Lg Chem, Ltd

Seong Ji Ye

Seung Beom Cho

Min Joon Lee

Yoon Bin Park

A method of preparing a positive electrode active material precursor for a secondary battery includes preparing a positive electrode active material precursor by a co-precipitation reaction while adding a transition metal-containing solution containing transition metal cations, a basic solution, and an ammonium solution to a batch-type reactor, wherein a molar ratio of ammonium ions contained in the ammonium solution to the transition metal cations contained in the transition metal-containing solution added to the batch-type reactor is 0.5 or less, and a pH in the batch-type reactor is maintained at 11.2 or less.

Positive electrode active material precursor for secondary battery, preparation method thereof, and method of preparing positive electrode active material

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Daejeon, South Korea

Seong Ji Ye