Positive electrode active material and non-aqueous electrolyte secondary battery containing the same
AssigneeSony Corporation
InventorsYosuke Hosoya, Yoshikatsu Yamamoto
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Abstract
A positive electrode active material includes particles composed of a compound oxide; and coating layers composed of a compound oxide formed on at least parts of the surfaces of the particles. The particles have a layered structure and include a first compound oxide mainly composed of lithium and nickel. The coating layers include a second compound oxide mainly composed of lithium and titanium. The ratio by weight of the first compound oxide to the second compound oxide is between 96:4 and 65:35. The positive electrode active material has a mean particle diameter of 5 to 20 μm.
Claims5
A positive electrode active material comprising:
- particles having a layered structure,
- the particles comprising:
- a first compound oxide of lithium and nickel;
- and
- coating layers formed on at least parts of the surfaces of the particles, the coating layers comprising:
- a second compound oxide of lithium and titanium.
A non-aqueous electrolyte secondary battery comprising a positive electrode active material and a negative electrode active material,
- wherein the positive electrode active material comprises
- particles having a layered structure, the particles comprising:
- a first compound oxide of lithium and nickel;
- and
- coating layers formed on at least parts of the surfaces of the particles,
- the coating layers comprising:
- a second compound oxide of lithium and titanium.
Dependencies are inferred from the claim text.