Patents by Inventor Youichi Nanba
Youichi Nanba has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8623554Abstract: An electrode material comprising a particle containing at least one member selected from the particles containing silicon, tin, silicon compound and tin compound, and fibrous carbon. The particle includes: (1) a particle comprising at least one member of a silicon particle, tin particle, particle containing a lithium-ion-intercalatable/releasable silicon compound and particle containing a lithium-ion-intercalatable/releasable tin compound; or (2) a particle comprising a silicon and/or silicon compound-containing carbonaceous material deposited onto at least a portion of the surfaces of a carbon particle having a graphite structure. The lithium secondary battery using the electrode material as a negative electrode has high discharging capacity and is excellent in cycle characteristics and characteristics under a load of large current.Type: GrantFiled: January 15, 2010Date of Patent: January 7, 2014Assignee: Show A Denko K.K.Inventors: Youichi Nanba, Satoshi Iinou, Tsutomu Masuko
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Patent number: 7974074Abstract: The invention relates to a coin-type electric double-layered capacitor, including activated carbon electrode layers, an electrolytic solution, and a separator between a metal-made top vessel and a metal-made bottom vessel, and obtained by caulking and sealing the top vessel and the bottom vessel with a gasket and a sealing agent, wherein the edges of the top and bottom vessels overlap each other by 0.1 to 0.5 mm. Preferably, the injection amount of the electrolytic solution is in a range of 0.1 to 10% of the void volume in the electrode.Type: GrantFiled: April 24, 2007Date of Patent: July 5, 2011Assignee: Showa Denko K.K.Inventors: Youichi Nanba, Takashi Mori
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Patent number: 7964530Abstract: An activated carbon having the highest peak D within the range of 1.0 nm to 1.5 nm, in which the peak D is from 0.012 to 0.050 cm3/g and is from 2% to 32% to a total pore volume, in pore size distribution as calculated by BJH method from N2-adsorption isotherm at 77.4 K. An electric double layer capacitor comprising the polarizable electrode which comprises the activated carbon, carbon fiber, carbon black, and binder.Type: GrantFiled: September 27, 2006Date of Patent: June 21, 2011Assignee: Showa Denko K.K.Inventors: Youichi Nanba, Takashi Mori, Susumu Nakazaki
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Publication number: 20100296226Abstract: Disclosed is an electric double layer capacitor having a positive polarizable electrode and a negative polarizable electrode, each of the positive and negative polarizable electrodes having a polarizable electrode layer, the positive polarizable electrode layer containing carbon fibers P and activated carbon P, the negative polarizable electrode layer containing carbon fibers N and activated carbon N, wherein at least one of the carbon fibers P and carbon fibers N has at least one peak in the range of 1 to 2 nm in a pore distribution determined by BJH analysis using a nitrogen adsorption method, and the sum total of BET specific surface areas of the activated carbon P and the carbon fibers P is larger than the sum total of BET specific surface areas of the activated carbon N and the carbon fibers N.Type: ApplicationFiled: January 15, 2009Publication date: November 25, 2010Applicant: SHOWA DENKO K.K.Inventors: Youichi Nanba, Masako Tanaka, Takashi Mori
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Publication number: 20100178571Abstract: An electrode material comprising a particle containing at least one member selected from the particles containing silicon, tin, silicon compound and tin compound, and fibrous carbon. The particle includes: (1) a particle comprising at least one member of a silicon particle, tin particle, particle containing a lithium-ion-intercalatable/releasable silicon compound and particle containing a lithium-ion-intercalatable/releasable tin compound; or (2) a particle comprising a silicon and/or silicon compound-containing carbonaceous material deposited onto at least a portion of the surfaces of a carbon particle having a graphite structure. The lithium secondary battery using the electrode material as a negative electrode has high discharging capacity and is excellent in cycle characteristics and characteristics under a load of large current.Type: ApplicationFiled: January 15, 2010Publication date: July 15, 2010Applicant: SHOWA DENKO K.K.Inventors: Youichi Nanba, Satoshi Iinou, Tsutomu Masuko
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Patent number: 7674555Abstract: An electrode material comprising a particle containing at least one member selected from the particles containing silicon, tin, silicon compound and tin compound, and fibrous carbon. The particle includes: (1) a particle comprising at least one member of a silicon particle, tin particle, particle containing a lithium-ion-intercalatable/releasable silicon compound and particle containing a lithium-ion-intercalatable/releasable tin compound; or (2) a particle comprising a silicon and/or silicon compound-containing carbonaceous material deposited onto at least a portion of the surfaces of a carbon particle having a graphite structure. The lithium secondary battery using the electrode material as a negative electrode has high discharging capacity and is excellent in cycle characteristics and characteristics under a load of large current.Type: GrantFiled: November 25, 2003Date of Patent: March 9, 2010Assignee: Showa Denko K.K.Inventors: Youichi Nanba, Satoshi Iinou, Tsutomu Masuko
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Publication number: 20090154061Abstract: An electric double layer capacitor comprising: activated carbon electrode layers comprising an activated carbon, conductive adhesive layers, a separator, and electrolytic solution comprising non-aqueous solvent and electrolyte between a top vessel and a bottom vessel; in which the top vessel and the bottom vessel are sealed by being caulked with a gasket; in which the activated carbon layers are 0.3 mm or more in a thickness per a layer, not less than 0.55 g/cm3 and not more than 0.8 g/cm3 in an electrode density, and 250% or more in impregnation pickup of electrolytic solution.Type: ApplicationFiled: December 21, 2006Publication date: June 18, 2009Applicant: SHOWA DENKO K.K.Inventors: Youichi Nanba, Takashi Mori
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Publication number: 20090135547Abstract: The invention relates to a coin-type electric double-layered capacitor, including activated carbon electrode layers, an electrolytic solution, and a separator between a metal-made top vessel and a metal-made bottom vessel, and obtained by caulking and sealing the top vessel and the bottom vessel with a gasket and a sealing agent, wherein the edges of the top and bottom vessels overlap each other by 0.1 to 0.5 mm. Preferably, the injection amount of the electrolytic solution is in a range of 0.1 to 10% of the void volume in the electrode.Type: ApplicationFiled: April 24, 2007Publication date: May 28, 2009Applicant: SHOWA DENKO K.K.Inventors: Youichi Nanba, Takashi Mori
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Publication number: 20090080142Abstract: An activated carbon having the highest peak D within the range of 1.0 nm to 1.5 nm, in which the peak D is from 0.012 to 0.050 cm3/g and is from 2% to 32% to a total pore volume, in pore size distribution as calculated by BJH method from N2-adsorption isotherm at 77.4 K. An electric double layer capacitor comprising the polarizable electrode which comprises the activated carbon, carbon fiber, carbon black, and binder.Type: ApplicationFiled: September 27, 2006Publication date: March 26, 2009Applicant: SHOWA DENKO K.K.Inventors: Youichi Nanba, Takashi Mori, Susumu Nakazaki
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Publication number: 20060133980Abstract: The invention relates to a carbon material for forming a battery electrode, comprising carbon powder having a homogeneous structure which is produced by causing an organic compound, serving as a ra.w material of a polymer, to deposit onto and/or permeate into carbonaceous particles, and subsequently polymerizing the organic compound, followed by thermal treatment at a temperature of 1,800 to 3,300° C., which comprises a structure which is substantially uniform throughout the entirety of the particle from the surface to the central core where a graphite crystal structure region and an amorphous structure region are distributed. By using the material, a battery having high discharging capacity and low irreversible capacity, with excellent coulombic efficiency and excellent cycle characteristics can be fabricated. The carbon material of the invention may contain carbon fiber filaments. Average roundness, BET specific surface area, true density, laser Roman R value, and average particle size were investigated.Type: ApplicationFiled: June 4, 2004Publication date: June 22, 2006Inventors: Youichi Nanba, Masataka Takeuchi, Akinori Sudoh, Satoshi Iinou
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Publication number: 20060035149Abstract: An electrode material comprising a particle containing at least one member selected from the particles containing silicon, tin, silicon compound and tin compound, and fibrous carbon. The particle includes: (1) a particle comprising at least one member of a silicon particle, tin particle, particle containing a lithium-ion-intercalatable/releasable silicon compound and particle containing a lithium-ion-intercalatable/releasable tin compound; or (2) a particle comprising a silicon and/or silicon compound-containing carbonaceous material deposited onto at least a portion of the surfaces of a carbon particle having a graphite structure. The lithium secondary battery using the electrode material as a negative electrode has high discharging capacity and is excellent in cycle characteristics and characteristics under a load of large current.Type: ApplicationFiled: November 25, 2003Publication date: February 16, 2006Applicant: SHOW A DENKO K.K.Inventors: Youichi Nanba, Satoshi Iinou, Tsutomu Masuko
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Publication number: 20040124402Abstract: A negative electrode material comprising carbonaceous powder serving as a nucleus, and a carbon layer formed on the surface of the powder, characterized in that the carbon layer, when observed under a transmission electron microscope, has crystalline carbon regions and amorphous carbon regions in a bright-field image thereof, and that the ratio of the intensity of a peak at 1,360 cm−1 in a laser Raman spectrum of the carbon layer to that of a peak at 1,580 cm−1 in the spectrum is 0.3 or less. Also disclosed is a method for producing the negative electrode material, an electrode paste, an electrode, and a secondary battery including the electrode.Type: ApplicationFiled: December 18, 2003Publication date: July 1, 2004Applicant: SHOWA DENKO K.K.Inventors: Youichi Nanba, Satoshi Iinou, Akinori Sudo