| 摘要 |
A positive electrode active material for a non-aqueous electrolyte secondary battery is provided. The positive electrode active material includes a composite oxide containing lithium and metal M other than lithium, and M contains Ni, Mn, and Co. The molar ratio of Ni to the total of Ni, Mn, and Co is from 0.45 to 0.65, and the molar ratio of Mn to the total of Ni, Mn, and Co is from 0.15 to 0.35. The positive electrode active material has a pressed density under a compression of 60 MPa of 3.3 g/cm3 or more and 4.3 g/cm3 or less. The positive electrode active material has a volume resistivity under a compression of 60 MPa of 100 Omega·cm or more and less than 1000 Omega·cm.
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