Patents by Inventor Hiroyoshi Take

Hiroyoshi Take 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).

  • Publication number: 20210328223
    Abstract: An active material (1) for a positive electrode includes an aggregate (10) of an electrochemically active polymer having an oxidized repeat unit and a reduced repeat unit. The aggregate (10) includes a first portion (11) forming a surface of the aggregate 10 and a second portion 12 covered by the first portion 11. In the active material 1, the percentage content of the oxidized repeat unit in the first portion 11 on a weight basis is lower than the percentage content of the oxidized repeat unit in the second portion 12 on a weight basis.
    Type: Application
    Filed: June 25, 2019
    Publication date: October 21, 2021
    Inventors: Chisato GOTO, Masaya YANO, Hiroyoshi TAKE
  • Publication number: 20210233720
    Abstract: A positive electrode for a power storage device includes: an active material layer; a current collector; and an electrically conductive layer. The active material layer includes an electrochemically active polymer and an electrically conductive agent. The electrically conductive layer is disposed between the active material layer and the current collector and is in contact with the active material layer and the current collector. The thickness of the electrically conductive layer is measured at 10 points spaced apart at 2 ?m intervals along a boundary between the current collector and the electrically conductive layer on a cross-section of the positive electrode for a power storage device. The cross-section is perpendicular to a principal surface of the current collector, and the electrically conductive layer is in contact with the principal surface. The average thickness of the electrically conductive layer determined by this measurement is 0.5 to 3.0 ?m.
    Type: Application
    Filed: April 25, 2019
    Publication date: July 29, 2021
    Inventors: Masaya YANO, Hiroyoshi TAKE, Chisato GOTO, Kengo YAMAUCHI
  • Publication number: 20210193399
    Abstract: A positive electrode 1 for a power storage device includes: an active material layer 10; a current collector 20; and an electrically conductive layer 30. The active material layer 10 includes electrochemically active polymer particles 12 and an electrically conductive agent 14. The electrochemically active polymer particles 12 have an average particle diameter of more than 0.5 ?m and 20 ?m or less. The electrically conductive layer 30 is disposed between the active material layer 10 and the current collector 20 and is in contact with the active material layer 10 and the current collector 20.
    Type: Application
    Filed: April 25, 2019
    Publication date: June 24, 2021
    Inventors: Masaya YANO, Hiroyoshi TAKE, Chisato GOTO, Kengo YAMAUCHI
  • Publication number: 20210118625
    Abstract: A positive electrode 1 for a power storage device includes: an active material layer 10; a current collector 20; and an electrically conductive layer 30. The active material layer 10 includes an electrochemically active polymer 12 and an electrically conductive agent 14. The electrically conductive layer 30 is disposed between the active material layer 10 and the current collector 20 and is in contact with the active material layer 10 and the current collector 20. The electrically conductive layer 30 includes electrically conductive particles 32 and a binder 35 in contact with outer surfaces of the electrically conductive particles 32. The content of the binder in the electrically conductive layer 30 is 3% or more on a mass basis.
    Type: Application
    Filed: April 25, 2019
    Publication date: April 22, 2021
    Inventors: Masaya YANO, Hiroyoshi TAKE, Chisato GOTO, Kengo YAMAUCHI
  • Patent number: 10930926
    Abstract: The invention provides a cathode sheet for use in a nonaqueous electrolyte secondary battery, including a composite material comprising a collector and a layer of a cathode active material provided thereon. The layer of a cathode active material includes: (a) a conductive polymer and (b) at least one selected from a polycarboxylic acid and a metal salt of a polycarboxylic acid; and the conductive polymer is a polymer in a dedoped state or in a dedoped and reduced state. The polymer constituting the conductive polymer is at least one selected from polyaniline, a polyaniline derivative, polypyrrole, a polypyrrole derivative, and polythiophene; and the polycarboxylic acid is at least one selected from polyacrylic acid, polymethacrylic acid, polyvinylbenzoic acid, polyallylbenzoic acid, polymethallylbenzoic acid, polymaleic acid, polyfumaric acid, polyglutaminic acid, polyaspartic acid, alginic acid, carboxymethylcellulose, and a copolymer including repeating units of at least two of the polymers listed herein.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: February 23, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Masao Abe, Akira Otani, Yujiro Kawashima, Yoshihiro Uetani, Hiroyoshi Take, Yutaka Kishii, Aimi Matsuura, Yuki Kajisa, Yohei Ando
  • Publication number: 20190267627
    Abstract: A power storage device positive electrode having an excellent activation property from the initial charge/discharge stage, and a power storage device employing the positive electrode are provided. The power storage device positive electrode includes an active material including at least one of polyaniline and a polyaniline derivative, a conductive agent, and a binder, wherein the active material including at least one of the polyaniline and the polyaniline derivative has a polyaniline oxidant proportion of not less than 45 wt. % based on the overall weight of the polyaniline active material, wherein the binder has Hansen solubility parameters such that the sum of a polarity term and a hydrogen bonding term is not greater than 20 MPa1/2.
    Type: Application
    Filed: July 28, 2017
    Publication date: August 29, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroyoshi Take, Masaya Yano, Tooru Sugitani, Chisato Goto, Hisae Shimizu
  • Patent number: 10230097
    Abstract: A nonaqueous electrolyte secondary battery is provided, which includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and negative electrode, and an electrolyte solution containing a supporting salt having ion conductivity, wherein the positive electrode comprises a composition containing components (a) and (b) below and satisfying a requirement (?) below, and wherein the negative electrode contains metal lithium and at least one selected from materials capable of lithium ion insertion/desorption: (a) an electrically conductive polymer; (b) a lithium salt formed by substituting a part of a polyanionic acid with lithium; and (?) a molar ratio of a lithium element content in the component (b) to a content of an element involved in a charge/discharge reaction in the component (a) is 0.1 to 1.0. Consequently, the nonaqueous electrolyte secondary battery has an excellent weight energy density and can reduce dependency on electrolyte solution amount.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: March 12, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Hiroyoshi Take, Atsuko Mizuike, Aimi Matsuura, Masao Abe
  • Publication number: 20170317345
    Abstract: The invention provides a cathode sheet for use in a nonaqueous electrolyte secondary battery, including a composite material comprising a collector and a layer of a cathode active material provided thereon. The layer of a cathode active material includes: (a) a conductive polymer and (b) at least one selected from a polycarboxylic acid and a metal salt of a polycarboxylic acid; and the conductive polymer is a polymer in a dedoped state or in a dedoped and reduced state. The polymer constituting the conductive polymer is at least one selected from polyaniline, a polyaniline derivative, polypyrrole, a polypyrrole derivative, and polythiophene; and the polycarboxylic acid is at least one selected from polyacrylic acid, polymethacrylic acid, polyvinylbenzoic acid, polyallylbenzoic acid, polymethallylbenzoic acid, polymaleic acid, polyfumaric acid, polyglutaminic acid, polyaspartic acid, alginic acid, carboxymethylcellulose, and a copolymer including repeating units of at least two of the polymers listed herein.
    Type: Application
    Filed: July 6, 2017
    Publication date: November 2, 2017
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masao ABE, Akira OTANI, Yujiro KAWASHIMA, Yoshihiro UETANI, Hiroyoshi TAKE, Yutaka KISHII, Aimi MATSUURA, Yuki KAJISA, Yohei ANDO
  • Patent number: 9735423
    Abstract: The invention provides a nonaqueous electrolyte secondary battery having a cathode and an anode arranged so as to be opposite to each other, and an electrolyte layer put therebetween; wherein the cathode comprises: (a) a conductive polymer and (b) at least one selected from the group consisting of a polycarboxylic acid and a metal salt thereof, and wherein the anode comprises a material into which a base metal or ions thereof can be inserted and from which a base metal or ions thereof can be extracted. The invention further provides a cathode sheet for use in the nonaqueous electrolyte secondary battery mentioned above.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: August 15, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Masao Abe, Akira Otani, Yujiro Kawashima, Yoshihiro Uetani, Hiroyoshi Take, Yutaka Kishii, Aimi Matsuura, Yuki Kajisa, Yohei Ando
  • Publication number: 20150340698
    Abstract: A positive electrode for a nonaqueous electrolyte secondary battery containing an electrically conductive polymer (a), at least one of a polyanionic acid and a metal salt thereof (b), and a plasticizer (c), wherein the nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and an electrolyte solution having ion conductivity. The positive electrode has excellent peeling resistance and bending durability, and the nonaqueous electrolyte secondary battery having an excellent weight energy density and low dependency on electrolyte solution amount is provided.
    Type: Application
    Filed: December 24, 2013
    Publication date: November 26, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroyoshi TAKE, Aimi MATSUURA, Yohei ANDO
  • Publication number: 20150325857
    Abstract: A nonaqueous electrolyte secondary battery is provided, which includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and an electrolyte solution containing a supporting salt having ionic conductivity, wherein the positive electrode contains an electrically conductive polymer, the negative electrode contains a carbonaceous material capable of lithium ion insertion/desertion, and the electrolyte solution contains a negative electrode film-forming agent. Consequently, the nonaqueous electrolyte secondary battery, which uses the electrically conductive polymer in the positive electrode and the carbonaceous material in the negative electrode, has an excellent weight energy density and can effectively suppress deterioration of battery performance.
    Type: Application
    Filed: December 10, 2013
    Publication date: November 12, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroyoshi TAKE, Yuki KAJISA, Masao ABE, Yoshihiro UETANI
  • Publication number: 20150318540
    Abstract: A nonaqueous electrolyte secondary battery is provided, which includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and negative electrode, and an electrolyte solution containing a supporting salt having ion conductivity, wherein the positive electrode comprises a composition containing components (a) and (b) below and satisfying a requirement (?) below, and wherein the negative electrode contains metal lithium and at least one selected from materials capable of lithium ion insertion/desorption: (a) an electrically conductive polymer; (b) a lithium salt formed by substituting a part of a polyanionic acid with lithium; and (?) a molar ratio of a lithium element content in the component (b) to a content of an element involved in a charge/discharge reaction in the component (a) is 0.1 to 1.0. Consequently, the nonaqueous electrolyte secondary battery has an excellent weight energy density and can reduce dependency on electrolyte solution amount.
    Type: Application
    Filed: December 24, 2013
    Publication date: November 5, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroyoshi TAKE, Atsuko MIZUIKE, Aimi MATSUURA, Masao ABE
  • Publication number: 20150303475
    Abstract: In order to achieve a novel power storage device having high-speed charge/discharge and a high capacity density, an electrode which is used in the power storage device, and a porous sheet, the present invention provides a power storage device which includes an electrolyte layer 3, and a positive electrode 2 and a negative electrode 4 that are arranged with the electrolyte layer 3 interposed therebetween, wherein at least one of the positive electrode 2 and the negative electrode 4 contains a self-doping electrically conductive polymer having a carboxylic acid group.
    Type: Application
    Filed: December 19, 2013
    Publication date: October 22, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masao ABE, Hiroyoshi TAKE, Akira OTANI, Yoshihiro UETANI
  • Patent number: 9142817
    Abstract: The present invention relates to a battery separator including: a porous substrate; and a layer of a crosslinked polymer supported on at least one surface of the porous substrate, in which the crosslinked polymer is obtained by reacting (a) a reactive polymer having, in the molecule thereof, a first reactive group containing active hydrogen and a second reactive group having cationic polymerizability with (b) a polycarbonate urethane prepolymer terminated by an isocyanate group.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: September 22, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Shunsuke Noumi, Hiroyoshi Take, Kinkou Sho
  • Patent number: 9142818
    Abstract: The present invention relates to a battery separator including: a porous substrate; and a layer of a crosslinked polymer supported on at least one surface of the porous substrate, in which the crosslinked polymer is obtained by reacting (a) a reactive polymer having, in the molecule thereof, a reactive group containing active hydrogen with (b) a polycarbonate urethane prepolymer terminated by an isocyanate group.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: September 22, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Shunsuke Noumi, Hiroyoshi Take, Kinkou Sho
  • Publication number: 20150235777
    Abstract: A higher performance positive electrode for a power storage device is provided, which ensures a higher capacity density per unit weight of an active substance and, particularly, a higher initial capacity in initial charge/discharge. The power storage device positive electrode includes electrically conductive polymer particles as an active substance, and the electrically conductive polymer particles each have a flat shape.
    Type: Application
    Filed: August 7, 2013
    Publication date: August 20, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yohei Ando, Yutaka Kishii, Masao Abe, Yoshihiro Uetani, Hiroyoshi Take, Atsuko Mizuike
  • Publication number: 20140220438
    Abstract: The invention provides a nonaqueous electrolyte secondary battery having a cathode and an anode arranged so as to be opposite to each other, and an electrolyte layer put therebetween; wherein the cathode comprises: (a) a conductive polymer and (b) at least one selected from the group consisting of a polycarboxylic acid and a metal salt thereof, and wherein the anode comprises a material into which a base metal or ions thereof can be inserted and from which a base metal or ions thereof can be extracted. The invention further provides a cathode sheet for use in the nonaqueous electrolyte secondary battery mentioned above.
    Type: Application
    Filed: June 27, 2012
    Publication date: August 7, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masao Abe, Akira Otani, Yujiro Kawashima, Yoshihiro Uetani, Hiroyoshi Take, Yutaka Kishii, Aimi Matsuura, Yuki Kajisa, Yohei Ando
  • Publication number: 20140186703
    Abstract: Provided is a positive electrode for a power storage device, which has an excellent discharge characteristic irrespective of an oxidized state of polyaniline as a positive active material and which is excellent in storability and handleability. The positive electrode for a power storage device includes polyaniline, where a ratio of a polyaniline oxidized body in the positive electrode is 0.01 to 75% to the entire polyaniline.
    Type: Application
    Filed: December 24, 2013
    Publication date: July 3, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yohei ANDO, Hiroyoshi TAKE, Aimi MATSUURA, Masao ABE, Yoshihiro UETANI
  • Publication number: 20140120424
    Abstract: The present invention provides a nonaqueous electrolyte electricity storage device including a separator that can be produced by a method in which use of a solvent that places a large load on the environment can be avoided and in which control of parameters such as the pore diameter is relatively easy, the nonaqueous electrolyte electricity storage device being capable of trapping ions of metals that tend to form a complex other than lithium. The present invention is a nonaqueous electrolyte electricity storage device including a cathode, an anode, a separator disposed between the cathode and the anode, and an electrolyte having ion conductivity. The cathode and/or the anode is formed of a material containing at least one metal element selected from the group consisting of transition metals, aluminum, tin, and silicon.
    Type: Application
    Filed: June 12, 2012
    Publication date: May 1, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yosuke Yamada, Shunsuke Noimi, Hiroyoshi Take
  • Publication number: 20140115879
    Abstract: Provided is a separator for nonaqueous electrolyte electricity storage devices that includes an improved porous epoxy resin membrane. At least one compound selected from a carboxylic acid, a carboxylic acid salt, a carboxylic acid anhydride, and a carboxylic acid halide, is brought into contact with a porous epoxy resin membrane, and thus hydroxyl groups contained in the porous membrane are reacted with the compound to produce carboxylic acid ester bonds. As a result of this treatment, the amount of active hydroxyl groups present in the porous epoxy resin membrane is reduced, and the porous epoxy resin membrane becomes suitable as a separator for nonaqueous electrolyte electricity storage devices. An epoxy resin sheet yet to be made porous may be subjected to reaction with the compound.
    Type: Application
    Filed: June 12, 2012
    Publication date: May 1, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yosuke Yamada, Yoshihide Kawaguchi, Shunsuke Noumi, Hiroyoshi Take