NOVELTY - A lithium ion battery has a negative electrode, positive electrode and collector. The active material layer of positive electrode active material layer (34) and/or negative electrode active material layer (44) is a structure formed by laminating active material layer (a) provided on surface of collector and active material layer (b). The active material of layer (a) is a granular active substance material with small average particle diameter, and the active material of layer (b) is granular active substance material with large average particle diameter.    USE - Lithium ion battery is used for vehicle (claimed) e.g. hybrid vehicle, electric vehicle and fuel cell electric vehicle.    ADVANTAGE - The lithium ion battery is excellent in high-rate characteristics.    DETAILED DESCRIPTION - A lithium ion battery has a negative electrode, positive electrode and collector. The negative electrode has negative electrode active material layer containing negative electrode active material provided on the surface of negative electrode collector (40). The positive electrode has positive electrode active material layer containing positive electrode active material provided on the surface of positive electrode collector (32). The active material layer of positive electrode active material layer and/or negative electrode active material layer is a structure formed by laminating active material layer (a) provided on the surface of the collector and active material layer (b). The active material of active material layer (a) is a granular active substance material with small average particle diameter, and the active material of active material layer (b) is granular active substance material with large average particle diameter. The filling rate of active material in layer (a) is higher than the filling rate of active material in layer (b). An INDEPENDENT CLAIM is included for manufacture of lithium ion battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of positive-negative electrode and separator.    Positive electrode collector (32)    Positive electrode active material layer (34)    Negative electrode collector (40)    Negative electrode active material layer (44)    Separators (50A,50B)