Lg Energy Solution, Ltd.

Hee Chang Youn

Minchul Jang

Joo Hwan Sung

InSung Uhm

Sung Chul Lim

Ji Min Park

Ju Young Yun

Seok Jin Oh

Min Wook Lee

Jin Young Park

Junghun Choi

Yonghee Kang

Ran Eun Lee

Hye In Ko

Provided is an irreversible additive contained in a cathode material for a secondary battery, wherein the irreversible additive is an oxide represented by the following Chemical Formula 1, and wherein the oxide has a trigonal crystal structure, a cathode material including the same, and a secondary battery including the cathode material,LiNiMO  (1)

Additive comprised in cathode material for secondary battery, cathode material comprising the same, and secondary battery comprising cathode material

Provided is an irreversible additive contained in a cathode material for a secondary battery, wherein the irreversible additive being an oxide represented by the following Chemical Formula 1, and wherein the oxide has a monoclinic crystal structure, a cathode material including the same, and a secondary battery including the cathode material:LiCuMO  (1)

Irreversible additive comprised in cathode material for secondary battery, cathode material comprising the same, and secondary battery comprising cathode material

The present disclosure relates to a lithium secondary battery with improved safety during thermal runaway. The lithium secondary battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and an electrolyte, and has a nominal voltage of 3.68 V or greater, and Vrepresented by Equation (1) below is 4 mbar·Ah−1·sec−1 or less: Equation (1): V=ΔP/(t×C).

Lithium secondary battery

The present disclosure relates to a lithium secondary battery with improved safety during thermal runaway. The lithium secondary battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and an electrolyte, and has a nominal voltage of 3.68 V or greater, and Vrepresented by Equation (1) below measured after manufacturing a test module by stacking four of the lithium secondary battery fully charged by being charged to 4.35 V is 4 Ah/sec or less: Equation (1): V=C/t.

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Daejeon, South Korea

Hee Chang Youn