Samsung Sdi Co., Inc.

Samsung Fine Chemicals Co., Ltd.

Hae In Cho

Mi Sun Lee

Sung Nim Jo

Pil Sang Yun

Shin Jung Choi

Yun Ju Cho

Hyung Cheoul Shim

Dong Myung Yoon

A method for preparing a positive active material for a lithium ion secondary battery, the method including obtaining a mixture by mixing a lithium containing compound and metal oxide, distributing powder of a lithium containing compound into a furnace, and heat treating the mixture in the furnace, wherein a thermal decomposition temperature of the lithium containing compound power distributed into the furnace is lower than that of the lithium containing compound mixed with the metal oxide.

Method for preparing positive active material for lithium ion secondary battery, positive active material prepared thereby, and lithium ion secondary battery including the same

A method for preparing a lithium manganese oxide positive active material for a lithium ion secondary battery, which has spherical spinel-type lithium manganese oxide particles having two or more different types of sizes, the method including uniformly mixing manganese oxide having two or more different types of sizes with a lithium containing compound, and heat treating the resultant mixture to obtain lithium manganese oxide.

Method for preparing lithium manganese oxide positive active material for lithium ion secondary battery, positive active material prepared thereby, and lithium ion secondary battery including the same

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Chungcheongnam-do, South Korea

Hae In Cho