Patents by Inventor Kenji Asaoka

Kenji Asaoka 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: 7794881
    Abstract: An electrode for a lithium battery having a thin film composed of active material capable of lithium storage and release, e.g., a microcrystalline or amorphous silicon thin film, provided on a current collector, the electrode being characterized in that a constituent of the current collector is diffused into the thin film.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: September 14, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Shigeki Matsuta, Yoichi Domoto, Yoshio Kato, Hiroshi Nakajima, Hiroaki Ikeda, Kenji Asaoka, Ryuji Ohshita
  • Patent number: 7410728
    Abstract: An electrode for lithium batteries, in which a thin film of active material capable of storage and release of lithium, such as a microcrystalline or amorphous silicon thin film, is provided, through an interlayer, on a current collector, the electrode being characterized in that the interlayer comprises a material alloyable with the thin film of active material.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: August 12, 2008
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Shigeki Matsuta, Yoichi Domoto, Yoshio Kato, Hiroshi Nakajima, Hiroaki Ikeda, Kenji Asaoka, Ryuji Ohshita
  • Patent number: 7241533
    Abstract: An electrode for a rechargeable lithium battery characterized in that thin films of active material capable of lithium storage and release, i.e., microcrystalline or amorphous silicone thin films are deposited on opposite faces of a plate-form current collector.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: July 10, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Hiroaki Ikeda, Masahisa Fujimoto, Shin Fujitani, Kenji Asaoka, Shigeki Matsuta, Yoichi Domoto, Ryuji Ohshita, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Yoshio Kato, Hiroshi Nakajima, Toshikazu Yoshida
  • Patent number: 7235330
    Abstract: An electrode for a lithium battery having a thin film composed of active material capable of lithium storage and release, e.g., a microcrystalline or amorphous silicon thin film, provided on a current collector, the electrode being characterized in that the current collector has a surface roughness Ra of 0.01 ?m or greater.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: June 26, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Shigeki Matsuta, Yoichi Domoto, Yoshio Kato, Hiroshi Nakajima, Hiroaki Ikeda, Kenji Asaoka, Ryuji Ohshita
  • Patent number: 7195842
    Abstract: In an electrode for a lithium battery having a lithium storing and releasing active thin film provided on a current collector, such as a microcrystalline or amorphous silicon thin film, the electrode is characterized in that the thin film is divided into columns by gaps formed therein in a manner to extend in its thickness direction and that the columnar portions are at their bottoms adhered to the current collector.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: March 27, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Shigeki Matsuta, Yoichi Domoto, Yoshio Kato, Hiroshi Nakajima, Hiroaki Ikeda, Kenji Asaoka, Ryuji Ohshita
  • Patent number: 7192673
    Abstract: An electrode for a rechargeable lithium battery which includes a thin film composed of active material that expands and shrinks as it stores and releases lithium, e.g., a microcrystalline or amorphous silicon thin film, deposited on a current collector, characterized in that said current collector exhibits a tensile strength (=tensile strength (N/mm2) per sectional area of the current collector materialĂ—thickness (mm) of the current collector) of not less than 3.82 N/mm.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: March 20, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Hiroaki Ikeda, Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Kenji Asaoka, Shigeki Matsuta, Yoichi Domoto, Ryuji Ohshita, Yoshio Kato, Hiroshi Nakajima, Yasuyuki Kusumoto
  • Publication number: 20030049532
    Abstract: A negative electrode for a lithium battery includes a carbon material capable of occluding and discharging lithium and an additive material having a higher potential to discharge lithium than the carbon material, wherein the additive material is contained in a range of 0.01-9.0 weight % based on the weight of the carbon material, an average particle diameter of the carbon material is in a range of 0.01-50 &mgr;m, and an average particle diameter of the additive material is in a range of 0.01-50 &mgr;m. A lithium battery of the invention includes the negative battery.
    Type: Application
    Filed: June 28, 2002
    Publication date: March 13, 2003
    Inventors: Hiroshi Kurokawa, Kenji Asaoka, Miho Onaka, Taeko Ota, Maruo Kamino