L&f Co., Ltd.

Yoon Han Chang

Jaephil Cho

Chang-Won Park

Seung-Won Lee

Sang-Hoon Jeon

Junho Eom

Byung Do Park

A method for preparing a cathode active material for a lithium secondary battery is provided. The preparing method includes: adding a phosphorus compound to a transition metal oxide dispersion liquid to prepare a coating liquid; drying the coating liquid to prepare a powder including phosphorus oxide coated on the surface of the transition metal oxide; and dry-mixing the powder coated with the phosphorus oxide with a lithium intercalation compound, and then firing the mixture to form a solid solution compound of L-M-M-P&#x2014;O (where Mis a transition metal derived from transition metal oxide, and Mis a metal derived from lithium intercalation compound) on the surface of the lithium intercalation compound. The method for preparing a cathode active material for a lithium secondary battery simplifies the conventional preparing process to save process cost, and it provides comparable electrochemical characteristics to a cathode active material obtained from a wet process.

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Hwaseong-si, South Korea

Yoon Han Chang