Patents by Inventor Koji Hasumi

Koji Hasumi 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: 20220073794
    Abstract: To provide an antistatic laminate and an antistatic adhesive agent capable of maintaining antistatic performance and adhesive force necessary during high-temperature heat treatment, easily removable from an adherend after heat treatment, and capable of reducing or eliminating contaminants such as an antistatic agent and an adhesive agent residue present on an adherend obtained after the removal.
    Type: Application
    Filed: December 20, 2019
    Publication date: March 10, 2022
    Inventors: Shunsuke Suzuki, Jiro Hattori, Koji Hasumi
  • Patent number: 8568928
    Abstract: A non-aqueous electrolyte secondary battery has a positive electrode (1), a negative electrode (2), and a non-aqueous electrolyte. The positive electrode has a positive electrode mixture layer containing a positive electrode active material, a binder agent, and a conductive agent. The positive electrode active material in the positive electrode mixture layer contains an olivine-type lithium-containing metal phosphate represented by the general formula LixMPO4, where M is at least one element selected from the group consisting of Co, Ni, Mn, and Fe, and x is 0<x<1.3. The conductive agent in the positive electrode mixture layer is composed of a mixture of carbon particles and carbon fiber.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: October 29, 2013
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Hironori Shirakata, Koji Hasumi, Hiroyuki Akita, Kazunori Donoue, Yoshinori Kida
  • Patent number: 7635539
    Abstract: As a negative electrode active material, carbon materials such as natural graphite, artificial graphite, non-graphitized carbon, and cork (charcoal) can be used. Further, a negative electrode comprises an active material layer including a group of particulate negative electrode active materials, and nickel is carried on a surface of the active material layer. Examples of a method of carrying nickel on a negative electrode surface include a method by coating, an evaporation method, and a method of bringing nickel ions into existence in a non-aqueous electrolyte to deposit nickel on a negative electrode surface. The amount of nickel added to the non-aqueous electrolyte is not less than 0.0008 mol/1 nor more than 0.007 mol/1.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: December 22, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Hiroyuki Akita, Koji Hasumi, Yoshinori Kida
  • Publication number: 20090068560
    Abstract: A non-aqueous electrolyte secondary battery has a negative electrode, a non-aqueous electrolyte, and a positive electrode containing a positive electrode active material composed of an olivine lithium-containing metal phosphate represented by the general formula LixMPO4, where M is at least one element selected from the group consisting of Co, Ni, Mn, and Fe, and 0<x<1.3. The positive electrode active material contains a LixMPO4 aggregate formed by granulating a LixMPO4 having an average particle size of 1 ?m or less in a volumetric particle size distribution by coating the LixMPO4 with a binding agent composed of a carbonaceous substance. The LixMPO4 aggregate has an average particle size of 3 ?m or less in the volumetric particle size distribution and a 90th percentile particle size (D90) of 7 ?m or greater, as measured at the 90th percentile point of the volumetric particle size distribution.
    Type: Application
    Filed: August 22, 2008
    Publication date: March 12, 2009
    Inventors: Koji Hasumi, Hiroyuki Akita, Hironori Shirakata, Yoshinori Kida, Toshikazu Yoshida, Kazunori Donoue, Takashi Yamamoto, Tetsuyuki Murata, Shigeki Matsuta
  • Publication number: 20090008237
    Abstract: Provided is a method for producing an active material for a lithium secondary battery to enable efficient removal of iron impurities, which would become a problem in production of an active material for a lithium secondary battery, and attain a high quality. The method includes removing iron impurities in an active material for a lithium secondary battery by means of magnetic force. With this method, use of a magnetic force-generating device within a recess portion, which composes at least one part of the recess portion, enables efficient removal of only iron impurities. Thus, it is expected that a voltage drop caused by dissolution of iron compounds, i.e. impurities in a positive electrode, and their migration to a negative electrode in a battery, and decreases in charge and discharge efficiencies and a voltage drop owing to precipitation of lithium can be suppressed.
    Type: Application
    Filed: July 2, 2008
    Publication date: January 8, 2009
    Inventors: Toshikazu Yoshida, Tetsuyuki Murata, Shigeki Matsuta, Yasunobu Iwami, Yoshinori Kida, Hiroyuki Akita, Koji Hasumi
  • Publication number: 20080096098
    Abstract: A non-aqueous electrolyte secondary battery has a positive electrode (1), a negative electrode (2), and a non-aqueous electrolyte. The positive electrode has a positive electrode mixture layer containing a positive electrode active material, a binder agent, and a conductive agent. The positive electrode active material in the positive electrode mixture layer contains an olivine-type lithium-containing metal phosphate represented by the general formula LixMPO4, where M is at least one element selected from the group consisting of Co, Ni, Mn, and Fe, and x is 0<x<1.3. The conductive agent in the positive electrode mixture layer is composed of a mixture of carbon particles and carbon fiber.
    Type: Application
    Filed: October 19, 2007
    Publication date: April 24, 2008
    Inventors: Hironori Shirakata, Koji Hasumi, Hiroyuki Akita, Kazunori Donoue, Yoshinori Kida
  • Publication number: 20070082269
    Abstract: As a negative electrode active material, carbon materials such as natural graphite, artificial graphite, non-graphitized carbon, and cork (charcoal) can be used. Further, a negative electrode comprises an active material layer including a group of particulate negative electrode active materials, and nickel is carried on a surface of the active material layer. Examples of a method of carrying nickel on a negative electrode surface include a method by coating, an evaporation method, and a method of bringing nickel ions into existence in a non-aqueous electrolyte to deposit nickel on a negative electrode surface. The amount of nickel added to the non-aqueous electrolyte is not less than 0.0008 mol/1 nor more than 0.007 mol/1.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 12, 2007
    Inventors: Hiroyuki Akita, Koji Hasumi, Yoshinori Kida
  • Publication number: 20060216605
    Abstract: In a non-aqueous electrolyte secondary battery employing an olivine-type lithium phosphate as a positive electrode active material, power regeneration performance is improved. The non-aqueous electrolyte secondary battery for use as a power source for regenerative charging includes: a positive electrode including a mixture layer containing a positive electrode active material, a binder agent, and a carbon material as a conductive agent; a negative electrode; and a non-aqueous electrolyte. The mixture layer contains, as the positive electrode active material, an olivine-type lithium phosphate represented by the formula LiMPO4, where M is at least one element selected from the group consisting of Co, Ni, Mn, and Fe, and the mixture layer further contains a metal oxide such as a lithium-containing transition metal oxide containing at least Ni or Mn.
    Type: Application
    Filed: March 20, 2006
    Publication date: September 28, 2006
    Inventors: Hironori Shirakata, Hideki Kitao, Hiroyuki Akita, Koji Hasumi, Yoshinori Kida, Toyoki Fujihara, Kazuhisa Takeda, Naoya Nakanishi, Toshiyuki Nohma
  • Publication number: 20060204858
    Abstract: It is an object of the present invention to provide a non-aqueous electrolyte secondary cell that is excellent in high-temperature preservation characteristics and in which an increase in the cell thickness is inhibited. The object is accomplished by the following structure. A non-aqueous electrolyte secondary cell having: a positive electrode; a negative electrode; a non-aqueous electrolyte having a non-aqueous solvent and an electrolytic salt; and an outer casing for housing the positive electrode, the negative electrode, and the non-aqueous electrolyte. The non-aqueous solvent has propylene carbonate at from 10 to 60 volume %. The non-aqueous electrolyte further has, as well as the non-aqueous solvent, vinyl acetate at from 0.3 to 3.0 mass % and vinyl ethylene carbonate at from 1.0 to 3.5 mass %.
    Type: Application
    Filed: March 6, 2006
    Publication date: September 14, 2006
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Koji Hasumi, Kentaro Takahashi, Takao Nishitani, Hiromitsu Suwa