Patents by Inventor Akiyoshi Nakata
Akiyoshi Nakata 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: 10693127Abstract: An alkaline storage battery contains: a positive electrode; a negative electrode containing, as an active material, at least one of a metal capable of forming a dendrite and a metal compound thereof; and an alkaline electrolyte. The alkaline electrolyte contains a compound which is a chain saturated hydrocarbon at least partially having a hydrophilic functional group other than a hydroxyl group and having a molecular weight of 400 or more and less than 220000 in an amount of less than 15 g per 100 mL of the electrolyte.Type: GrantFiled: July 19, 2016Date of Patent: June 23, 2020Assignees: GS Yuasa International Ltd., KYOTO UNIVERSITYInventors: Tadashi Kakeya, Akiyoshi Nakata, Hajime Arai, Zempachi Ogumi
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Patent number: 10476075Abstract: A zinc anode material for secondary cells includes zinc-containing particles that are coated with a coating composition containing at least one oxide of a metal selected from titanium, zirconium, magnesium, tin and yttrium. The surface localization ratio of the coating composition of Equation (1) ranges from 1.6 to 16. In Equation (1), the surface metal atomic ratio of the coating composition is represented by Equation (2), and the bulk metal atomic ratio of the coating composition is represented by Equation (3).Type: GrantFiled: November 1, 2016Date of Patent: November 12, 2019Assignees: Nissan Motor Co., Ltd., National University Corporation, Kyoto UniversityInventors: Masaki Ono, Akiyoshi Nakata, Hajime Arai, Zempachi Ogumi
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Publication number: 20190214636Abstract: A zinc anode material for secondary cells includes zinc-containing particles that are coated with a coating composition containing at least one oxide of a metal selected from titanium, zirconium, magnesium, tin and yttrium. The surface localization ratio of the coating composition of Equation (1) ranges from 1.6 to 16. In Equation (1), the surface metal atomic ratio of the coating composition is represented by Equation (2), and the bulk metal atomic ratio of the coating composition is represented by Equation (3).Type: ApplicationFiled: November 1, 2016Publication date: July 11, 2019Applicants: Nissan Motor Co., Ltd., National University Corporation, Kyoto UniversityInventors: Masaki Ono, Akiyoshi Nakata, Hajime Arai, Zempachi Ogumi
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Patent number: 10044016Abstract: A storage battery includes a negative electrode including, as an active material, at least one of a metal capable of forming a dendrite and a metal compound thereof, a positive electrode, a separator, and an electrolyte containing an additive. In the storage battery, a concentration of the additive in the electrolyte in a region on a side of the negative electrode defined by the separator is higher than a concentration of the additive in a region on a side of the positive electrode.Type: GrantFiled: July 19, 2016Date of Patent: August 7, 2018Assignees: GS Yuasa International Ltd., KYOTO UNIVERSITYInventors: Tadashi Kakeya, Kenichi Saito, Akiyoshi Nakata, Hajime Arai, Zempachi Ogumi
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Patent number: 10033049Abstract: The present invention provides: a non-aqueous electrolyte for an electrochemical device, having ion conductivity sufficient for practical use and capable of improving energy density; a method for producing the same; and an electrochemical device using the same. The non-aqueous electrolyte for an electrochemical device includes a non-aqueous solvent and an alkaline earth metal chloride. The alkaline earth metal chloride is dissolved in an amount of 0.015 mol or more relative to 1 mol of the non-aqueous solvent. The total content of the non-aqueous solvent and the alkaline earth metal chloride is 70 mass % or more in the non-aqueous electrolyte.Type: GrantFiled: March 11, 2013Date of Patent: July 24, 2018Assignee: Panasonic CorporationInventors: Tooru Matsui, Zempachi Ogumi, Toshiro Hirai, Akiyoshi Nakata
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Patent number: 9972875Abstract: An alkaline storage battery includes a positive electrode, a negative electrode containing, as an active material, at least one of a metal capable of forming dendrites and a metal compound thereof, and an alkaline electrolyte solution, wherein a compound having a primary amino group and having no carboxyl group is contained in the alkaline electrolyte solution in an amount greater than or equal to 7% by volume.Type: GrantFiled: December 1, 2015Date of Patent: May 15, 2018Assignees: GS Yuasa International Ltd., KYORO UNIVERSITYInventors: Tadashi Kakeya, Akiyoshi Nakata, Toshiro Hirai, Hajime Arai, Junichi Yamaki, Zempachi Ogumi
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Patent number: 9812264Abstract: Disclosed is a high-capacity electrochemical energy storage device in which a conversion reaction proceeds as the oxidation-reduction reaction, and the separation (hysteresis) between the electrode potentials for oxidation and reduction is small. The electrochemical energy storage device includes a first electrode including a first active material, a second electrode including a second active material, and a non-aqueous electrolyte interposed between the first and second electrodes. At least one of the first and second active materials is a metal salt having a polyatomic anion and a metal ion, and the metal salt is capable of oxidation-reduction reaction involving reversible release and acceptance of the polyatomic anion.Type: GrantFiled: March 11, 2013Date of Patent: November 7, 2017Assignee: PANASONIC CORPORATIONInventors: Tooru Matsui, Zempachi Ogumi, Toshiro Hirai, Akiyoshi Nakata
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Patent number: 9742035Abstract: An exemplary electrochemical energy storage device includes: a positive electrode including a positive electrode active material; a negative electrode including a negative electrode active material; and a non-aqueous electrolytic solution. The non-aqueous electrolytic solution includes an electrolyte salt represented by Li(XSO2NSO2Y) (where X and Y are any of F, CnF2n+1 and (CF2)m, and (CF2)m forms a cyclic imide anion), an organic solvent which is capable of dissolving the electrolyte salt, and a polyethylene glycol of which both terminals are not OH. The positive electrode active material includes a chloride of Cu, Bi or Ag, and the negative electrode active material includes lithium.Type: GrantFiled: February 8, 2016Date of Patent: August 22, 2017Assignees: PANASONIC CORPORATION, KYOTO UNIVERSITYInventors: Toru Matsui, Akiyoshi Nakata, Toshiro Hirai, Jun-ichi Yamaki, Zempachi Ogumi
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Publication number: 20170033345Abstract: A storage battery includes a negative electrode including, as an active material, at least one of a metal capable of forming a dendrite and a metal compound thereof, a positive electrode, a separator, and an electrolyte containing an additive. In the storage battery, a concentration of the additive in the electrolyte in a region on a side of the negative electrode defined by the separator is higher than a concentration of the additive in a region on a side of the positive electrode.Type: ApplicationFiled: July 19, 2016Publication date: February 2, 2017Inventors: Tadashi KAKEYA, Kenichi SAITO, Akiyoshi NAKATA, Hajime ARAI, Zempachi OGUMI
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Publication number: 20170033351Abstract: An alkaline storage battery contains: a positive electrode; a negative electrode containing, as an active material, at least one of a metal capable of forming a dendrite and a metal compound thereof; and an alkaline electrolyte. The alkaline electrolyte contains a compound which is a chain saturated hydrocarbon at least partially having a hydrophilic functional group other than a hydroxyl group and having a molecular weight of 400 or more and less than 220000 in an amount of less than 15 g per 100 mL of the electrolyte.Type: ApplicationFiled: July 19, 2016Publication date: February 2, 2017Inventors: Tadashi KAKEYA, Akiyoshi NAKATA, Hajime ARAI, Zempachi OGUMI
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Publication number: 20160285128Abstract: An exemplary electrochemical energy storage device includes: a positive electrode including a positive electrode active material; a negative electrode including a negative electrode active material; and a non-aqueous electrolytic solution. The non-aqueous electrolytic solution includes an electrolyte salt represented by Li(XSO2NSO2Y) (where X and Y are any of F, CnF2n+1 and (CF2)m, and (CF2)m forms a cyclic imide anion), an organic solvent which is capable of dissolving the electrolyte salt, and a polyethylene glycol of which both terminals are not OH. The positive electrode active material includes a chloride of Cu, Bi or Ag, and the negative electrode active material includes lithium.Type: ApplicationFiled: February 8, 2016Publication date: September 29, 2016Inventors: Toru MATSUI, Akiyoshi NAKATA, Toshiro HIRAI, Jun-ichi YAMAKI, Zempachi OGUMI
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Publication number: 20160164151Abstract: An alkaline storage battery includes a positive electrode, a negative electrode containing, as an active material, at least one of a metal capable of forming dendrites and a metal compound thereof, and an alkaline electrolyte solution, wherein a compound having a primary amino group and having no carboxyl group is contained in the alkaline electrolyte solution in an amount greater than or equal to 7% by volume.Type: ApplicationFiled: December 1, 2015Publication date: June 9, 2016Inventors: Tadashi KAKEYA, Akiyoshi NAKATA, Toshiro HIRAI, Hajime ARAI, Junichi YAMAKI, Zempachi OGUMI
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Publication number: 20150214549Abstract: The present invention is to provide an electrode cell which is, when used in a battery, able to improve cycle characteristics of the battery, and a battery including the electrode cell. Presented is an electrode cell including at least an electrode active material layer and an electrolyte layer, wherein the electrode active material layer contains at least one electrode active material selected from the group of: vanadium(III) chloride, lead(II) chloride, tungsten(II) chloride, nickel(II) chloride, vanadium, lead, tungsten and nickel, and wherein the electrolyte layer contains an electrolyte containing aluminum(III) chloride and an ionic liquid that contains a chloride ion and organic onium cation.Type: ApplicationFiled: July 29, 2013Publication date: July 30, 2015Inventors: Koji Suto, Katsunori Nakaya, Zempachi Ogumi, Toshiro Hirai, Akiyoshi Nakata
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Publication number: 20140242474Abstract: Disclosed is a high-capacity electrochemical energy storage device in which a conversion reaction proceeds as the oxidation-reduction reaction, and the separation (hysteresis) between the electrode potentials for oxidation and reduction is small. The electrochemical energy storage device includes a first electrode including a first active material, a second electrode including a second active material, and a non-aqueous electrolyte interposed between the first and second electrodes. At least one of the first and second active materials is a metal salt having a polyatomic anion and a metal ion, and the metal salt is capable of oxidation-reduction reaction involving reversible release and acceptance of the polyatomic anion.Type: ApplicationFiled: March 11, 2013Publication date: August 28, 2014Applicant: PANASONIC CORPORATIONInventors: Tooru Matsui, Zempachi Ogumi, Toshiro Hirai, Akiyoshi Nakata
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Publication number: 20140170507Abstract: The present invention provides: a non-aqueous electrolyte for an electrochemical device, having ion conductivity sufficient for practical use and capable of improving energy density; a method for producing the same; and an electrochemical device using the same. The non-aqueous electrolyte for an electrochemical device includes a non-aqueous solvent and an alkaline earth metal chloride. The alkaline earth metal chloride is dissolved in an amount of 0.015 mol or more relative to 1 mol of the non-aqueous solvent. The total content of the non-aqueous solvent and the alkaline earth metal chloride is 70 mass % or more in the non-aqueous electrolyte.Type: ApplicationFiled: March 11, 2013Publication date: June 19, 2014Applicant: PANASONIC CORPORATIONInventors: Tooru Matsui, Zempachi Ogumi, Toshiro Hirai, Akiyoshi Nakata