Patents by Inventor Tadahiko Kubota

Tadahiko Kubota 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).

  • Nonaqueous electrolyte secondary battery
    Patent number: 8609286
    Abstract: The present application provides a nonaqueous electrolyte secondary battery that includes, a cathode capable of being electrochemically doped/dedoped with lithium, an anode capable of being electrochemically doped/dedoped with lithium, and an electrolyte placed between the cathode and the anode, wherein the electrolyte contains at least one of fluoro ethylene carbonate represented by Chemical Formula (1) and difluoro ethylene carbonate represented by Chemical Formula (2) as a solvent and the ratio of a discharge capacity B during discharging at a 5C rate to a discharge capacity A during discharging at a 0.2C rate ((B/A)×100) is 80% or more.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: December 17, 2013
    Assignee: Sony Corporation
    Inventors: Akira Yamaguchi, Kunihiko Hayashi, Tadahiko Kubota, Hiroyuki Suzuki, Akira Ichihashi, Yuzuru Fukushima, Hironori Sato, Masaki Kuratsuka, Hideto Watanabe, Kimio Tajima, Masahiro Miyamoto
  • ELECTROLYTIC SOLUTION, SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ELECTRIC POWER STORAGE SYSTEM, ELECTRIC POWER TOOL, AND ELECTRONIC APPARATUS
    Publication number: 20130330582
    Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution including a cyano compound, the cyano compound including a compound represented by R1-O—C(?O)—O—R2 (R1, R2, or both include a cyano-group-containing group), a compound represented by R3-C(?O)—O—R4 (R4 includes the cyano-group-containing group), or both.
    Type: Application
    Filed: June 3, 2013
    Publication date: December 12, 2013
    Inventors: Masayuki Ihara, Tadahiko Kubota
  • SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ELECTRIC POWER STORAGE SYSTEM, ELECTRIC POWER TOOL, AND ELECTRONIC APPARATUS
    Publication number: 20130273406
    Abstract: A secondary battery includes: a cathode and an anode that are opposed to each other with a separator in between; and an electrolytic solution. The cathode includes a cathode active material layer on a cathode current collector. The anode includes an anode active material layer on an anode current collector. A heat-resistant layer is provided at least in a region in which the cathode active material layer and the anode active material layer are opposed to each other between the cathode and the anode. The heat-resistant layer includes a material having a higher melting point or higher decomposition temperature than a melting point or decomposition temperature of the separator. The electrolytic solution includes an unsaturated cyclic ester carbonate.
    Type: Application
    Filed: April 4, 2013
    Publication date: October 17, 2013
    Applicant: Sony Corporation
    Inventors: Masayuki Ihara, Tadahiko Kubota
  • Nonaqueous electrolyte and nonaqueous electrolyte battery
    Patent number: 8481205
    Abstract: A nonaqueous electrolyte includes: a nonaqueous solvent; an electrolyte salt; a hydrocarbon compound having a nitrile group; and at least one of a heteropolyacid and a heteropolyacid compound.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: July 9, 2013
    Assignee: Sony Corporation
    Inventors: Ichiro Yamada, Shunsuke Saito, Haruo Watanabe, Tadahiko Kubota
  • ELECTROLYTIC SOLUTION, SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ELECTRIC POWER STORAGE SYSTEM, ELECTRIC POWER TOOL, AND ELECTRONIC DEVICE
    Publication number: 20130089778
    Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution. The electrolytic solution includes a cyano cyclic ester carbonate represented by Formula (1) described below and one or more of compounds represented by Formula (2) to Formula (6) described below.
    Type: Application
    Filed: September 13, 2012
    Publication date: April 11, 2013
    Applicant: Sony Corporation
    Inventors: Masayuki Ihara, Tadahiko Kubota
  • ELECTROLYTIC SOLUTION, SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ELECTRIC POWER STORAGE SYSTEM, ELECTRIC POWER TOOL, AND ELECTRONIC DEVICE
    Publication number: 20130089779
    Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution, wherein the electrolytic solution includes a cyano cyclic ester carbonate represented by Formula (1) described below, where each of R1 to R3 is one of a hydrogen group, a halogen group, a cyano group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group; arbitrary two or more of the R1 to the R3 are allowed to be bonded to each other; and when the total number of cyano groups is 1, one or more of the R1 to the R3 each are a halogen group, a monovalent halogenated hydrocarbon group, or a monovalent halogenated oxygen-containing hydrocarbon group.
    Type: Application
    Filed: September 14, 2012
    Publication date: April 11, 2013
    Applicant: SONY CORPORATION
    Inventors: Masayuki Ihara, Tadahiko Kubota
  • Electrolytic solution and battery
    Patent number: 8404389
    Abstract: A battery capable of improving the storage characteristics and the cycle characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. A solvent of the electrolytic solution contains a given sulfone compound such as bis(trimethylsilyl)methanedisulfonate. Compared to a case that a solvent contains other sulfone compound such as bis(methyl)methanedisulfonate, the chemical stability of the electrolytic solution is improved, and the decomposition reaction of the electrolytic solution is prevented.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: March 26, 2013
    Assignee: Sony Corporation
    Inventors: Masayuki Ihara, Hiroyuki Yamaguchi, Tadahiko Kubota
  • Anode and method of manufacturing same, secondary battery and method of manufacturing same, and sulfone compound
    Patent number: 8394540
    Abstract: A secondary battery capable of improving the cycle characteristics is provided. The secondary battery includes a cathode and an anode oppositely arranged with a separator in between, and an electrolytic solution. At least one of the cathode, the anode, the separator, and the electrolytic solution contains a sulfone compound having a carbonate group and a sulfonyl group.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: March 12, 2013
    Assignee: Sony Corporation
    Inventors: Hiroyuki Yamaguchi, Masayuki Ihara, Tadahiko Kubota
  • SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ENERGY STORAGE SYSTEM, ELECTRIC POWER TOOL, AND ELECTRONIC UNIT
    Publication number: 20130059178
    Abstract: A secondary battery includes: a cathode, an anode, and a nonaqueous electrolytic solution in a package member having a flat surface, in which the nonaqueous electrolytic solution includes a methylene cyclic carbonate represented by an expression (1): where R1 and R2 each are a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, an oxygen-containing monovalent hydrocarbon group, or an oxygen-containing monovalent halogenated hydrocarbon group, and R1 and R2 may be bonded to each other.
    Type: Application
    Filed: September 4, 2012
    Publication date: March 7, 2013
    Applicant: SONY CORPORATION
    Inventors: Masayuki Ihara, Tadahiko Kubota
  • ELECTROLYTIC SOLUTION FOR SECONDARY BATTERY, SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ELECTRIC POWER STORAGE SYSTEM, ELECTRIC POWER TOOL, AND ELECTRONIC DEVICE
    Publication number: 20130059194
    Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution. The electrolytic solution includes an unsaturated six-membered ring ester carbonate represented by Formula (1) described below, or an unsaturated six-membered ring ester carbonate represented by Formula (2) described below, or both, where each of W, X, and Y is one of >C?CR1R2 and >CR3R4; each of R1 to R4 is a hydrogen group or the like; arbitrary two or more of R1 to R4 are allowed to be bonded with each other; and one or more of W, X, and Y are >C?CR1R2, where Z is one of >C?CR7R8 and >CR9R10; each of R5 to R10 is a hydrogen group or the like; and arbitrary two or more of R5 to R10 are allowed to be bonded with each other.
    Type: Application
    Filed: August 20, 2012
    Publication date: March 7, 2013
    Applicant: SONY CORPORATION
    Inventors: Masayuki Ihara, Tadahiko Kubota
  • Nonaqueous electrolytic solution, positive electrode and nonaqueous electrolyte secondary battery
    Patent number: 8389164
    Abstract: A nonaqueous electrolytic solution includes an electrolyte salt dissolved in a nonaqueous solvent, wherein the nonaqueous electrolyte solution contains at least one compound selected from the group consisting of a chain compound having a hydroxyl group and a carbon-carbon double bond, a light metal alkoxide thereof and a derivative thereof obtained by substituting the hydroxyl group with a protective group.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: March 5, 2013
    Assignee: Sony Corporation
    Inventors: Kentaro Yoshimura, Tadahiko Kubota
  • ELECTROLYTIC SOLUTION, SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ELECTRIC POWER STORAGE SYSTEM, ELECTRIC POWER TOOL, AND ELECTRONIC DEVICE
    Publication number: 20130052524
    Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution. The electrolytic solution includes an allene compound having a tetravalent skeleton represented by Formula (1) described below.
    Type: Application
    Filed: August 13, 2012
    Publication date: February 28, 2013
    Applicant: SONY CORPORATION
    Inventors: Ichiro Yamada, Tadahiko Kubota
  • SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ELECTRIC POWER STORAGE SYSTEM, POWER TOOL, AND ELECTRONIC APPLIANCE
    Publication number: 20130052523
    Abstract: A secondary battery includes: an electrolytic solution; a positive electrode; and a negative electrode, at least one of the positive electrode, the negative electrode, and the electrolytic solution containing an alkyl carbonate represented by the following formula (1) R—O—C(?O)—O—X ??(1) wherein R is a linear alkyl group or halogenated alkyl group having a carbon number of from 8 to 20, or a branched alkyl group or halogenated alkyl group having a carbon number of from 8 to 20 in a main chain thereof; and X is an alkali metal element.
    Type: Application
    Filed: August 17, 2012
    Publication date: February 28, 2013
    Applicant: Sony Corporation
    Inventors: Ichiro Yamada, Tadahiko Kubota
  • SECONDARY BATTERY, ELECTROLYTIC SOLUTION, BATTERY PACK, ELECTRONIC DEVICE, AND ELECTRICAL VEHICLE
    Publication number: 20130052543
    Abstract: A secondary battery capable of improving cycle characteristics, conservation characteristics, and load characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with an electrolytic solution. The electrolytic solution includes one or more of a dicarbonic ester compound, a dicarboxylic compound, a disulfonic compound, a monofluoro lithium phosphate, and difluoro lithium phosphate and one or more of fluorinated lithium phosphate, fluorinated lithium borate, and imide lithium.
    Type: Application
    Filed: December 2, 2010
    Publication date: February 28, 2013
    Applicant: Sony Corporation
    Inventors: Masayuki Ihara, Yuko Hayakawa, Tadahiko Kubota
  • Electrolytic solution and secondary battery
    Patent number: 8377597
    Abstract: A secondary battery capable of improving the cycle characteristics and the storage characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution contains a solvent contains a sulfone compound having a structure in which —S(?O)2—S—C(?O)— bond is introduced to a benzene skeleton and an ester carbonate halide.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: February 19, 2013
    Assignee: Sony Corporation
    Inventors: Masayuki Ihara, Hiroyuki Yamaguchi, Tadahiko Kubota
  • Battery having an electrolytic solution containing difluoroethylene carbonate
    Patent number: 8377598
    Abstract: A battery capable of obtaining the high energy density and obtaining the superior cycle characteristics is provided. In an anode, the thickness of a single face of an anode active material layer containing a carbon material as an anode active material is from 75 ?m to 120 ?m. An electrolytic solution contains difluoroethylene carbonate as a solvent. Thereby, the energy density of the anode is improved, and the diffusion and the acceptance of lithium ions in the anode are improved.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: February 19, 2013
    Assignee: Sony Corporation
    Inventors: Shinya Wakita, Izaya Okae, Hiroyuki Yamaguchi, Tadahiko Kubota
  • NONAQUEOUS ELECTROLYTIC SOLUTION, NONAQUEOUS ELECTROLYTIC SECONDARY BATTERY, BATTERY PACK, ELECTRONIC DEVICE, ELECTRIC VEHICLE, POWER STORAGE DEVICE, AND POWER SYSTEM
    Publication number: 20130034759
    Abstract: A nonaqueous electrolytic secondary battery includes: a positive electrode; a negative electrode; and an electrolyte that contains a nonaqueous electrolytic solution, wherein the nonaqueous electrolytic solution contains at least one phosphorus compound selected from the group consisting of phosphine oxide, phosphonic ester, and phosphinic ester, and the phosphine oxide, the phosphonic ester, and the phosphinic ester are phosphorus compounds represented by the following formulae (I), (II), and (III), respectively.
    Type: Application
    Filed: July 26, 2012
    Publication date: February 7, 2013
    Applicant: SONY CORPORATION
    Inventors: Yusuke Funada, Tadahiko Kubota
  • Anode with lithium containing ionic polymer coat, method of manufacturing same, secondary battery, and method of manufacturing same
    Patent number: 8367251
    Abstract: A secondary battery capable of improving the cycle characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode has an anode current collector, an anode active material layer that is provided on the anode current collector, and contains an anode active material containing at least one of a simple substance of silicon, an alloy of silicon, a compound of silicon, a simple substance of tin, an alloy of tin, and a compound of tin, and a coat that is provided on the anode active material layer, and contains an ionic polymer containing lithium.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: February 5, 2013
    Assignee: Sony Corporation
    Inventors: Toru Odani, Hiroyuki Yamaguchi, Masayuki Ihara, Tadahiko Kubota
  • NONAQUEOUS ELECTROLYTE BATTERY, BATTERY PACK, ELECTRONIC DEVICE, ELECTRIC VEHICLE, POWER STORAGE DEVICE, AND POWER SYSTEM
    Publication number: 20120316716
    Abstract: A nonaqueous electrolyte battery includes: an electrode group including a positive electrode and a negative electrode; and a nonaqueous electrolyte including an electrolytic solution, the electrode group including an insulating layer, the insulating layer containing a ceramic, the electrolytic solution including an electrolyte salt and an additive, the electrolyte salt including the compound of formula (1), and the additive being at least one of the compounds of formulae (2) to (14), and the compound of formula (1) being contained in 0.001 mol/L to 2.5 mol/L with respect to the electrolytic solution.
    Type: Application
    Filed: May 31, 2012
    Publication date: December 13, 2012
    Applicant: SONY CORPORATION
    Inventors: Toru Odani, Tadahiko Kubota
  • Electrolytic solution and battery
    Patent number: RE44489
    Abstract: A battery capable of improving battery characteristics such as cycle characteristics is provided. An electrolytic solution is impregnated in a separator. The electrolytic solution contains 4-fluoro-1,3-dioxolane-2-one. Fluorine ion content in the electrolytic solution is preferably from 10 weight ppm to 3200 weight ppm. Thereby, chemical stability of the electrolytic solution is improved, and cycle characteristics are improved. The present invention is effective for the case using an anode active material containing Sn or Si as an element for an anode.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: September 10, 2013
    Assignee: Sony Corporation
    Inventors: Akira Yamaguchi, Tadahiko Kubota, Atsumichi Kawashima, Akinori Kita, Satoshi Mizutani, Hiroshi Inoue