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US 2024/0199440 A1Published application
Positive electrode active material, lithium-ion secondary battery, and manufacturing method for positive electrode active material
AssigneeToyota Jidosha Kabushiki Kaisha
InventorIssei Sugiyama
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Abstract
The present application discloses a positive electrode active material having cycle stability. The positive electrode active material of the present disclosure has an O2-type structure, includes at least Li, Na, at least one of Mn, Ni, and Co, and O as constituent elements, and has Na present in layer form.
Claims5
A positive electrode active material having an O2-type structure, wherein
- the positive electrode active material includes at least Li, Na, at least one of Mn, Ni, and Co, and O as constituent elements, and
- the positive electrode active material has Na present in layer form.
A manufacturing method for a positive electrode active material, the method comprising:
- obtaining a Na compound having a P2-type structure, and
- replacing a portion of Na in the Na compound with Li by ion exchange, while allowing Na to remain in layer form, to obtain a Li compound having an O2-type structure.
Dependencies are inferred from the claim text.