▎ 摘　　要

NOVELTY - Positive electrode active material-graphene composite particles comprises positive electrode active material particles, and composite particles of lithium ion battery positive electrode active material which is complexed with matrix including graphene. The positive electrode material-graphene composite particles have a value obtained by dividing carbon element (in %) in the positive electrode active material surface measured by X-ray photoelectron measurement with respect to the carbon element (in %) in total positive electrode active material is 1.5-7. USE - Positive electrode active material-graphene composite particles is used for positive electrode material (claimed) for lithium ion battery for mobile telephone and laptop computer. ADVANTAGE - The positive electrode active material-graphene composite particles improve electron conductivity of lithium ion battery by suppressing hindrance of lithium ion deintercalation into positive electrode active material particles. The lithium ion battery containing positive electrode material has high capacity and output characteristics.