▎ 摘　　要

NOVELTY - A positive electrode (20) comprises a current collector (22) and an active material layer (24) provided on the surface of current collector. The active material layer comprises an active material, and graphene or multilayer graphene, and a vanadium-containing compound whose particle diameter is smaller than the average particle diameter of graphene or multilayer graphene. At least one portion of the vanadium-containing compound is adhered to the surface of graphene or multilayer graphene. USE - Positive electrode is used in lithium ion secondary battery (claimed) used for portable electronic devices, hybrid vehicles, and electric vehicles. ADVANTAGE - The positive electrode provides lithium ion secondary batteries with improved cycle characteristics. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional schematic view of the lithium ion secondary battery. Positive electrode (20) Current collector (22) Active material layer (24) Laminate (40) Lithium ion secondary battery (100)