| 摘要 |
PROBLEM TO BE SOLVED: To provide a positive electrode active material for lithium ion secondary battery having high rate characteristics, and to provide a positive electrode for lithium ion secondary battery and a lithium ion secondary battery.SOLUTION: A positive electrode active material for lithium ion secondary battery has active material particles containing one or more kinds of compound containing Li and a transition metal, and a coating layer covering at least a part of the surface of the active material particles. The coating layer is composed of at least one kind of graphene and multilayer graphene. In the Raman spectrum of the coating layer, there are G band (peak of 1530-1630 cm) and 2D band (peak of 2650-2750 cm), and the intensity of the 2D band (2D/G) standardized by the intensity of the G band satisfies the relation 0.05≤2D/G.SELECTED DRAWING: Figure 1 |
