Patent ID: 9653725
Date: 2017-05-16
CPC Classifications: C01G,C01P,H01M,Y02E,Y02P,Y02T

Claim:
1. A lithium rechargeable battery comprising: a current collector; and an active material layer that contains active material particles that are retained on the current collector, wherein the active material particles are secondary particles formed by the aggregation of a plurality of primary particles of a lithium transition metal oxide and have a hollow structure having a hollow section formed within the secondary particle and a shell section that surrounds the hollow section, a through hole that penetrates from the outside to the hollow section is formed in the secondary particle, the lithium transition metal oxide is a compound with a layered crystal structure, and the ratio (A/B) in the powder x-ray diffraction pattern of the active material particles, where A is the full width at half maximum of the diffraction peak obtained for the (003) plane and B is the full width at half maximum of the diffraction peak obtained for the (104) plane, satisfies the equation (A/B)≦0.65.