Korea Kumho Petrochemical Co., Ltd.

Hyun Kyung Sung

Kwanyoung Lee

Hyun Jung Kim

Dong Hwan Kim

Young Chan Jang

Sang Hyo Ryu

Chung Heon Jeong

Ki Hong Kim

Dong Hoon Oh

Hosull Lee

Eun Joo Park

Provided is a catalyst for manufacturing multi-wall carbon nanotubes, the catalyst including metal components according to &#x3c;Equation&#x3e; Ma:Mb=x:y, and having a hollow structure with a thickness of 0.5-10 &#x3bc;m. In the above equation, Ma represents at least two metals selected from Fe, Ni, Co, Mn, Cr, Mo, V, W, Sn, and Cu; Mb represents at least one metal selected from Mg, Al, Si, and Zr; x and y each represent the molar ratio of Ma and Mb; and x+y=10, 2.0&#x2264;x&#x2264;7.5, and 2.5&#x2264;y&#x2264;8.0.

Catalyst for mass production of multi-wall carbon nanotubes

A method for manufacturing multi-wall carbon nanotubes, includes the steps of: (a) dissolving a metal precursor in a solvent to prepare a precursor solution; (b) perform thermal decomposition while spraying the precursor solution into a reactor, thereby forming a catalyst powder; and (c) introducing the catalyst powder into a fluidized-bed reactor heated to 600-900&#xb0; C. and spraying a carbon-based gas and a carrier gas to synthesize multi-wall carbon nanotubes from the catalyst powder, wherein steps (a) to (c) are performed in a continuous type and wherein the catalyst powder contains metal components according to equation 1 below. &#x3c;Equation 1&#x3e; Ma:Mb=x:y, wherein Ma represents at least two metals selected from Fe, Ni, Co, Mn, Cr, Mo, V, W, Sn, and Cu; Mb represents at least one metal selected from Mg, Al, Si, and Zr; x and y each represent the molar ratio of Ma and Mb; and x+y=10, 2.0&#x2264;x&#x2264;7.5, and 2.5&#x2264;y&#x2264;8.0.

Method for manufacturing multi-wall carbon nanotubes using continuous type process

According to one aspect of the present invention, carbon nanotubes whose diameter, length, crystallinity, purity and the like are adjusted to predetermined ranges are added to a thermoplastic resin, and thus the thermoplastic resin can be provided with improved electrical conductivity.

Conductive resin composition and plastic molded product using the same

The present invention relates to a method for preparing homo- and co-polymers having high molecular weights in high yields by polymerizing cyclic olefin compounds using a complex prepared by mixing a nickel salt compound, an organoaluminoxane compound, and at least one organic boron compound.

Method for preparing homo-and co-polymers of cyclic olefin compounds using an organic boron compound as a catalyst activator

The present invention provides a method for preparing homo- and co-polymers by polymerizing cyclic olefin compounds using addition polymerization. The method can produce a cyclic olefin polymer having a high molecular weight with a high yield in the presence of, as an addition polymerization catalyst, a complex prepared by mixing a nickel salt compound and an organoaluminoxane compound with at least one fluorine-containing aromatic hydrocarbon compound represented by the following formula 1 or 2 as a catalyst activator:CRHFormula 1

Method for preparing a homo-and co-polymers by polymerization of cyclic olefin compounds using fluorine-containing aromatic hydrocarbon compound as catalyst activator

The present invention relates to a method for preparing homo- and co-polymers having high molecular weights in high yields by polymerizing cyclic olefin compounds using a complex prepared by mixing a nickel salt compound, an organoaluminoxane compound, and at least one fluorine-containing compound.

Method for preparing homo-and co-polymers of cyclic olefin compounds

Cathode including transition metal/matrix polymer composition and a secondary polymer battery therefrom

The present invention relates to a novel sulfurated hydrocarbon material having electrochemical activity, high capacity, and good reversibility, which can be used as an electrode material for the secondary battery. More particularly, it relates to a sulfurated hydrocarbon material, which is prepared by the sulfuration of the olefinic unsaturated hydrocarbon, in the presence of a amine promoter. The sulfurated hydrocarbon material contains from 40 to 88% of sulfur and is represented by the formula (CH S ) , wherein: x is a real number in the range of 0.5&lE;x&lE;1.75; y is a real number in the range of 0.2&lE;y&lE;3.2; and z is an integer equal to or greater than 5. Also, the present invention provides a secondary battery comprising i) a positive electrode comprising said sulfurated hydrocarbon compound; ii) a polymer electrolyte; and iii) a negative electrode made of alkali metal or alkali metal alloy.

Sulfurated hydrocarbon materials having high capacity and secondary cells using the same

The present invention relates to an improved secondary battery having high weight energy density and good reversibility, more specifically, a battery containing i) a positive electrode comprising a reversible positive electrode material containing an organosulfur compound wherein sulfur-sulfur bond is formed upon oxidation and sulfur-sulfur bond is cleaved upon electrolytic reduction, an electroactive component selected from main group elements compound, electrically conductive ingredients and a current collector containing copper metal; ii) a polymer electrolyte having lithium salt; and iii) a negative electrode made of lithium metal, lithium alloy or lithium intercalating carbon.

High capacity composite electrode and secondary cell therefrom

The present invention relates to an improved secondary battery having high weight energy density and good reversibility, more specifically, a battery containing i) a positive electrode comprising a reversible positive electrode material containing an organosulfur compound wherein sulfur--sulfur bond is formed upon oxidation and sulfur--sulfur bond is cleaved upon electrolytic reduction, a metallic compound, and a current collector containing copper metal; ii) a polymer electrolyte having lithium salt; and iii) a negative electrode made of lithium metal, lithium alloy or lithium intercalating carbon.

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Daejeon, South Korea

Hyun Kyung Sung