Patents by Inventor Sohei Saito

Sohei Saito 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: 20150125757
    Abstract: A current collector, an electrode structure, a non-aqueous electrolyte battery, and an electrical storage device capable of providing superior shut down function are provided. According to the present invention, a current collector having a resin layer on at least one side of a conductive substrate, wherein: the resin layer has a thermoplastic resin dispersed in a thermosetting resin base material, the thermoplastic resin encapsuling a conductive agent; a value given by (average thickness of the conductive agent)/(average thickness of the thermoplastic resin) is 0.5 to 3; the conductive agent is formulated so that a value of volume % given by (conductive agent)/(conductive agent+thermoplastic resin) is 10 to 50%; and formulation ratio of the thermoplastic resin is 10 to 65%, is provided.
    Type: Application
    Filed: May 10, 2013
    Publication date: May 7, 2015
    Applicants: UACJ CORPORATION, UACJ FOIL CORPORATION
    Inventors: Osamu Kato, Sohei Saito, Yukiou Honkawa, Mitsuyuki Wasamoto, Tsugio Kataoka, Satoshi Yamabe
  • Publication number: 20150118553
    Abstract: Current collector, an electrode structure, a non-aqueous electrolyte battery, and an electrical storage device having superior shut down function are provided. According to the present invention, a current collector having a resin layer on at least one side of a conductive substrate is provided. Here, thermoplastic resin particles substantially free of a conductive agent are dispersed in a thermosetting resin base material containing the conductive agent to structure the resin layer; a value of mass ratio given by (thermoplastic resin particles)/(conductive agent) is 0.3 to 1.5; and a value given by (average thickness of conductive agent)/(average thickness of thermoplastic resin particles) is 0.3 to 4.0.
    Type: Application
    Filed: May 10, 2013
    Publication date: April 30, 2015
    Inventors: Osamu Kato, Sohei Saito, Yukiou Honkawa, Mitsuyuki Wasamoto, Tsugio Kataoka, Satoshi Yamabe
  • Publication number: 20150064569
    Abstract: A current collector, an electrode structure, a non-aqueous electrolyte battery, and an electrical storage device capable of achieving superior shut down function, are provided. According to the present invention, a current collector 1 having a resin layer 5 on at least one side of a conductive substrate 3, the resin layer 5 including a fluorine-based resin and conductive particles 11, and having a thickness of 0.3 to 20 ?m, the current collector satisfying at least one of the following characteristics of (1) to (3): (1) average particle diameter of the conductive particles is 0.5 to 25 ?m, and a surface occupying ratio of the conductive particles at the surface of the resin layer is 10 to 50%, (2) resistance of the surface of the resin layer at 20° C. is 1.0 to 10?, and resistance after heating at 220° C. is 200 to 600?, and (3) resistance of the surface of the resin layer at 20° C. is 1.8 to 9.7?, and resistance after heating at 180° C. is 209 to 532?, is provided.
    Type: Application
    Filed: April 2, 2013
    Publication date: March 5, 2015
    Applicants: UACJ CORPORATION, UACJ Foil Corporation
    Inventors: Osamu Kato, Sohei Saito, Yukiou Honkawa, Mitsuyuki Wasamoto, Tsugio Kataoka, Satoshi Yamabe
  • Publication number: 20150050559
    Abstract: The present invention relates to current collectors, electrode structures, non-aqueous electrolyte batteries, and electrical storage devices (electrical double layer capacitors, lithium ion capacitors, and the like) that are capable to realize superior battery characteristics by suitably forming an active material layer by using an aqueous solvent. A current collector having a resin layer on at least one side of a conductive substrate, the resin layer being formed by a composition for current collector including an acryl-based resin containing acrylic acid ester and acryl amide or derivatives thereof as a main component; melamine or derivatives thereof; and carbon particles, is provided.
    Type: Application
    Filed: April 12, 2013
    Publication date: February 19, 2015
    Applicants: UACJ Corporation, UACJ Foil Corporation
    Inventors: Osamu Kato, Sohei Saito, Yukiou Honkawa, Mitsuyuki Wasamoto, Tsugio Kataoka, Satoshi Yamabe
  • Publication number: 20140315095
    Abstract: A current collector with improved electrochemical stability having a conductive resin layer formed thereon is provided. The current collector 3 of the present embodiment is structured by forming a conductive resin layer 1 on at least one side of a conductive substrate 2. Here, the conductive resin layer 1 contains an acryl-based resin or a soluble nitrocellulose-based resin, and a conductive material. The current collector 3 has a maximum current response of 10 ?A/cm2 or lower, when the current response is measured under conditions that the current collector is placed in a nonaqueous electrolyte solution at an electrode potential of +3V to +4.5V versus a lithium reference electrode.
    Type: Application
    Filed: July 27, 2012
    Publication date: October 23, 2014
    Applicants: UACJ FOIL CORPORATION, UACJ CORPORATION
    Inventors: Yukiou Honkawa, Osamu Kato, Sohei Saito, Mitsuyuki Wasamoto, Tsugio Kataoka
  • Publication number: 20140315094
    Abstract: A current collector which is suitable for discharging and charging at a large current density is provided. The present invention provides a current collector including a conductive substrate and a conductive resin layer provided on one side or both sides of the conductive substrate. The conductive resin layer contains a soluble nitrocellulose-based resin and a conductive material.
    Type: Application
    Filed: July 29, 2011
    Publication date: October 23, 2014
    Applicants: UACJ FOIL CORPORATION, UACJ CORPORATION
    Inventors: Osamu Kato, Sohei Saito, Yukiou Honkawa, Mitsuyuki Wasamoto, Kenichi Kadowaki, Tsugio Kataoka
  • Publication number: 20140255788
    Abstract: An object of the present invention is to provide a current collector which includes an aluminum alloy foil for electrode current collector, with high electrical conductivity and high strength after a drying process performed after application of an active material. According to the present invention, provided is a current collector including a conductive substrate and a resin layer provided on one side or both sides of the conductive substrate, wherein: the conductive substrate is an aluminum alloy foil containing 0.03 to 1.0 mass % (hereinafter mass % is referred to as %) of Fe, 0.01 to 0.3% of Si, 0.0001 to 0.2% of Cu, with the rest being Al and unavoidable impurities, an aluminum alloy foil after a final cold rolling having a tensile strength of 180 MPa or higher, a 0.2% yield strength of 160 MPa or higher, and an electrical conductivity of 58% IACS or higher; an aluminum alloy foil after performing a heat treatment at 120° C. for 24 hours, at 140° C. for 3 hours, or at 160° C.
    Type: Application
    Filed: July 29, 2011
    Publication date: September 11, 2014
    Applicants: UACJ FOIL CORPORATION, UACJ CORPORATION
    Inventors: Masakuzu Seki, Osamu Kato, Sohei Saito, Yukiou Honkawa, Satoshi Suzuki, Koichi Ashizawa, Mitsuyuki Wasamoto, Kenichi Kadowaki, Kenji Yamamoto
  • Publication number: 20140178766
    Abstract: Provided is a technique to confirm the performance of the conductive resin layer of a current collector without actually preparing an electrode structure, a non-aqueous electrolyte battery, an electrical double layer capacitor, a lithium ion capacitor, or an electrical storage device, and to confirm the performance of the conductive resin layer easily with high accuracy by a non-destructive test. A current collector includes a conductive substrate and a resin layer possessing conductivity, the resin layer being formed on at least one side of the conductive substrate. The resin layer possessing conductivity contains a resin and a conductive material containing carbon as a main component. When the color tone of the surface of the resin layer possessing conductivity is specified with L*a*b* color system, L* is 60 or lower, a* is ?1.0 to 1.0, and b* is ?1.0 to 3.0.
    Type: Application
    Filed: July 27, 2012
    Publication date: June 26, 2014
    Applicants: UACJ FOIL CORPORATION, UACJ CORPORATION
    Inventors: Osamu Kato, Sohei Saito, Yukiou Honkawa, Mitsuyuki Wasamoto, Kenichi Kadowaki, Satoshi Yamabe
  • Publication number: 20140170488
    Abstract: An object of the present invention is to provide a current collector which can decrease the internal resistance of a non-aqueous electrolyte battery, be used suitably for a non-aqueous electrolyte battery such as a lithium ion secondary battery and the like or for an electrical storage device such as a lithium ion capacitor and the like, and improve high rate characteristics. According to the present invention, a current collector which is structured by forming a resin layer possessing conductivity on at least one side of a conductive substrate is provided. The resin layer contains a chitosan-based resin and a conductive material, and the water contact angle of the surface of the resin layer measured by ?/2 method in a thermostatic chamber at 23° C. is 5 degrees or more and 60 degrees or less. In addition, an electrode structure, a non-aqueous electrolyte battery, and an electrical storage device which use the current collector are provided.
    Type: Application
    Filed: July 27, 2012
    Publication date: June 19, 2014
    Applicants: UACJ FOIL CORPORATION, UACJ CORPORATION
    Inventors: Osamu Kato, Sohei Saito, Yukiou Honkawa, Mitsuyuki Wasamoto, Kenichi Kadowaki, Satoshi Yamabe
  • Publication number: 20140162122
    Abstract: An object of the present invention is to improve an adhesion between the surface of a conductive resin layer and an active material, which are provided to a current collector. Another object of the present invention is to improve a high rate characteristics or electrode lifetime of a non-aqueous electrolyte battery, an electrical double layer capacitor, a lithium ion capacitor and the like which uses the current collector. A current collector prepared by forming a resin layer possessing conductivity on a conductive substrate, is provided. A surface roughness Ra of the resin layer possessing conductivity is 0.1 ?m or higher and 1.0 ?m or lower. In addition, when a coating thickness of the resin layer possessing conductivity is taken as t [?m] and the average angle of inclination of the resin layer surface is taken as ?a [degree], (?)t+0.5??a?(?)t+10 is met.
    Type: Application
    Filed: July 27, 2012
    Publication date: June 12, 2014
    Applicants: UACJ FOIL CORPORATION, UACJ CORPORATION
    Inventors: Osamu Kato, Sohei Saito, Yukiou Honkawa, Mitsuyuki Wasamoto, Kenichi Kadowaki, Satoshi Yamabe