Lg Chem, Ltd

Lg Energy Solution, Ltd.

Jung-Keun Yoo

Je-Young Kim

Jong-Heon Seol

Sang-Hoon Choy

Jin-Young Son

Hyung-Suk Cho

Joo-Yul Baek

Yoon-Jung Choi

Yo-Jin Kim

Ye-Lin Kim

Sin-Young Jung

Sung-Joon Park

A positive electrode for a lithium secondary battery includes a positive electrode current collector; a lower positive electrode active material layer disposed on at least one surface of the positive electrode current collector; and an upper positive electrode active material layer disposed on the lower positive electrode active material layer, wherein the lower positive electrode active material layer includes 90% or more of a sphere-type carbonaceous conductive material as a conductive material, the upper positive electrode active material layer includes 90% or more of a needle-type carbonaceous conductive material as a conductive material, and the content of the conductive material contained in the lower positive electrode active material layer is larger than the content of the conductive material contained in the upper positive electrode active material layer.

Multilayer positive electrode for lithium secondary battery and method for manufacturing the same

Disclosed is a positive electrode for a lithium secondary battery which uses a positive electrode active material containing secondary particles with a relatively weak particle strength to improve the adhesion between a positive electrode mixture layer and a current collector, and the positive electrode includes a positive electrode current collector; a primer coating layer including a first polymer binder and a first conductive material, having surface roughness (R) of 85 nm to 300 nm and formed on at least one surface of the positive electrode current collector; and a positive electrode mixture layer formed on an upper surface of the primer coating layer and including a positive electrode active material containing secondary particles with a compressive breaking strength of 1 to 15 MPa, a second polymer binder and a second conductive material.

Positive electrode for lithium secondary battery and method for preparing the same

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Daejeon, South Korea

Jung-Keun Yoo