Sk on Co., Ltd.

Sk Innovation Co., Ltd.

Jeong Hoon Jeun

Kwang Ho Lee

Ji Hoon Choi

Jik Soo Kim

Yong Hyun Cho

Sung Soon Park

Yong Seok Lee

Young Hoon Do

Jae Yun Min

Myung Ro Lee

Hyun Joong Jang

Jae Ram Kim

Ki Joo Eom

Byoung Beom Lim

Je Nam Choi

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

The cathode active material according to embodiments of the present invention includes a lithium composite oxide particle having a form of secondary particle in which a plurality of primary particle are aggregated, wherein the primary particles respectively include a lithium conduction pathway through which lithium ions are diffused. Wherein the primary particles include a first particle, and the first particle has an angle of 45° to 90° formed by a direction from a center of the first particle to a center of the lithium composite oxide particle and a direction of the lithium conduction pathway included in the first particle, wherein a ratio of the number of the first particles among the primary particles located on a surface of the lithium composite oxide particle is 20% or more.

Cathode active material and lithium secondary battery including the same

A cathode for a lithium secondary battery according to an embodiment of the present invention includes a cathode current collector, and a cathode active material layer on the cathode current collector. The cathode active material layer includes cathode active material particles. The cathode active material particles include first lithium metal oxide particles having a shape of a secondary particle in which a plurality of primary particles are aggregated, and second lithium metal oxide particles having a shape of a single particle. A closed pore ratio of the cathode active material layer is 5% or less.

Cathode for lithium secondary battery, lithium secondary battery including the same and method of fabricating lithium secondary battery

Growing community of inventors

Daejeon, South Korea

Jeong Hoon Jeun