Patent ID: 11942637
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A positive electrode active material for a non-aqueous electrolyte secondary battery, including Ni-containing lithium composite oxides a and b, wherein
an average primary particle size of the Ni-containing lithium composite oxide a is 1 μm or more and larger than an average primary particle size of the Ni-containing lithium composite oxide b,
an average secondary particle size of the Ni-containing lithium composite oxide a is 2 μm to 6 μm,
the Ni-containing lithium composite oxide b has an average primary particle size of 0.05 μm or more and an average secondary particle size of 10 μm to 20 μm,
the Ni-containing lithium composite oxide a includes Mn, includes at least either one of B and Al, contains 55 mol % or more of Ni based on the total number of moles of the metal elements except for Li, and has a crystallite size of 100 nm to 200 nm,
the Ni-containing lithium composite oxide b includes Mn, is free of B and Al or has smaller contents of B and Al than those in the Ni-containing lithium composite oxide a, contains 55 mol % or more of Ni based on the total number of moles of the metal elements except for Li, and has a crystallite size of 100 nm to 200 nm, and
a mass ratio between the Ni-containing lithium composite oxide a and the Ni-containing lithium composite oxide b is 5:95 to 55:45.