L&f Co., Ltd.

L F Material Co., Ltd.

Sang-Hoon Jeon

Jaephil Cho

Chang-Won Park

Seung-Won Lee

Su An Choi

Junho Eom

Yoon Han Chang

Byung Do Park

Disclosed are a method for preparing a positive electrode active material for a lithium secondary battery and a positive electrode active material for a lithium secondary battery, the method including: preparing a mixture of a precursor represented by Chemical Formula 1 below, a lithium composite oxide represented by Chemical Formula 2 below and capable of intercalating/deintercalating lithium ions, and a lithium feed material; and firing the prepared mixture:A(OH)&#x2003;&#x2003;[Chemical Formula 1]Li[LiAD]EO&#x2003;&#x2003;[Chemical Formula

Method for preparing positive electrode active material for lithium secondary battery

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.

Method for preparing cathode active material for lithium secondary battery

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Daegu, South Korea

Sang-Hoon Jeon