Sk on Co., Ltd.

Sk Innovation Co., Ltd.

Hyun Joong Jang

Kwang Ho Jeong

Yong Seok Lee

Da Bin Chung

Myung Ro Lee

Jae Ram Kim

Ki Joo Eom

Sung Jun Park

Byoung Wook Jo

Jae Yun Min

Sang Won Bae

Jae Yeong Lee

Min Hwan Kim

Jeong Hoon Jeun

Ji Won Na

Je Nam Choi

Yeon Hwa Song

A negative electrode for a secondary battery includes: a current collector; a first negative electrode active material layer formed on the current collector and containing a first active material; and a second negative electrode active material layer formed on the first negative electrode active material layer and containing a second active material. The second active material is a bimodal active material including small particles and large particles having different particle sizes, a particle size (D2) of the second active material is smaller than a particle size (D1) of the first active material, and the particle size of the second active material is an average particle size of the small particles and the large particles.

Negative electrode for secondary battery, and secondary battery including same

Cathodes and lithium secondary batteries including the cathodes are disclosed. In some implementations, a cathode may include a cathode current collector and a cathode active material layer disposed on the cathode current collector and including cathode active material particles such that the cathode active material layer satisfies a specific equation. The cathode active material particles may include lithium metal oxide particles that include nickel, and may have a mole fraction of cobalt of 0.02 or less with respect to all elements except for lithium and oxygen.

Cathode for lithium secondary battery and lithium secondary battery including the same

An electrode for a secondary battery includes: an electrode current collector; and an electrode mixture layer formed on at least one surface of the electrode current collector. Based on a region corresponding to 50% of a thickness of the electrode mixture layer in a direction in which the electrode mixture layer is formed from a surface of the electrode current collector, a ratio (B/A) of cohesive force (A) between an electrode active material and a binder or between adjacent binders included in a lower region, and cohesive force (B) between an electrode active material and a binder or between adjacent binders included in an upper region is less than 1.5.

Electrode for secondary battery and method for preparing the same

A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes a cathode active material and a conductive material ID/IG is in a range from 0.5 to 1.25 in a Raman spectrum of the cathode active material layer. The cathode active material includes lithium metal oxide particles containing nickel and manganese and having a content of cobalt of less than 2 mol % among all elements except for lithium and oxygen.

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Daejeon, South Korea

Hyun Joong Jang