Lg Energy Solution, Ltd.

Lg Chem, Ltd

Min Wook Lee

Sung Kyu Lee

Joo Hwan Sung

Seok Jin Oh

Ju Young Yun

Jin Young Park

Sung Kyun Kim

Hee Chang Youn

Ji Min Park

Ran Eun Lee

Hye In Ko

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

Min Wook Lee