Patent ID: 11967700
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein
the positive electrode is provided with a positive electrode active substance layer,
the positive electrode active substance layer contains a lithium composite oxide having a layered structure,
the lithium composite oxide includes a porous particle having a surface portion, the surface portion having an outer surface,
the surface portion of the porous particle comprises a layer having an α-NaCl crystal structure, wherein a thickness of the layer is not less than 5 nm but not more than 80 nm,
a void ratio of the porous particle is not less than 15% but not more than 48%,
the porous particle contains two or more voids having diameters that are at least 10% of a particle diameter of the porous particle, and
the outer surface of the porous particle is provided with a coating of lithium tungstate.