| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium ion battery having a high capacity retention rate even when lithium oxide having a layered rock salt structure is used as a positive electrode active material.SOLUTION: An embodiment of the present invention relates to a lithium ion battery that includes at least an electrolyte and a positive electrode including a positive electrode active material. The positive electrode active material has a layered rock salt structure and includes lithium oxide represented by chemical formula: LiMMO(where, 1.16≤x≤1.32, 0.33≤y≤0.63, 0.06≤z≤0.50 and 0≤d≤0.2 are satisfied, Mrepresents at least one metal selected from among Mn, Ti and Zr, and Mrepresents at least one metal selected from among Fe, Co and Ni), and the electrolyte includes a fluorine-containing solvent. |
