abstract |
A lithium ion secondary battery excellent in high output characteristics and durability is provided. The lithium ion secondary battery of the present invention is a lithium ion secondary battery comprising a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte solution containing lithium ions, wherein the negative electrode comprises a negative electrode collector, Wherein the positive electrode includes a positive electrode collector and a positive electrode active material layer including a positive electrode active material formed on one or both surfaces of the positive electrode collector, the positive electrode active material layer including a negative electrode active material layer formed on one surface or both surfaces of the positive electrode collector Wherein the positive electrode active material comprises a transition metal oxide capable of intercalating and deintercalating lithium ions and the positive electrode active material layer comprises a specific lithium compound in an amount of 3.8 x 10-9 mol / 10 -2 mol / g. |