▎ 摘　　要

NOVELTY - Preparing graphene/lithium cobaltate composite anode material comprises (i) slowly adding aqueous nitric acid solution into graphene, mixing uniformly, allowing to stand in a water bath, ultrasonically stirring at room temperature, (ii) filtering the solution by filter paper, centrifuging and washing the solid with de-ionized water until the pH is 6-7, drying, grinding, and sieving with 300-mesh sieve to obtain high density graphene, and (iii) mixing and ball milling the high density graphene and lithium cobalt oxide, and calcining in argon atmosphere to obtain graphene/lithium cobaltate composite anode material. USE - The anode material is useful in capacitive lithium ion batteries and development of energy power double-high energy storage technology. ADVANTAGE - The material has high specific capacity and multiplying power performance, and simple preparation method.