentrated sulphuric acid is mixed with potassium permanganate. The washing process is performed by using anhydrous ethanol. An INDEPENDENT CLAIM is also included for a graphene in-situ needle cobalt oxide composite electrode material. DESCRIPTION OF DRAWING(S) - The drawing shows a photographic view of a graphene in-situ needle cobalt oxide composite electrode material preparation method.