NOVELTY - A lithium ion secondary battery has positive electrode (64), negative electrode and nonaqueous electrolyte. The positive electrode is equipped with positive electrode collector (62) and positive electrode mixture layer (66) containing positive electrode active material (70) formed on the positive electrode collector. The positive electrode active material comprises manganese-containing lithium complex oxide (72) containing lithium and manganese. The positive electrode active material (70) has coating film (74) containing amorphous structure having iron and fluorine.    USE - Lithium ion secondary battery is used as drive power supply of vehicle (claimed) e.g. motor vehicle, hybrid vehicle and electric vehicle.    ADVANTAGE - The lithium ion secondary battery has improved manganese dissolution inhibition performance during charging and discharging of the battery, and excellent capacitance maintenance factor.    DETAILED DESCRIPTION - A lithium ion secondary battery has positive electrode, negative electrode and nonaqueous electrolyte. The positive electrode is equipped with positive electrode collector and positive electrode mixture layer containing positive electrode active material which is formed on the positive electrode collector. The positive electrode active material comprises manganese-containing lithium complex oxide containing lithium and manganese as transition metal element. The positive electrode active material has coating film containing amorphous structure having iron and fluorine, which is formed on at least a portion of the surface of the manganese-containing lithium complex oxide. An INDEPENDENT CLAIM is included for manufacture of lithium ion secondary battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the positive electrode.    Positive electrode collector (62)    Positive electrode (64)    Positive electrode mixture layer (66)    Positive electrode active material (70)    Manganese-containing lithium complex oxide (72)    Film (74)