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US 12,617,696 B2Granted
Powderous lithium cobalt-based oxide cathode active material powder for rechargeable lithium ion batteries and a method for making thereof
AssigneeUmicore AG & Co. KG
InventorsJens Paulsen, KyeongSe Song
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Abstract
A lithium cobalt-based oxide cathode active material powder having: —a primary phase comprising Li, Co, and O, and—a secondary phase comprising LiNaSO4, wherein the content of said LiNaSO4 secondary phase in said powder is of at least 0.4 wt. % and inferior or equal to 1.1 wt. % with respect to a total weight of the cathode active material powder, said cathode active material powder being characterized in that it has a S/Na atomic ratio superior or equal to 0.80 and inferior or equal to 1.20.
Claims11
A lithium-ion secondary battery comprising a lithium cobalt-based oxide cathode active material powder having:
- a primary phase comprising Li, Co, and O, and
- a secondary phase comprising LiNaSO4,
- wherein a content of said LiNaSO4 secondary phase in said lithium cobalt-based oxide cathode active material powder is of at least 0.5 wt. % and inferior or equal to 1 wt. % with respect to a total weight of the lithium cobalt-based oxide cathode active material powder,
- said lithium cobalt-based oxide cathode active material powder being characterized in that it comprises a S/Na atomic ratio superior to 0.8 and inferior to 1.1.
1 more element
Dependencies are inferred from the claim text.