Patents by Inventor Fumiya CHUJO

Fumiya CHUJO 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: 20210367238
    Abstract: Provided is a sulfur-based active material for a non-aqueous electrolyte secondary battery having a large charge/discharge capacity and excellent cycle characteristics which is inexpensively and easily provided, an electrode comprising the sulfur-based active material, and a non-aqueous electrolyte secondary battery comprising the electrode, as well as a producing method thereof. The sulfur-based active material is obtainable by calcinating a raw material, the raw material comprising (1) a heat-expandable particle comprising an outer shell comprising an acryl-based copolymer and a hydrocarbon included inside the outer shell, the heat-expandable particle having an expansion starting temperature of 150° C. or lower, and (2) sulfur.
    Type: Application
    Filed: April 26, 2021
    Publication date: November 25, 2021
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya KUBO, Fumiya CHUJO
  • Publication number: 20210328224
    Abstract: Provided is an organic sulfur material comprising a sulfur-modified acrylic resin, wherein an acrylic resin is at least one polymer selected from the group consisting of (a) a polymer of at least one selected from the group consisting of acrylate compounds represented by CH2?C(R11) COOR12 (wherein, R11 is a hydrogen atom or a methyl group, and R12 is an alkyl group.) and (b) a polymer of at least one selected from the group consisting of acrylate compounds above and at least one selected from the group consisting of diacrylate compounds represented by CH2?C(R21)COO—Y—OCO (R22) C?CH2 (wherein, each of R21 and R22 is the same or different and is a methyl group, etc., Y is a hydrocarbylene group, etc., wherein the hydrocarbylene group may have a substituent selected from a hydroxyl group and an alkyl group.).
    Type: Application
    Filed: April 19, 2021
    Publication date: October 21, 2021
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Fumiya CHUJO, Tatsuya KUBO
  • Publication number: 20210324115
    Abstract: It is an object of the present invention to provide a novel organic sulfur material which is capable of improving a charge/discharge capacity and cycle characteristics, an electrode comprising the organic sulfur material, that is, a positive electrode or a negative electrode, and a lithium-ion secondary battery comprising the electrode. Provided is an organic sulfur material comprising a sulfur-modified acrylic resin, wherein an acrylic resin has peaks around 756 cm?1, around 1066 cm?1, around 1150 cm?1, around 1245 cm?1, around 1270 cm?1, around 1453 cm?1, and around 1732 cm?1 in an FT-IR spectrum.
    Type: Application
    Filed: April 19, 2021
    Publication date: October 21, 2021
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Fumiya CHUJO, Tatsuya KUBO
  • Patent number: 11094939
    Abstract: The present invention provides a sulfur-based active material prepared using an inexpensive polymer material as a starting material and a method of preparing the sulfur-based active material. A non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery provided with an electrode comprising the sulfur-based active material has a large charging and discharging capacity and an excellent cyclability.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: August 17, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya Kubo, Fumiya Chujo
  • Patent number: 11069893
    Abstract: The present invention provides a sulfur-based active material prepared using an inexpensive polymer material as a starting material and a method of preparing the sulfur-based active material. A non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery provided with an electrode comprising the sulfur-based active material has a large charging and discharging capacity and an excellent cyclability.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: July 20, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya Kubo, Fumiya Chujo
  • Publication number: 20200313189
    Abstract: The present invention provides a sulfur-based active material prepared using an inexpensive polymer material as a starting material and a method of preparing the sulfur-based active material. A non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery provided with an electrode comprising the sulfur-based active material has a large charging and discharging capacity and an excellent cyclability.
    Type: Application
    Filed: March 20, 2020
    Publication date: October 1, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya KUBO, Fumiya CHUJO
  • Publication number: 20200313190
    Abstract: The present invention provides a sulfur-based active material prepared using an inexpensive polymer material as a starting material and a method of preparing the sulfur-based active material. A non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery provided with an electrode comprising the sulfur-based active material has a large charging and discharging capacity and an excellent cyclability.
    Type: Application
    Filed: March 20, 2020
    Publication date: October 1, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya KUBO, Fumiya CHUJO
  • Publication number: 20200152979
    Abstract: An object of the present disclosure is to provide a new sulfur-based positive-electrode active material which can improve cyclability of a lithium-ion secondary battery while maintaining a charging and discharging capacity, a positive-electrode comprising the positive-electrode active material, and a lithium-ion secondary battery comprising the positive-electrode. The sulfur-based positive-electrode active material is one comprising doped nitrogen atoms obtainable by heat-treating a starting material comprising a chain organic compound and sulfur under an atmosphere of a nitrogen atom-doping gas.
    Type: Application
    Filed: November 4, 2019
    Publication date: May 14, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya Kubo, Fumiya Chujo, Yasuhisa Minagawa
  • Publication number: 20190148734
    Abstract: An object of the present invention is to provide a lithium-ion secondary battery having a large charge and discharge capacity and excellent cycle characteristics irrespective of kind and shape of a current collector. The lithium-ion secondary battery comprises an electrode comprising a primer layer for protecting a current collector and a crosslinking agent layer comprising a compound being capable of crosslinking an aqueous binder contained in the primer layer, the both layers being disposed between a current collector and an active material layer comprising a sulfur-based active material.
    Type: Application
    Filed: October 11, 2018
    Publication date: May 16, 2019
    Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Naoto YAMASHITA, Takashi MUKAI, Masahiro YANAGIDA, Tatsuya KUBO, Fumiya CHUJO
  • Publication number: 20190148778
    Abstract: An object of the present invention is to provide a method of manufacturing a high capacity lithium ion battery device by safe and simple doping operation. A method of manufacturing a lithium ion battery device comprising a positive electrode and a negative electrode which are laminated with each other, wherein an active material used on the positive electrode is a sulfur-based active material having a total sulfur content of not less than 50% by mass measured by an elementary analysis, the method comprising: a step of forming through-holes penetrating in a thickness direction of the positive electrodes and the negative electrodes, a step of laminating the positive electrodes with the negative electrode and disposing a lithium ion feeding source on at least one side of a laminating direction, and a step of allowing lithium derived from the lithium ion feeding source to be carried on the positive electrode and the negative electrode.
    Type: Application
    Filed: October 11, 2018
    Publication date: May 16, 2019
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya KUBO, Fumiya CHUJO, Akihiro YAMANO, Masanori MORISHITA, Tetsuo SAKAI