Patents by Inventor Takuya Mihara

Takuya Mihara 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).

  • Positive electrode material and cell for nonaqueous electrolyte secondary battery
    Patent number: 6613478
    Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-deficient manganese layered composite oxide represented by the general formula Li1-xMnO2-&dgr;. A lithium deficiency quantity x is in the range of 0.03<x≦0.5. An oxygen nonstoichiometry quantity &dgr; is equal to or smaller than 0.2.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: September 2, 2003
    Assignees: Nissan Motor Co., Ltd., Seimi Chemical Co., Ltd.
    Inventors: Fumio Munakata, Tatsuhiro Fukuzawa, Yasuhiko Ohsawa, Yuuji Tanjo, Takuya Mihara, Takashi Kimura, Kazuo Sunahara, Manabu Suhara
  • Positive electrode material and battery for nonaquous electrolyte secondary battery
    Publication number: 20020012843
    Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the formula Li1−xAxMnO2, or the formula Li1−xAxMn1−yMyO2. The lithium-containing manganese composite oxide includes a lithium substitute metal A, such as Na, K, Ag, substituting for part of Li. The lithium substitution quantity x may be in the range of 0.03<x≦0.2.
    Type: Application
    Filed: February 26, 2001
    Publication date: January 31, 2002
    Applicant: NISSAN MOTOR CO., LTD. and
    Inventors: Fumio Munakata, Tatsuhiro Fukuzawa, Yasuhiko Ohsawa, Yuuji Tanjo, Takuya Mihara, Takashi Kimura, Kazuo Sunahara, Manabu Suhara
  • Positive electrode material and cell for nonaquous electrolyte secondary battery
    Publication number: 20020004170
    Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-deficient manganese layered composite oxide represented by the general formula Li1−xMnO2−&dgr;. A lithium deficiency quantity x is in the range of 0.03<x≦0.5. An oxygen nonstoichiometry quantity &dgr; is equal to or smaller than 0.2.
    Type: Application
    Filed: February 26, 2001
    Publication date: January 10, 2002
    Applicant: NISSAN MOTOR CO., LTD. and SEIMI CHEMICAL CO., LTD.
    Inventors: Fumio Munakata, Tatsuhiro Fukuzawa, Yasuhiko Ohsawa, Yuuji Tanjo, Takuya Mihara, Takashi Kimura, Kazuo Sunahara, Manabu Suhara
  • Positive electrode material and battery for nonaquous electrolyte secondary battery
    Publication number: 20010024754
    Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li1−xMO2−y−&dgr;Fy. The second metallic element or constituent M may be Mn or a combination of Mn and substitute metal such as Co, Ni, Cr, Fe, Al, Ga or In. A lithium deficiency quantity x is in the range of 0<x<1. An oxygen defect quantity &dgr; may be equal to or smaller than 0.2. A quantity y of fluorine substituting for part of oxygen is greater than zero.
    Type: Application
    Filed: February 26, 2001
    Publication date: September 27, 2001
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Tatsuhiro Fukuzawa, Fumio Munakata, Yasuhiko Ohsawa, Yuuji Tanjo, Takuya Mihara, Takashi Kimura, Kazuo Sunahara, Manabu Suhara
  • Positive electrode material and battery for nonaquous electrolyte secondary battery
    Publication number: 20010024753
    Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li1-xMn1-yMyO2-&dgr;. The lithium-containing manganese composite oxide is deficient in lithium with respect to the stoichiometric composition of a layered crystal structure represented by the general formula LiMeO2. Part of Mn is replaced by a substitute metal such as Co, Ni, Fe, Al, Ga, In, V, Nb, Ta, Ti, Zr, Ce or Cr.
    Type: Application
    Filed: February 26, 2001
    Publication date: September 27, 2001
    Applicant: NISSAN MOTOR CO., LTD and SEIMI CHEMICAL CO., LTD.
    Inventors: Fumio Munakata, Tatsuhiro Fukuzawa, Yasuhiko Ohsawa, Yuuji Tanjo, Takuya Mihara, Takashi Kimura, Kazuo Sunahara, Manabu Suhara