Lg Energy Solution, Ltd.

Cholong Lee

Doo Kyung Yang

Eunkyung Cho

Taek Gyoung Kim

Yun Kyoung Kim

Jeehyun Ahn

A positive electrode active material for a lithium secondary battery, which can improve the performance of the battery by mixing various carbons with positive electrode active material and applying it, and a preparation method thereof and a lithium secondary battery including the same. The positive electrode active material for the lithium secondary battery includes two or more types of active material composites in which sulfur is supported on the carbon materials contained therein, wherein the carbon materials contained in any one of the two or more types of active material composites differ in at least one of the average particle size and shape from the carbon materials contained in another type of active material composites.

Positive electrode active material for lithium rechargeable battery, manufacturing method therefor and lithium rechargeable battery comprising same

A lithium electrode and a lithium secondary battery including the same. The lithium electrode has a surface oxide layer with a controlled thickness and surface roughness. The lithium electrode may be used as a negative electrode of a lithium secondary battery, for example, a lithium-sulfur secondary battery. A lithium-sulfur battery including the lithium electrode has an enhanced lifetime due to suppression of side reactions with polysulfide.

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Daejeon, South Korea

Cholong Lee