Lg Energy Solution, Ltd.

Sungkyunkwan University

Korea University Research and Business Foundation

Dongguk University Industry-Academic Cooperation Foundation

Mi Ru Jo

Yong Mook Kang

Yong Ju Lee

Eun Kyung Kim

Ye Ri Kim

Rae Hwan Jo

Taegyun Noh

Chan Ki Park

Heewon Choi

Junghoon Yang

Won Sub Yoon

Yunok Kim

Jooyul Baek

Discussed is an electrode notching device for a secondary battery, the electrode for a secondary battery, which is manufactured therethrough, and a secondary battery. The electrode notching device for the secondary battery, which notches a non-coating portion of an electrode sheet to provide an electrode tab, includes: a pair of notching molds configured to press and notch the electrode sheet; and a movement prevention roller part provided on pressing surfaces of the pair of notching molds to prevent the electrode sheet from moving when the electrode sheet is notched.

Electrode notching device for secondary battery, electrode for secondary battery manufactured therethrough, and secondary battery

Provided are a cathode active material, a cathode comprising same, and a secondary battery. The cathode active material contains crystal water and a manganese-based metal oxide and has a first crystal phase having a two-dimensional crystal structure and a second crystal phase having a three-dimensional crystal structure, wherein the three-dimensional crystal structure is formed by the combination of manganese in the manganese-based metal oxide and oxygen in the crystal water.

Cathode active material, cathode comprising same, and secondary battery

A method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof includes (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide&#x2014;the surface of which is complexed with the nickel precursor&#x2014;obtained in step (1).

Lithium metal oxide, negative electrode active material for lithium secondary battery comprising the same, and method of preparing the same

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Seoul, South Korea

Mi Ru Jo