Lg Chem, Ltd

Ji Hee Woo

Sang Hoon Choy

Dong Hyun Cho

Kyung Yeon Kang

Ye Lin Kim

Jong Heon Seol

The present invention provides: a conductive material dispersed liquid containing a conductive material, a dispersant, and a dispersion medium, wherein the conductive material comprises bundle-type carbon nanotubes having a bulk density in a range of 10-50 kg/mand a conductivity satisfying the conditions of Equation 1 below, thereby exhibiting excellent dispersibility and conductivity; and a lithium secondary battery, which is manufactured using the conductive material dispersed liquid and thus can exhibit excellent battery functions, especially, excellent output characteristics at low temperatures:&#x2212;&#x2264;10 log&#x2264;&#x2212;0.6&#x2003;&#x2003;[Equation 1]

Conductive material dispersed liquid and lithium secondary battery manufactured using the same

The present invention provides a conductive material for a secondary battery, and a secondary battery containing the same, the conductive material comprising carbon nanotubes, having a secondary structure in which carbon nanotube units having a diameter of 20-150 nm are entangled, having a ratio of true density to bulk density (TD/BD) of 30-120, having a metal content of 50 ppm or less, and having both excellent dispersibility and high purity, thereby being capable of improving, by increasing the conductivity within an electrode, battery performance, particularly, battery performance at room temperature and low temperature when applied to a battery.

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Daejeon, South Korea

Ji Hee Woo