| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium secondary battery which is improved in output in a low-SOC region.SOLUTION: A lithium secondary battery of the invention comprises a positive electrode active material of a hollow structure having a shell part and a hollow part formed therein. The positive electrode active material has a layered crystal structure, and comprises a lithium transition metal oxide including at least one kind of metal element Mof Ni, Co and Mn. In a powder X-ray diffraction pattern using CuKα rays, the positive electrode active material has a ratio (A/B) of the half-value width of a diffraction peak A obtained from (003) plane to the half-value width of a diffraction peak B obtained from (104) plane of 0.7 or smaller. The content of a compound including Li and COis 0.2 mass% or less. |
