Patents by Inventor Yuta IKEUCHI

Yuta IKEUCHI 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).

  • Patent number: 11289706
    Abstract: A lithium ion secondary battery includes a positive electrode having a positive electrode active material layer on a current collector, a negative electrode having a negative electrode active material layer on a current collector, and a separator disposed between the positive electrode and the negative electrode and impregnated with a non-aqueous electrolyte solution. The positive electrode active material layer contains a positive electrode active material and a binder, the negative electrode active material layer contains a negative electrode active material and a binder, the binder of the negative electrode active material layer contains a copolymer of vinyl alcohol and an alkali metal neutralized product of ethylenically unsaturated carboxylic acid, and the separator includes a polymeric base material containing an inorganic compound or includes a polymer having a melting point or glass transition temperature of 140° C. or higher.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: March 29, 2022
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Yuta Ikeuchi, Taichi Sakamoto, Takashi Mukai, Masahiro Yanagida, Junichi Fujishige, Masako Kinno, Erina Takahashi
  • Patent number: 11289693
    Abstract: Provided is a lithium-ion battery or lithium-ion capacitor electrode material that can compensate for the drawbacks of a hydrophobic active material, that can impart hydrophilicity to the hydrophobic active material, and that can exhibit excellent dispersibility without deteriorating electrode characteristics. Specifically provided is an electrode material for a lithium-ion battery or a lithium-ion capacitor, the electrode material comprising a composite powder in which a B component is supported or coated on a surface of an A component, the A component comprising a material capable of electrochemically occluding and releasing lithium ions, the B component being sulfur-modified cellulose, and the B component being contained in an amount of 0.01 mass % or more based on 100 mass % of the total amount of the A component and the B component.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: March 29, 2022
    Assignees: DAI-ICHI KOGYO SEIYAKU CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takashi Mukai, Yuta Ikeuchi, Masahiro Yanagida, Yasuteru Saitou, Ayano Sofue, Tetsuya Higashizaki
  • Patent number: 11251418
    Abstract: Provided is a method for manufacturing a slurry for a positive electrode of a nonaqueous electrolyte secondary battery containing an alkali metal complex oxide, the method making it possible to reliably deaerate surplus carbonic acid gas after an alkali component of a slurry containing the alkali metal complex oxide is neutralized within a short period of time. The method for manufacturing a slurry for a positive electrode of a nonaqueous electrolyte secondary battery includes a step of manufacturing an electrode slurry including a step of performing a neutralization treatment on an alkali component in the slurry by using inorganic carbon dissolved in a solvent of the slurry and a step of deaerating the inorganic carbon in the slurry as carbonic acid gas by causing cavitation.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: February 15, 2022
    Assignees: NIHON SPINDLE MANUFACTURING CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Taichi Sakamoto, Takashi Mukai, Yuta Ikeuchi, Naoto Yamashita, Masahiro Yanagida, Keiichi Asami, Keiichiro Onishi
  • Publication number: 20220020989
    Abstract: To provide an electrode for non-aqueous electrolyte batteries, which traps hydrogen sulfide gas, generated from the inside thereof for some reason, in the electrode, and suppresses the outflow of hydrogen sulfide gas to the outside of the battery. An electrode for lithium ion batteries includes a coating material which contains a silanol group and is present on at least a surface of an active material layer. The active material layer contains a sulfur-based material and a resin-based binder. The sulfur-based material is an active material capable of alloying with lithium metal or an active material capable of occluding lithium ions. The coating material containing the silanol group is a silicate having a siloxane bond or a silica fine particle aggregate having a siloxane bond as a component.
    Type: Application
    Filed: November 22, 2019
    Publication date: January 20, 2022
    Applicants: ATTACCATO Limited Liability Company, ADEKA Corporation
    Inventors: Takashi Mukai, Naoto Yamashita, Yuta Ikeuchi, Taichi Sakamoto, Kenji Kakiage, Hiroyuki Osada, Yohei Aoyama
  • Publication number: 20220013783
    Abstract: An object is to provide a non-aqueous electrolyte secondary battery negative electrode that can suppress a deterioration in durability and improve energy density, and a non-aqueous electrolyte secondary battery including the same. A non-aqueous electrolyte secondary battery negative electrode, comprising: a collector formed of a porous metal body, and a negative electrode material disposed in pores of the porous metal body, wherein the negative electrode material comprises a negative electrode active material formed of a silicon-based material, a skeleton-forming agent comprising a silicate having a siloxane bond, a conductivity aid, and a binder.
    Type: Application
    Filed: July 6, 2021
    Publication date: January 13, 2022
    Inventors: Kiyoshi TANAAMI, Makiko TAKAHASHI, Tomohiro KINOSHITA, Shintaro AOYAGI, Yuji ISOGAI, Takashi MUKAI, Yuta IKEUCHI, Taichi SAKAMOTO, Naoto YAMASHITA
  • Publication number: 20210288326
    Abstract: Provided are a lithium ion secondary battery in which heat generation is suppressed when the battery is internally short-circuited by an external impact, such as nail penetration or collapse, or short-circuited by foreign matter contamination or the like; and an electrical appliance using the battery. More specifically, the following lithium ion secondary battery and electrical appliance comprising the lithium ion secondary battery are provided.
    Type: Application
    Filed: October 11, 2017
    Publication date: September 16, 2021
    Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Yuta IKEUCHI, Taichi SAKAMOTO, Takashi MUKAI, Masahiro YANAGIDA, Junichi FUJISHIGE, Masako KINNO, Erina TAKAHASHI
  • Publication number: 20210288325
    Abstract: An object is to provide a non-aqueous electrolyte secondary battery negative electrode which can improve a battery life as compared with a conventional one, a non-aqueous electrolyte secondary battery including it and a method for manufacturing it. A non-aqueous electrolyte secondary battery negative electrode includes: a collector; and a negative electrode layer formed on the collector, the negative electrode layer includes a negative electrode active material, a conductivity aid, a binder and a skeleton-forming agent including a silicate having a siloxane bond or a phosphate having a phosphate bond and the skeleton-forming agent is arranged on at least the interface of the negative electrode layer with the collector.
    Type: Application
    Filed: March 10, 2021
    Publication date: September 16, 2021
    Inventors: Makiko Takahashi, Kiyoshi Tanaami, Tomohiro Kinoshita, Shintaro Aoyagi, Takashi Mukai, Yuta Ikeuchi, Taichi Sakamoto, Naoto Yamashita
  • Publication number: 20210288323
    Abstract: An object is to provide a non-aqueous electrolyte secondary battery negative electrode material which can improve a battery life as compared with a conventional one, a non-aqueous electrolyte secondary battery negative electrode including such a negative electrode material and a non-aqueous electrolyte secondary battery including such a negative electrode. A non-aqueous electrolyte secondary battery negative electrode material that includes a negative electrode active material formed of a silicon-based material a skeleton-forming agent including a silicate having a siloxane bond and an interface layer formed in an interface between the negative electrode active material and the skeleton-forming agent and formed of an inorganic material, a non-aqueous electrolyte secondary battery negative electrode including it and a non-aqueous electrolyte secondary battery are provided.
    Type: Application
    Filed: March 9, 2021
    Publication date: September 16, 2021
    Inventors: Makiko TAKAHASHI, Tomohiro KINOSHITA, Kiyoshi TANAAMI, Shintaro AOYAGI, Takashi MUKAI, Yuta IKEUCHI, Taichi SAKAMOTO, Naoto YAMASHI TA
  • Patent number: 10798807
    Abstract: There is provided a static electricity removal structure in a low-humidity space, in which static electricity can be removed with high efficiency in the low-humidity space by using a static electricity removal device. A low-humidity space is configured such that dehumidified air is supplied from one side of the low-humidity space into the low-humidity space through a blowout surface material in which ventilation pore is formed, and exhausting is performed from the other side of the low-humidity space, which opposes the blowout surface material. A static electricity removal device is disposed on a downstream side of the blowout surface material.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: October 6, 2020
    Assignees: NIHON SPINDLE MANUFACTURING CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Taichi Sakamoto, Takashi Mukai, Yuta Ikeuchi, Masahiro Yanagida, Kenji Izumi, Teppei Taniguchi
  • Publication number: 20200251720
    Abstract: Provided is a lithium-ion battery or lithium-ion capacitor electrode material that can compensate for the drawbacks of a hydrophobic active material, that can impart hydrophilicity to the hydrophobic active material, and that can exhibit excellent dispersibility without deteriorating electrode characteristics. Specifically provided is an electrode material for a lithium-ion battery or a lithium-ion capacitor, the electrode material comprising a composite powder in which a B component is supported or coated on a surface of an A component, the A component comprising a material capable of electrochemically occluding and releasing lithium ions, the B component being sulfur-modified cellulose, and the B component being contained in an amount of 0.01 mass % or more based on 100 mass % of the total amount of the A component and the B component.
    Type: Application
    Filed: July 23, 2018
    Publication date: August 6, 2020
    Applicants: DAI-ICHI KOGYO SEIYAKU CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takashi MUKAI, Yuta IKEUCHI, Masahiro YANAGIDA, Yasuteru SAITOU, Ayano SOFUE, Tetsuya HIGASHIZAKI
  • Publication number: 20200251740
    Abstract: Provided is a nonaqueous binder for electrodes or separators, which is used in a lithium ion battery that has excellent cycle life characteristics at high temperatures. A nonaqueous binder for electrodes or separators of lithium ion batteries, which is obtained by complexing cellulose nanofibers and a thermoplastic fluororesin, and which is characterized in that the cellulose nanofibers have a fiber size (diameter) of from 0.002 ?m to 1 ?m (inclusive), a fiber length of from 0.5 ?m to 10 mm (inclusive), and an aspect ratio ((fiber length of cellulose nanofibers)/(fiber diameter of cellulose nanofibers)) of from 2 to 100,000 (inclusive).
    Type: Application
    Filed: September 29, 2017
    Publication date: August 6, 2020
    Applicants: ATTACCATO LIMITED LIABILITY COMPANY, THE JAPAN STEEL WORKS, LTD.
    Inventors: Takashi MUKAI, Yuta IKEUCHI, Taichi SAKAMOTO, Naoto YAMASHITA, Ryo ISHIGURO, Satoru NAKAMURA
  • Patent number: 10720629
    Abstract: A conventional bipolar battery is constituted of a combination of cells hermetically sealed for preventing a liquid junction and preventing corrosion of a peripheral device due to a liquid leakage. Therefore, electrolytic solution injecting processes are carried out as many as the number of cells, so that much times and costs have been required for manufacturing a large-scale battery. In addition, a wiring space has been required since the cells are connected to one another with wires. The use of a current collector formed of a one-end closed tubular conductor, the current collector having a bottom protruding outward to form a protrusion, eliminates the wiring space and achieves a reduction in ohmic loss due to the wires. In addition, an electrolytic solution in one cell is separated by a water-repellent sheet from an electrolytic solution in another cell, so that a liquid junction is prevented.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: July 21, 2020
    Assignee: EXERGY POWER SYSTEMS, INC.
    Inventors: Kaduo Tsutsumi, Taichi Sakamoto, Takashi Mukai, Yuta Ikeuchi, Naoto Yamashita
  • Publication number: 20190326601
    Abstract: To provide a negative electrode of a lithium ion battery excellent in cycle life characteristics. The negative electrode for a lithium ion battery includes an Si-based material as an active material, wherein a skeleton-forming agent including a silicate having a siloxane bond or a phosphate having an aluminophosphate bond as an ingredient is present on the surface and inside of an active material layer, and the skeleton of the active material is formed with the skeleton-forming agent.
    Type: Application
    Filed: March 25, 2017
    Publication date: October 24, 2019
    Applicants: ATTACCATO Limited Liability Company, ATTACCATO Limited Liability Company
    Inventors: Taichi Sakamoto, Takashi Mukai, Yuta Ikeuchi, Naoto Yamashita, Daichi Iwanari, Kazuma Yoshida, Kazuyoshi Tanaka
  • Publication number: 20190027732
    Abstract: A conventional bipolar battery is constituted of a combination of cells hermetically sealed for preventing a liquid junction and preventing corrosion of a peripheral device due to a liquid leakage. Therefore, electrolytic solution injecting processes are carried out as many as the number of cells, so that much times and costs have been required for manufacturing a large-scale battery. In addition, a wiring space has been required since the cells are connected to one another with wires. The use of a current collector formed of a one-end closed tubular conductor, the current collector having a bottom protruding outward to form a protrusion, eliminates the wiring space and achieves a reduction in ohmic loss due to the wires. In addition, an electrolytic solution in one cell is separated by a water-repellent sheet from an electrolytic solution in another cell, so that a liquid junction is prevented.
    Type: Application
    Filed: February 26, 2016
    Publication date: January 24, 2019
    Applicant: Exergy Power Systems, Inc.
    Inventors: Kaduo Tsutsumi, Taichi Sakamoto, Takashi Mukai, Yuta Ikeuchi, Naoto Yamashita
  • Patent number: 10141573
    Abstract: The teachings herein are directed at a lithium secondary battery negative electrode active material consisting of a Sn Sb based sulfide that delivers a high electrode capacity density, excellent output characteristics, and excellent cycle life characteristics and also provide a method for manufacturing the lithium secondary battery negative electrode active material, said method being capable of easily manufacturing the high performance lithium secondary battery negative electrode active material at low cost without requiring a high-temperature processing step and special facilities as required in a glass melting method. The negative electrode active material preferably is prepared using a method that includes a step of obtaining a Sn Sb based sulfide precipitate by adding an alkali metal sulfide to a mixed solution of a tin halide and an antimony halide.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: November 27, 2018
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, ISUZU GLASS LTD.
    Inventors: Takashi Mukai, Taichi Sakamoto, Yuta Ikeuchi, Tetsuo Sakai, Naoto Yamashita, Koichiro Ikeda, Kiichiro Yamaguchi
  • Publication number: 20180213631
    Abstract: There is provided a static electricity removal structure in a low-humidity space, in which static electricity can be removed with high efficiency in the low-humidity space by using a static electricity removal device. A low-humidity space is configured such that dehumidified air is supplied from one side of the low-humidity space into the low-humidity space through a blowout surface material in which ventilation pore is formed, and exhausting is performed from the other side of the low-humidity space, which opposes the blowout surface material. A static electricity removal device is disposed on a downstream side of the blowout surface material.
    Type: Application
    Filed: March 26, 2018
    Publication date: July 26, 2018
    Inventors: Taichi Sakamoto, Takashi Mukai, Yuta Ikeuchi, Masahiro Yanagida, Keiji Izumi, Teppei Taniguchi
  • Publication number: 20180183047
    Abstract: Provided is a method for manufacturing a slurry for a positive electrode of a nonaqueous electrolyte secondary battery containing an alkali metal complex oxide, the method making it possible to reliably deaerate surplus carbonic acid gas after an alkali component of a slurry containing the alkali metal complex oxide is neutralized within a short period of time. The method for manufacturing a slurry for a positive electrode of a nonaqueous electrolyte secondary battery includes a step of manufacturing an electrode slurry including a step of performing a neutralization treatment on an alkali component in the slurry by using inorganic carbon dissolved in a solvent of the slurry and a step of deaerating the inorganic carbon in the slurry as carbonic acid gas by causing cavitation.
    Type: Application
    Filed: February 20, 2018
    Publication date: June 28, 2018
    Inventors: Taichi Sakamoto, Takashi Mukai, Yuta Ikeuchi, Naoto Yamashita, Masahiro Yanagida, Keiichi Asami, Keiichiro Onishi
  • Patent number: 9812702
    Abstract: To provide a lithium ion secondary battery capable of suppressing thermal run-away when internal short circuiting occurs. The lithium ion secondary battery includes: a positive electrode including a current collector, a positive electrode active material layer that is formed on the current collector and that contains a lithium-containing complex oxide having a layered rock salt structure and being represented by general formula: LiaNibCocMndDeOf (0.2?a?1; b+c+d+e=1; 0?e<1; D is at least one element selected from Li, Fe, Cr, Cu, Zn, Ca, Mg, S, Si, Na, K, and Al; 1.7?f?2.1), and a thermal run-away suppressing layer formed on the positive electrode active material layer and containing a lithium transition metal silicate; and a negative electrode including a negative electrode active material. A ratio of the mass of the lithium-containing complex oxide with respect to the mass of the lithium transition metal silicate in the positive electrode is not lower than 1.5.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: November 7, 2017
    Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Yuta Ikeuchi, Toshikatsu Kojima, Tetsuo Sakai, Tatsuya Eguchi, Hitoshi Aikiyo, Akira Kojima
  • Patent number: 9590237
    Abstract: A lithium-ion secondary battery of the present invention comprises a positive electrode including a positive electrode active material composite formed by compositing a lithium silicate-based material and a carbon material, a negative electrode including a negative electrode active material containing a silicon, and an electrolyte. The lithium-ion secondary battery satisfies 0.8<B/A<1.2, where A is irreversible capacity of the positive electrode and B is irreversible capacity of the negative electrode.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: March 7, 2017
    Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Akira Kojima, Junichi Niwa, Kazuhito Kawasumi, Yuta Ikeuchi, Masanori Morishita, Toshikatsu Kojima, Tetsuo Sakai
  • Patent number: 9583765
    Abstract: Provided are a positive electrode active material for a sodium ion secondary battery, and a positive electrode and a sodium ion secondary battery using the material. The positive electrode active material for a sodium ion secondary battery comprises a lithium sodium-based compound containing lithium (Li), sodium (Na), iron (Fe), and oxygen (O).
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: February 28, 2017
    Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Akira Kojima, Kazuhito Kawasumi, Junichi Niwa, Yuta Ikeuchi, Toshikatsu Kojima, Tetsuo Sakai