Composite active material particle, battery, and method for manufacturing composite active material particle
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsKUNIHIKO MINEYA, TADAAKI MATSUMURA
Life of this patent
Estimating the term…
Abstract
A composite active material particle includes an oxide phase containing an oxide and multiple active material domains containing an active material and dispersed in the oxide phase. When a region occupying a surface layer portion of the composite active material particle is defined as a first region, and a region located more inward than the first region is defined as a second region, the first region includes the oxide phase, the second region includes the oxide phase and the multiple active material domains, and the abundance of oxygen in the first region is higher than the abundance of oxygen in the second region.
Claims16
A composite active material particle comprising:
- an oxide phase containing an oxide;
- and
- a plurality of active material domains containing an active material and dispersed in the oxide phase, wherein,
- when a region occupying a surface layer portion of the composite active material particle is defined as a first region, and a region located more inward than the first region is defined as a second region,
- the first region includes the oxide phase,
- the second region includes the oxide phase and the plurality of active material domains, and
- an abundance of oxygen in the first region is higher than an abundance of oxygen in the second region.
A method for manufacturing a composite active material particle, the method comprising:
- coating at least part of a surface of a base particle, the base particle having a structure in which a plurality of active material domains containing an active material are dispersed in an oxide phase, with a constituent material for the oxide phase.
Dependencies are inferred from the claim text.