Lg Energy Solution, Ltd.

Ilhong Kim

Minchul Jang

Seok Koo Kim

Sung Chul Lim

InSung Uhm

YoHan Kwon

Byounghyo Jung

Gisu Jeong

A secondary battery according to an embodiment of the present disclosure is a secondary battery including a cathode in which a cathode material is applied onto a cathode current collector, wherein the cathode material includes an irreversible additive and a cathode active material, and the irreversible additive includes lithium nickel oxide (LNO) having a trigonal crystal structure within an operating range from 3.0 V or more to 4.0 V or less in the secondary battery.

Secondary battery including cathode material including irreversible additive, and method for manufacturing the same

Provided is a positive electrode for secondary battery including:

Positive electrode for secondary battery comprising flake graphite and secondary battery comprising the same

A battery cell includes a positive electrode, a negative electrode, and a separation film provided between the positive electrode and the negative electrode. A variation ratio of thickness of a battery cell before a pressurizing jig is disconnected and after the pressurizing jig is disconnected is equal to or less than 0.009, and the variation ratio of thickness of a battery cell is defied by a value generated by dividing a variation value of thickness that is a difference between the thickness of a battery cell after the pressurizing jig is disconnected and the thickness of a battery cell before the pressurizing jig is disconnected by the thickness of a battery cell before the pressurizing jig is disconnected.

Battery cell, secondary battery, and method of manufacturing battery cell

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Daejeon, South Korea

Ilhong Kim