| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaluation method of a positive electrode active material containing nickel oxyhydroxide.SOLUTION: As for the evaluation method of this positive electrode active material, the positive electrode active material 100 is evaluated based on an evaluation index X obtained by a ratio of a water amount V of nickel oxyhydroxide 120 originated in the positive electrode active material 100 and a specific surface area B of the positive electrode active material 100. In this evaluation method of the positive electrode active material, a sample is obtained from the positive electrode active material, the evaluation index X is obtained, and the positive electrode active material 100 is evaluated based on the evaluation index X. |
