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US 2026/0094819 A1Published application
Positive electrode active material and lithium secondary battery using the same
AssigneeEcopro Bm Co., Ltd.
InventorsJung Bae PARK, Chae Won MOON, Hyun Jong YU, Yu jin SON
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Abstract
The present invention relates to a cobalt-free positive electrode active material having improved thermal stability and electrochemical properties, and a lithium secondary battery using the same.
Claims15
A positive electrode active material comprising lithium composite oxide containing at least nickel and manganese,
- wherein the lithium composite oxide is partitioned into an inner bulk and an outer bulk that surrounds the surfaces of the inner bulk,
- wherein the Ni/Mn molar ratio of the outer bulk is smaller than the Ni/Mn molar ratio of the inner bulk, and
- wherein the Ni/Mn molar ratio of the inner bulk is more than 4.26 and less than 9.00.
Dependencies are inferred from the claim text.