Positive electrode active material for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery
AssigneePanasonic Corporation
InventorHIDEKAZU HIRATSUKA
Life of this patent
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Abstract
A positive electrode active material for a nonaqueous electrolyte secondary battery contains a lithium composite oxide particle as a main component, in which a ratio of Ni to a total number of moles of all metal elements other than Li is greater than 30 mol %. The lithium composite oxide particle includes a secondary particle being aggregation of primary particles having an average particle diameter of 1 μm or more, and a shell constituted around the secondary particle. A surface layer void is present between the secondary particle and the shell.
Claims5
A positive electrode active material for a nonaqueous electrolyte secondary battery, comprising:
- a lithium composite oxide particle as a main component, in which a ratio of Ni to a total number of moles of all metal elements other than Li is greater than 30 mol %,
- wherein the lithium composite oxide particle includes a secondary particle being aggregation of primary particles having an average particle diameter of 1 μm or more, and a shell constituted around the secondary particle, and
- wherein a surface layer void is present between the secondary particle and the shell.
A nonaqueous electrolyte secondary battery comprising:
- a positive electrode that includes the positive electrode active material;
- a negative electrode;
- and
- a nonaqueous electrolyte,
- wherein the positive electrode active material for a nonaqueous electrolyte secondary battery includes
- a lithium composite oxide particle as a main component, in which a ratio of Ni to a total number of moles of all metal elements other than Li is greater than 30 mol %,
- wherein the lithium composite oxide particle includes a secondary particle being aggregation of primary particles having an average particle diameter of 1 μm or more, and a shell constituted around the secondary particle, and
- wherein a surface layer void is present between the secondary particle and the shell.
Dependencies are inferred from the claim text.