| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery has little variation of a particle diameter and a particle size distribution between manufacturing lots, iron phosphate lithium having characteristic of being especially used suitably as a part of positive pole material of a secondary battery, a manufacturing method that can compounds this with sufficient reproducibility, high capacity, and a stable secondary-battery characteristic are shown. SOLUTION: The iron phosphate lithium has a particle size distribution, which measured with laser diffraction/dispersion method is a normal distribution mathematically, a median of the above particle size distribution of 5.3 μm or less, and the particle diameter from the minimum particle diameter to 10%, of 2.2 μm or less. |
