Lg Chem, Ltd

Woo Yeon Kong

Wang Mo Jung

Sun Sik Shin

Sung Bin Park

Seong Hoon Kang

Hye Lim Jeon

Dae Jin Lee

Joo Hong Jin

The present disclosure suppresses, by uniformly coating lithium transition metal composite oxide particles with LiNbO(1&#x2264;w&#x2264;8, 1&#x2264;x&#x2264;13, 1&#x2264;y&#x2264;20), a direct contact between a positive electrode active material and a liquid electrolyte and thereby suppresses a side reaction between the positive electrode active material and the liquid electrolyte, and improves stability at high temperatures and high voltages, and in particular, is effective in enhancing battery performance by forming LiO&#x2014;NbOthrough reacting the coating layer with Li present on the surfaces of the lithium transition metal composite oxide particles.

Surface-treated positive electrode active material for lithium secondary battery, method for preparing the same, and lithium secondary battery comprising the same

The present invention provides a lithium secondary battery, including a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and a separator provided between the positive electrode and the negative electrode, wherein the negative electrode active material may include a titanium-based composite, wherein, when the lithium secondary battery is charged to SOC 50 under C-rate conditions of 0.1 to 40 C, the titanium-based composite has a ratio of the peak area of a plane (400) and the peak area of a plane (111) of 0.76 or more in a measured X-ray diffraction spectrum (XRD). Therefore, the present invention may provide a lithium secondary battery having excellent output characteristics and a battery pack in which a BMS prediction algorithm is simplified.

Negative electrode active material including titanium-based composite, method of preparing the same and lithium secondary battery including the same

Disclosed are a precursor of an electrode active material for a lithium secondary battery, in which a metal material ionizable through electrolytic decomposition is uniformly coated on a surface of a primary precursor formed of a transition metal hydrate, and a method of preparing the same.

Precursor of electrode active material coated with metal and method of preparing the same

Disclosed are a cathode active material and a lithium secondary battery including the same, and a method of manufacturing the cathode active material, the method including:

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Daejeon, South Korea

Woo Yeon Kong