| 摘要 |
PROBLEM TO BE SOLVED: To provide a positive electrode active material, a positive electrode and a lithium ion secondary battery, capable of obtaining sufficient discharge capacity and good in cycle characteristics.SOLUTION: A positive electrode active material is a compound represented by a composition formula: LiVOPO[where, x satisfies -0.15≤x≤0.15.], the compound having a pH of 3.0 or more and 6.8 or less. |
