Patents by Inventor Kenichi Kawakita

Kenichi Kawakita 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: 10727476
    Abstract: The present invention aims to provide an electrode for lithium ion batteries which exhibits excellent electrical conductivity even if its thickness is large. The electrode for lithium ion batteries of the present invention includes a first main surface to be located adjacent to a separator of a lithium ion battery and a second main surface to be located adjacent to a current collector of the lithium ion battery. The electrode has a thickness of 150 to 5000 ?m. The electrode contains, between the first main surface and the second main surface, a conductive member (A) made of an electronically conductive material and a large number of active material particles (B). At least part of the conductive member (A) forms a conductive path that electrically connects the first main surface to the second main surface. The conductive path is in contact with the active material particles (B) around the conductive path.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: July 28, 2020
    Assignees: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Yusuke Mizuno, Yasuhiro Shindo, Yasuhiro Tsudo, Kenichi Kawakita, Yuki Kusachi, Yasuhiko Ohsawa, Hajime Satou, Hiroshi Akama, Hideaki Horie
  • Publication number: 20200136125
    Abstract: The present invention provides a method of producing an electrode active material molded body for a lithium-ion battery suitable for the production of a lithium-ion battery, and a method of producing a lithium-ion battery using the electrode active material molded body, wherein the methods can reduce the time, work, equipment, and the like required for the production. The present invention provides a method of producing an electrode composition molded body for a lithium-ion battery, including: a molding step of molding a composition containing an electrode active material for a lithium-ion battery and an electrolyte solution into an electrode active material molded body for a lithium-ion battery as an unbound product of the electrode active material for a lithium-ion battery, wherein the composition has an electrolyte solution content of 0.1 to 40 wt % based on the weight of the composition.
    Type: Application
    Filed: April 20, 2018
    Publication date: April 30, 2020
    Applicants: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Takuya SUENAGA, Kenichi KAWAKITA, Yuki KUSACHI, Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Patent number: 10511004
    Abstract: A non-aqueous electrolyte secondary battery has a positive electrode having a positive electrode active material layer, a negative electrode having a negative electrode active material layer, and an electrolyte layer having an electrolyte solution containing a non-aqueous solvent. At least one of the positive electrode active material layer and the negative electrode active material layer contains an electrode material for a non-aqueous electrolyte secondary battery having a core part including an electrode active material and a shell part including a conductive material in a base material formed by a gel-forming polymer having a liquid absorption rate with respect to the electrolyte solution of 10 to 200%.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: December 17, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yuki Kusachi, Yasuhiko Ohsawa, Hiroshi Akama, Hideaki Horie, Yuta Murakami, Kenichi Kawakita, Yusuke Mizuno, Yasuhiro Tsudo, Yasuhiro Shindo
  • Publication number: 20190348712
    Abstract: To provide a structure which allows production of an electrode, even if the film thickness of an electrode is increased; and a non-aqueous electrolyte secondary battery using the same.
    Type: Application
    Filed: July 25, 2019
    Publication date: November 14, 2019
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko OHSAWA, Yuki KUSACHI, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Kenichi KAWAKITA, Yasuhiro Shindo, Yasuhiro TSUDO
  • Patent number: 10431851
    Abstract: To provide a structure which allows production of an electrode, even if the film thickness of an electrode is increased; and a non-aqueous electrolyte secondary battery using the same.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: October 1, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko Ohsawa, Yuki Kusachi, Hiroshi Akama, Hideaki Horie, Yusuke Mizuno, Kenichi Kawakita, Yasuhiro Shindo, Yasuhiro Tsudo
  • Patent number: 10276858
    Abstract: The present invention aims to provide an electrode for lithium ion batteries which exhibits excellent electrical conductivity even if its thickness is large. The electrode for lithium ion batteries of the present invention includes a first main surface to be located adjacent to a separator of a lithium ion battery and a second main surface to be located adjacent to a current collector of the lithium ion battery. The electrode has a thickness of 150 to 5000 ?m. The electrode contains, between the first main surface and the second main surface, a conductive member (A) made of an electronically conductive material and a large number of active material particles (B). At least part of the conductive member (A) forms a conductive path that electrically connects the first main surface to the second main surface. The conductive path is in contact with the active material particles (B) around the conductive path.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: April 30, 2019
    Assignees: SANYO CHEMICAL LTD., NISSAN MOTOR CO., LTD.
    Inventors: Yusuke Mizuno, Yasuhiro Shindo, Yasuhiro Tsudo, Kenichi Kawakita, Yuki Kusachi, Yasuhiko Ohsawa, Hajime Satou, Hiroshi Akama, Hideaki Horie
  • Patent number: 10236478
    Abstract: Provided is a method for producing a lithium ion cell having an outer container composed of a resin molded article, and the method for producing a lithium ion cell includes a current collector forming process of forming, on the inner side of an outer container, each of a first electrode current collector and a second electrode current collector composed of an electrically conductive polymer composition by using a molding die.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: March 19, 2019
    Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yasuhiro Shindo, Yusuke Mizuno, Kenichi Kawakita, Yasuhiko Ohsawa, Yuki Kusachi, Hajime Satou, Hiroshi Akama, Hideaki Horie
  • Patent number: 10211462
    Abstract: Provided is a lithium ion cell having a power generation part provided with a single cell obtained by stacking a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode current collector in the order, and an exterior cell container for accommodating the power generation part, in which the positive electrode active material layer is a non-bound material of a positive electrode active material particle, the negative electrode active material layer is a non-bound material of a negative electrode active material particle, and the single cell has flexibility.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: February 19, 2019
    Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yasuhiro Shindo, Yusuke Mizuno, Kenichi Kawakita, Yasuhiko Ohsawa, Yuki Kusachi, Hajime Satou, Hiroshi Akama, Hideaki Horie
  • Publication number: 20190020032
    Abstract: An object of the present invention is to provide a resin for coating an active material for lithium ion batteries which can prevent expansion of the electrode without inhibiting conduction of lithium ions. The resin for coating an active material for lithium ion batteries according to the present invention has a liquid absorbing rate of 10% or more when the resin is immersed in an electrolyte solution, and a tensile elongation at break of 10% or more when the resin is saturated with the electrolyte solution.
    Type: Application
    Filed: September 20, 2018
    Publication date: January 17, 2019
    Applicants: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yasuhiro TSUDO, Kenichi KAWAKITA, Yuta MURAKAMI, Yuki KUSACHI, Yasuhiko OHSAWA, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20180301691
    Abstract: The present invention aims to provide an electrode for lithium ion batteries which exhibits excellent electrical conductivity even if its thickness is large. The electrode for lithium ion batteries of the present invention includes a first main surface to be located adjacent to a separator of a lithium ion battery and a second main surface to be located adjacent to a current collector of the lithium ion battery. The electrode has a thickness of 150 to 5000 ?m. The electrode contains, between the first main surface and the second main surface, a conductive member (A) made of an electronically conductive material and a large number of active material particles (B). At least part of the conductive member (A) forms a conductive path that electrically connects the first main surface to the second main surface. The conductive path is in contact with the active material particles (B) around the conductive path.
    Type: Application
    Filed: April 12, 2018
    Publication date: October 18, 2018
    Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yasuhiro TSUDO, Kenichi KAWAKITA, Yuki KUSACHI, Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Patent number: 9941512
    Abstract: A core-shell-type electrode material is used as an electrode active material layer of a non-aqueous electrolyte secondary battery, the core-shell-type electrode material having a core part including an electrode active material and a shell part in which a conductive material is contained in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: April 10, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yasuhiko Ohsawa, Hideaki Horie, Hiroshi Akama, Yuki Kusachi, Yuta Murakami, Kenichi Kawakita, Yusuke Mizuno, Yasuhiro Tsudo, Yasuhiro Shindo
  • Patent number: 9941511
    Abstract: A core-shell-type electrode material is used as an electrode active material layer of a non-aqueous electrolyte secondary battery, the core-shell-type electrode material having a core part in which at least a part of a surface of an electrode active material is coated with a first conductive material and a shell part in which a second conductive material is contained in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: April 10, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yasuhiko Ohsawa, Hideaki Horie, Hiroshi Akama, Yuki Kusachi, Yuta Murakami, Kenichi Kawakita, Yusuke Mizuno, Yasuhiro Tsudo, Yasuhiro Shindo
  • Publication number: 20180090762
    Abstract: The objective of the present invention is to provide an electrode for a lithium ion battery which has excellent electron conductivity even when the thickness of the electrode is increased. The electrode for a lithium ion battery according to the present invention includes a first principal surface located on a separator side of the lithium ion battery, and a second principal surface located on a current collector side, wherein the electrode has a thickness of 50 to 5000 ?m, and the electrode includes, between the first principal surface and the second principal surface, short fibers (A) having an average fiber length of 50 nm or more and less than 100 ?m, long fibers (B) having an average fiber length of 100 ?m or more and 1000 ?m or less, and active material particles (C), and the short fibers (A) and the long fibers (B) are electroconductive fibers.
    Type: Application
    Filed: March 3, 2016
    Publication date: March 29, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yusuke NAKASHIMA, Kenichi KAWAKITA, Yuki KUSACHI, Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20180048023
    Abstract: To provide a structure which allows production of an electrode, even if the film thickness of an electrode is increased; and a non-aqueous electrolyte secondary battery using the same.
    Type: Application
    Filed: December 25, 2015
    Publication date: February 15, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasuhiko OHSAWA, Yuki KUSACHI, Hiroshi AKAMA, Hideaki HORIE, Yusuke MIZUNO, Kenichi KAWAKITA, Yasuhiro SHINDO, Yasuhiro TSUDO
  • Publication number: 20170237046
    Abstract: Provided is a method for producing a lithium ion cell having an outer container composed of a resin molded article, and the method for producing a lithium ion cell includes a current collector forming process of forming, on the inner side of an outer container, each of a first electrode current collector and a second electrode current collector composed of an electrically conductive polymer composition by using a molding die.
    Type: Application
    Filed: February 7, 2017
    Publication date: August 17, 2017
    Applicant: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yasuhiro SHINDO, Yusuke MIZUNO, Kenichi KAWAKITA, Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20170237116
    Abstract: Provided is a lithium ion cell having a power generation part provided with a single cell obtained by stacking a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode current collector in the order, and an exterior cell container for accommodating the power generation part, in which the positive electrode active material layer is a non-bound material of a positive electrode active material particle, the negative electrode active material layer is a non-bound material of a negative electrode active material particle, and the single cell has flexibility.
    Type: Application
    Filed: February 7, 2017
    Publication date: August 17, 2017
    Applicant: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yasuhiro SHINDO, Yusuke MIZUNO, Kenichi KAWAKITA, Yasuhiko OHSAWA, Yuki KUSACHI, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20170033350
    Abstract: The present invention aims to provide an electrode for lithium ion batteries which exhibits excellent electrical conductivity even if its thickness is large. The electrode for lithium ion batteries of the present invention includes a first main surface to be located adjacent to a separator of a lithium ion battery and a second main surface to be located adjacent to a current collector of the lithium ion battery. The electrode has a thickness of 150 to 5000 ?m. The electrode contains, between the first main surface and the second main surface, a conductive member (A) made of an electronically conductive material and a large number of active material particles (B). At least part of the conductive member (A) forms a conductive path that electrically connects the first main surface to the second main surface. The conductive path is in contact with the active material particles (B) around the conductive path.
    Type: Application
    Filed: December 12, 2014
    Publication date: February 2, 2017
    Applicants: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Yusuke MIZUNO, Yasuhiro SHINDO, Yasuhiro TSUDO, Kenichi KAWAKITA, Yuki KUSACHI, Yasuhiko OHSAWA, Hajime SATOU, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20170012283
    Abstract: An object of the present invention is to provide a negative electrode active material capable of reducing the irreversible capacity of a lithium ion battery. The present invention provides a coated negative electrode active material for lithium ion batteries wherein at least a portion of the surface of a particulate negative electrode active material for lithium ion batteries is coated with a coating agent and the coated negative electrode active material is doped with at least one of lithium and lithium ions.
    Type: Application
    Filed: February 16, 2015
    Publication date: January 12, 2017
    Applicants: SANYO CHEMICAL INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Yusuke MIZUNO, Takahiro IMAISHI, Kenichi KAWAKITA, Yuki KUSACHI, Hiroshi AKAMA, Hideaki HORIE
  • Publication number: 20160351877
    Abstract: A non-aqueous electrolyte secondary battery has a positive electrode having a positive electrode active material layer, a negative electrode having a negative electrode active material layer, and an electrolyte layer having an electrolyte solution containing a non-aqueous solvent. At least one of the positive electrode active material layer and the negative electrode active material layer contains an electrode material for a non-aqueous electrolyte secondary battery having a core part including an electrode active material and a shell part including a conductive material in a base material formed by a gel-forming polymer having a liquid absorption rate with respect to the electrolyte solution of 10 to 200%.
    Type: Application
    Filed: January 26, 2015
    Publication date: December 1, 2016
    Inventors: Yuki Kusachi, Yasuhiko Ohsawa, Hiroshi Akama, Hideaki Horie, Yuta Murakami, Kenichi Kawakita, Yusuke Mizuno, Yasuhiro Tsudo, Yasuhiro Shindo
  • Publication number: 20160260966
    Abstract: A core-shell-type electrode material is used as an electrode active material layer of a non-aqueous electrolyte secondary battery, the core-shell-type electrode material having a core part in which at least a part of a surface of an electrode active material is coated with a first conductive material and a shell part in which a second conductive material is contained in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state.
    Type: Application
    Filed: October 3, 2014
    Publication date: September 8, 2016
    Inventors: Yasuhiko Ohsawa, Hideaki Horie, Hiroshi Akama, Yuki Kusachi, Yuta Murakami, Kenichi Kawakita, Yusuke Mizuno, Yasuhiro Tsudo, Yasuhiro Shindo