Lg Chem, Ltd

Lg Energy Solution, Ltd.

Yeon Ji Oh

Chul Haeng Lee

Young Min Lim

Jung Min Lee

Yu Ha An

Hee Won Choi

Joo Yul Baek

Yi Jin Jung

Chan Ki Park

Disclosed is a negative electrode including a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material and a conductive agent. The negative electrode active material includes carbon-based active material particles including natural graphite and an amorphous carbon-based material. The carbon-based active material particles have a specific surface area of 1.4 m/g to 2.3 m/g, and the conductive agent includes carbon nanotubes having an average length of 1 μm to 12 μm. A secondary battery including the negative electrode is also disclosed.

Negative electrode and secondary battery including the negative electrode

A method for manufacturing a lithium secondary battery including the steps of manufacturing a lithium secondary battery including an electrode assembly, a non-aqueous electrolyte in which the electrode assembly is impregnated, and a battery case receiving the non-aqueous electrolyte; performing formation of the lithium secondary battery; and performing a degassing process for removing gas generated inside the lithium secondary battery, wherein the non-aqueous electrolyte includes a lithium salt, an organic solvent and 1,2,3-trifluorobenzene as an additive, wherein the 1,2,3-trifluorobenzene is included in an amount of 0.1 wt % to 10 wt % based on the total weight of the non-aqueous electrolyte, and the formation step is performed by charging the state of charge (SOC) of the battery up to 10% to 80%, while applying a voltage of 3.5 V to 4.5 V under a pressure of 0.5 kgf/cmto 5 kgf/cmat 45&#xb0; C. to 80&#xb0; C.

Lithium secondary battery having high-temperature storage properties and method for manufacturing the same

Growing community of inventors

Daejeon, South Korea

Yeon Ji Oh