Abstract:
A method for producing nanostructured carbon material, including (a) combusting hydrocarbon fuel in an oxygen-enriched environment to produce combustion products having a temperature of 1,000-3,150° C.; (b) forming a postcombustion gas stream having a velocity of 40-800 m/s; (c) forming a working mixture by introducing hydrocarbon feedstock and a catalyst precursor for carbon nanostructures growth into the postcombustion gas stream; (d) introducing the working mixture into a reaction zone, wherein the reaction zone is maintained at a temperature of 900-2,300° C., and wherein the catalyst precursor is decomposed into catalyst particles, while the hydrocarbon feedstock is decomposed to form carbon nanostructures and gaseous products; and (e) separating carbon nanostructures from the gaseous products of the decomposition of hydrocarbon feedstock.
Abstract:
A composition for an electrochemical device, the composition containing a single-walled carbon nanotube, a binder and a solvent. The binder contains a fluorine-containing copolymer containing a vinylidene fluoride unit and a fluorinated monomer unit other than the vinylidene fluoride unit, and the content of the vinylidene fluoride unit in the fluorine-containing copolymer is 50.0 mol % or more relative to total monomer units. Also disclosed is a positive electrode mixture including the composition and a positive electrode structure including a current collector and the positive electrode mixture layer provided on one or both sides of the current collector.
Abstract:
Provided is a composition, comprising single-walled carbon nanotube, a binder, and a specific solvent, wherein the binder contains a fluorine-containing polymer containing a vinylidene fluoride unit.
Abstract:
Provided is a composition for an electrochemical device, containing a single-walled carbon nanotube, a binder, and a solvent, wherein the binder comprises a fluorine-containing copolymer comprising a repeating unit (a) based on vinylidene fluoride, and at least one repeating unit (b) selected from the group consisting of a repeating unit (b1) and a repeating unit (b2).
Abstract:
Provided is a negative electrode mixture containing a single-walled carbon nanotube, a negative electrode active material, and a binder, in which the negative electrode mixture contains, as the negative electrode active material, a negative electrode active material that exhibits a potential of 2.5 V or less vs. Li when alloyed with Li or bonded with Li, and the binder contains a fluorine-containing copolymer containing vinylidene fluoride unit and a unit of an other monomer other than vinylidene fluoride.
Abstract:
A binder containing a mixed powder including a polytetrafluoroethylene resin and a single-walled carbon nanotube. A weight ratio of the polytetrafluoroethylene resin to the single-walled carbon nanotube is 99.9:0.1 to 80:20. Also disclosed is a composition for producing an electrode in a form of a powder including the binder and an electrode active material substantially free of a liquid medium; an electrode mixture including the composition for producing an electrode; an electrode using the electrode mixture; a secondary battery having the electrode; a method for producing the binder; and a method for producing the electrode.
Abstract:
A system and method for producing carbon nano-structures. The proposed method allows for producing carbon nano-structures on a commercial scale, while reducing the degree of agglomeration and the influence of the walls of the reaction chamber on the process, as well as increasing control over the process of preparation of the nano-structures. A method for producing carbon nano-structure by decomposition of hydrocarbon gases in the reaction chamber in the presence of a catalyst includes preparing a working mixture, wherein the mixture includes nano-particles comprising a catalyst substance, a carrier gas and gaseous hydrocarbons; feeding the reaction mixture into the reaction chamber; discharging carbon nano-structures from the reaction chamber in a stream of gaseous products of hydrocarbon decomposition; and separating carbon nano-structures from gaseous products of hydrocarbon decomposition.