Lg Chem, Ltd

Eui Yong Hwang

Won Jong Kwon

Kwon Nam Sohn

In Young Kim

Kil Sun Lee

Seung Bo Yang

Jin Yeong Lee

Yong Ju Lee

Je Young Kim

Jung Woo Yoo

Byung Hun Oh

Su Jin Park

Mi Jin Lee

Kwang Hyun Yoo

The present invention relates to a method of producing hollow carbon capsules which can simply and effectively produce hollow carbon capsule by using polymer particles as soft templates and using a spray-drying method.

Method for producing hollow carbon capsules

Provided are a porous silicon-carbon composite, which includes a core including a plurality of active particles, a conductive material formed on at least a portion of surfaces of the active particles, first pores, and second pores, and a first shell layer which is coated on the core and includes graphene, wherein the active particles include a plurality of silicon particles, silicon oxide particles, or a combination thereof, the first pores are present in the core and are formed by agglomeration of the plurality of active particles, and the second pores are irregularly dispersed and present in the core, has an average particle diameter smaller than an average particle diameter of the active particles, and are spherical, a method of manufacturing the same, and a negative electrode and a lithium secondary battery including the porous silicon-carbon composite.

Graphene-coated porous silicon-carbon composite and method of manufacturing the same

The present invention relates to a method for preparing carbon nanotubes which are capable of more effectively preparing carbon nanotubes having a uniform and fine size, and a dispersion composition of carbon nanotubes obtained using the same. The method for preparing carbon nanotube comprises the steps of: forming a dispersion comprising carbon nanotube bundles, a dispersant and a solvent; and enabling the dispersion to consecutively pass through a high pressure homogenizer, wherein the dispersant is a mixture of plural kinds of polyaromatic hydrocarbon oxides, and the carbon nanotube bundles are pulverized or disentangled while passing through a microchannel of the high pressure homogenizer under a shear force to form carbon nanotubes.

Method for preparing carbon nanotube, and dispersion composition of carbon nanotube

Provided are an anode active material including carbon-based particles, silicon nanowires grown on the carbon-based particles, and a carbon coating layer on surfaces of the carbon-based particles and the silicon nanowires, and a method of preparing the anode active material. Since the anode active material of the present invention is used in a lithium secondary battery, physical bonding force between the carbon-based particles and the silicon nanowires may not only be increased but conductivity may also be improved. Thus, lifetime characteristics of the battery may be improved.

Anode active material for lithium secondary battery, preparation method thereof, and lithium secondary battery comprising the same

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Daejeon, South Korea

Eui Yong Hwang