Sk on Co., Ltd.

Sk Innovation Co., Ltd.

Jeong A Kim

Byoung Ho Ko

Sung Jun Park

Kwang Ho Jeong

Jae Yun Min

Yong Seok Lee

Da Bin Chung

Jae Kyu Jin

Jae Young Choi

Ji Hwan Choi

Seung Deok Seo

Sung Do Kim

Do Ae Yu

An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on at least one surface of the anode current collector. The anode active material layer includes an anode active material and an anode binder. The anode active material includes a plurality of composite particles, each of the composite particles include a silicon-based active material particle, and a solid electrolyte interphase (SEI) layer formed on at least a portion of a surface of the silicon-based active material particle. A relative standard deviation of thickness values of the SEI layer of the composite particles, which are measured by an X-ray photoelectron spectroscopy (XPS) from 9 different composite particles among the plurality of composite particles after repeating 100 cycles of charging and discharging is 20% or less.

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

A binder composition for a secondary battery includes an elastic resin that includes a hard segment containing at least one of a urethane unit and a urea unit, and a soft segment containing a polyether unit, and a fluorine-based hydrocarbon resin. A weight ratio of the fluorine-based hydrocarbon resin relative to the elastic resin is in a range from 1.0 to 1.5.

Binder composition of secondary battery and lithium secondary battery including the same

A secondary battery comprising a positive electrode current collector, a first positive electrode mixture layer disposed on the positive electrode current collector and including a first positive electrode active material and a binder, and a second positive electrode mixture layer disposed on the first positive electrode mixture layer and including a second positive electrode active material and a binder. A nickel content of the second positive electrode active material is 80% by weight or less of a nickel content of the first positive electrode active material. By providing a secondary battery including a positive electrode of a multi-layer structure that includes positive electrode active materials having different contents of nickel, a secondary battery capable of improving high-temperature characteristics while maintaining energy density may be provided.

Secondary battery having improved high-temperature properties

The present disclosure relates to a multilayer electrode for a secondary battery. The multilayer electrode for a secondary battery includes: an electrode current collector; a first mixture layer including an active material, a binder, and a single-walled carbon nanotube, the first mixture layer being formed on at least one surface of the electrode current collector; and a second mixture layer including an active material, a binder, and a multi-walled carbon nanotube, the second mixture layer being formed on the first mixture layer. According to the present disclosure, by improving the uniformity of the distribution of the conductive material in the electrode mixture layer, it is possible to prevent the resistance from increasing, and as a result, it is possible to improve the output characteristics of the secondary battery.

Multi layer electrode for secondary battery

Growing community of inventors

Daejeon, South Korea

Jeong A Kim