▎ 摘　　要

NOVELTY - Preparing sub-micron rod-shaped cobalt carbonate composite graphene high performance storage material involves dissolving soluble cobalt salt, alkali in water, stirring and reacting, separating the solid in reaction liquid and washing to obtain precursor particle. The precursor particles are stirred and reacted with graphene, carbonate or bicarbonate are subjected, then sealed to the reaction kettle, placed in the oven to react, reaction kettle cooled to room temperature, removed the supernatant in the remove reaction kettle, washed the product, dried to obtain product. USE - Method for preparing sub-micron rod-shaped cobalt carbonate composite graphene high performance storage material used in lithium-ion battery (claimed). ADVANTAGE - The method has regular shape, uniform size, uniform granularity distribution, high structure stability, large specific surface area, high surface activity and short ion transmission distance, so as to provide higher capacity and better cycle stability for lithium ion battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a lithium ion battery, involving: a. weighing the sub-micron rod-shaped cobalt carbonate composite graphene material, acetylene black and sodium alginate, adding certain amount of distilled water, mixing uniformly, grinding and stirring into paste, coating on the current collector; and b. drying the coated current collector, slicing, and assembling to obtain product.