Patents by Inventor Minoru Kotato

Minoru Kotato 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: 20110274986
    Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode having a positive-electrode active material, a negative electrode having a negative-electrode active material, and a nonaqueous electrolytic solution having a nonaqueous solvent dissolving a solute. The negative-electrode active material includes powdered silicon and/or a silicon alloy, the nonaqueous electrolytic solution includes additives composed of at least one fluorinated lithium phosphate selected from the group consisting of lithium monofluorophosphate, lithium difluorophosphate, and lithium trifluorophosphate and a diisocyanate compound, and the nonaqueous solvent includes a chain carbonate compound.
    Type: Application
    Filed: May 9, 2011
    Publication date: November 10, 2011
    Applicants: MITSUBISHI CHEMICAL CORPORATION, SANYO ELECTRIC CO., LTD.
    Inventors: Hidekazu Yamamoto, Kouhei Tuduki, Taizou Sunano, Maruo Kamino, Youichi Ohashi, Minoru Kotato
  • Patent number: 8043745
    Abstract: A non-aqueous electrolyte solution having a large capacity, exhibits high storage characteristics and cycle characteristics, and is capable if inhibiting gas generation. The non-aqueous electrolyte solution contains a lithium salt and a non-aqueous solvent, and a cyclic carbonate compound having an unsaturated bond in a concentration of 0.01 weight % or higher and 8 weight % or lower; and a compound expressed by a formula (IIb) in a concentration of 0.01 weight % or higher and 5 weight % or lower: wherein Z5 represents an integer of 2 or larger, X5 represents a linkage group comprising one or more atoms selected from the group consisting of a carbon atom, a hydrogen atom, a fluorine atom and an oxygen atom, and the fluoro sulfonyl group is bound to a carbon atom of the linkage group.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: October 25, 2011
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Minoru Kotato, Takashi Fujii
  • Publication number: 20110229771
    Abstract: A nonaqueous electrolyte which contains a nonaqueous organic solvent and a lithium salt dissolved therein is provided. Also provided is a lithium secondary battery employing the nonaqueous electrolyte.
    Type: Application
    Filed: May 31, 2011
    Publication date: September 22, 2011
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Masamichi ONUKI, Minoru Kotato, Isao Konno, Shinichi Kinoshita, Noriko Shima
  • Patent number: 8007938
    Abstract: A non-aqueous electrolyte solution is provided that realizes a large capacity, exhibits high storage characteristics and cycle characteristics, and is capable of inhibiting gas generation.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: August 30, 2011
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Minoru Kotato, Asao Kominato
  • Publication number: 20110159380
    Abstract: A nonaqueous electrolyte which contains a nonaqueous organic solvent and a lithium salt dissolved therein is provided. Also provided is a lithium secondary battery employing the nonaqueous electrolyte.
    Type: Application
    Filed: March 7, 2011
    Publication date: June 30, 2011
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Masamichi ONUKI, Minoru Kotato, Isao Konno, Shinichi Kinoshita, Noriko Shima
  • Publication number: 20110123871
    Abstract: Disclosed is a nonaqueous electrolytic solution which enables formation of a nonaqueous-electrolyte battery having high capacity and excellent storage characteristics at high temperatures, while sufficiently enhancing safety at the time of overcharge. A nonaqueous-electrolyte battery produced by using the nonaqueous electrolytic solution is also disclosed. The nonaqueous electrolytic solution comprises an electrolyte and a nonaqueous solvent, and includes any of specific nonaqueous electrolytic solutions (A) to (D).
    Type: Application
    Filed: February 27, 2009
    Publication date: May 26, 2011
    Applicant: Mitsubishi Chemcial
    Inventors: Yumiko Nakagawa, Minoru Kotato, Daisuke Noda, Shinichi Kinoshita
  • Publication number: 20110070485
    Abstract: A non-aqueous electrolyte solution is provided that realizes a large capacity, exhibits high storage characteristics and cycle characteristics, and is capable of inhibiting gas generation. The non-aqueous electrolyte solution comprises a lithium salt and a non-aqueous solvent, and further comprises: a cyclic carbonate compound having an unsaturated bond in a concentration of 0.01 weight % or higher and 8 weight % or lower; and a compound expressed by general formula (Ia) in a concentration of 0.01 weight % or higher and 5 weight % or lower. (in the formula (Ia), R11 and R12 represent, independently of each other, an organic group that is composed of one or more carbon atoms and hydrogen atoms and may optionally contain one or more oxygen atoms but excludes unsaturated bonds, provided that at least either R11 or R12 has an ether linkage. The total number of carbon atoms of R11 and R12 is between 3 and 18, and the total number of oxygen atoms contained in R11 and R12 is between 1 and 6.
    Type: Application
    Filed: December 1, 2010
    Publication date: March 24, 2011
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Minoru Kotato, Kunihisa Shima, Shinichi Kinoshita, Asao Kominato, Takashi Fujii, Teppei Yamada
  • Publication number: 20100227226
    Abstract: A nonaqueous electrolyte which contains a nonaqueous organic solvent and a lithium salt dissolved therein is provided. Also provided is a lithium secondary battery employing the nonaqueous electrolyte.
    Type: Application
    Filed: May 17, 2010
    Publication date: September 9, 2010
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Masamichi ONUKI, Minoru Kotato, Isao Konno, Shinichi Kinoshita, Noriko Shima
  • Publication number: 20100227218
    Abstract: A non-aqueous electrolyte secondary battery wherein the non-aqueous electrolyte contains a non-aqueous solvent, a solute dissolved in the non-aqueous solvent, and hydrogenated terphenyl, the solute includes a boron-containing alkali salt and a boron-free alkali salt, the negative electrode includes a negative electrode active material comprising a randomly oriented carbon composite (A), and the carbon composite (A) contains a graphitic carbon substance (B) and a carbon substance (C) that is different from the graphitic carbon substance (B).
    Type: Application
    Filed: February 23, 2007
    Publication date: September 9, 2010
    Inventors: Takaharu Morikawa, Atsushi Ueda, Takafumi Oura, Shinichi Kinoshita, Minoru Kotato, Hideharu Satou, Hitoshi Matsumoto
  • Publication number: 20100119956
    Abstract: An object is to provide a nonaqueous electrolyte and a nonaqueous-electrolyte secondary battery which have excellent discharge load characteristics and are excellent in high-temperature storability, cycle characteristics, high capacity, continuous-charge characteristics, storability, gas evolution inhibition during continuous charge, high-current-density charge/discharge characteristics, discharge load characteristics, etc. The object has been accomplished with a nonaqueous electrolyte which comprises: a monofluorophosphate and/or a difluorophosphate; and further a compound having a specific chemical structure or specific properties.
    Type: Application
    Filed: April 4, 2008
    Publication date: May 13, 2010
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Hiroyuki Tokuda, Takashi Fujii, Minoru Kotato, Masahiro Takehara, Masamichi Onuki, Youichi Ohashi, Shinichi Kinoshita
  • Publication number: 20100099031
    Abstract: A subject is to provide a nonaqueous electrolyte excellent in cycle performances such as capacity retention after cycling, output after cycling, discharge capacity after cycling, and cycle discharge capacity ratio, output characteristics, high-temperature storability, low-temperature discharge characteristics, heavy-current discharge characteristics, high-temperature storability, safety, high capacity, high output, high-current-density cycle performances, compatibility of these performances, etc. Another subject is to provide a nonaqueous-electrolyte secondary battery employing the nonaqueous electrolyte. The subjects have been accomplished with a nonaqueous electrolyte which contains a monofluorophosphate and/or a difluorophosphate and further contains a compound having a specific chemical structure or specific properties.
    Type: Application
    Filed: October 16, 2009
    Publication date: April 22, 2010
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Ryoichi Kato, Hiroyuki Tokuda, Takashi Fujii, Minoru Kotato, Masahiro Takehara, Masamichi Onuki, Youichi Ohashi, Shinichi Kinoshita
  • Publication number: 20100035147
    Abstract: A nonaqueous electrolytic solution that can provide a battery that is low in gas generation, has a large capacity, and is excellent in storage characteristics and cycle characteristics contains an electrolyte and a nonaqueous solvent dissolving the electrolyte and further contains 0.001 vol % or more and less than 1 vol % of a compound represented by Formula (1) in the nonaqueous solvent. Alternatively, the nonaqueous electrolytic solution contains 0.001 vol % or more and less than 5 vol % of a compound represented by Formula (1) in the nonaqueous solvent and further contains at least one compound selected from the group consisting of cyclic carbonate compounds having carbon-carbon unsaturated bonds, cyclic carbonate compounds having fluorine atoms, monofluorophosphates, and difluorophosphates. In Formula (1), R1 to R3 each independently represent an alkyl group of 1 to 12 carbon atoms, which may be substituted by a halogen atom; and n represents an integer of 0 to 6.
    Type: Application
    Filed: March 17, 2008
    Publication date: February 11, 2010
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Minoru Kotato, Shinichi Kinoshita
  • Publication number: 20100021823
    Abstract: The invention relates to a nonaqueous electrolyte which comprises a nonaqueous organic solvent and a lithium salt dissolved therein, wherein the nonaqueous organic solvent contains at least one compound selected from the group consisting of acid anhydrides and carbonic esters having an unsaturated bond, and at least one compound selected from the group consisting of sulfonic compounds and fluorine-containing aromatic compounds having 9 carbon atoms or less; and a lithium secondary battery employing the same.
    Type: Application
    Filed: June 22, 2009
    Publication date: January 28, 2010
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Masamichi Onuki, Minoru Kotato, Isao Konno, Shinichi Kinoshita, Noriko Shima
  • Publication number: 20100015514
    Abstract: A lithium secondary battery comprising: a positive electrode and a negative electrode which each has a specific composition and specific properties; and a nonaqueous electrolyte which contains a cyclic siloxane compound represented by general formula (1), fluorosilane compound represented by general formula (2), compound represented by general formula (3), compound having an S—F bond in the molecule, nitric acid salt, nitrous acid salt, monofluorophosphoric acid salt, difluorophosphoric acid salt, acetic acid salt, or propionic acid salt in an amount of 10 ppm or more of the whole nonaqueous electrolyte. This lithium secondary battery has a high capacity, long life, and high output. [In general formula (1), R1 and R2 are an organic group having 1-12 carbon atoms and n is an integer of 3-10. In general formula (2), R3 to R5 are an organic group having 1-12 carbon atoms; x is an integer of 1-3; and p, q, and r each are an integer of 0-3, provided that 1?p+q+r?3.
    Type: Application
    Filed: October 19, 2006
    Publication date: January 21, 2010
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Hidekazu Miyagi, Ryoichi Kato, Masakazu Yokomizo, Hiroyuki Uono, Hitoshi Matsumoto, Tomohiro Satou, Minoru Kotato, Takayuki Nakajima, Hitoshi Suzuki, Hiroyuki Oshima
  • Publication number: 20090253045
    Abstract: Nonaqueous electrolytes capable of providing a battery having a high capacity and excellent in storability and cycle characteristics are provided. Also provided are nonaqueous-electrolyte batteries produced with the electrolytes. The nonaqueous electrolytes include ones which (1) contains a cyclic carbonate having an unsaturated bond and further contains a fluorinated cyclic carbonate having two or more fluorine atoms, (2) contains an aromatic compound having 7-18 carbon atoms in total and further contains a fluorinated cyclic carbonate having two or more fluorine atoms, (3) contains diethyl carbonate and further contains a fluorinated cyclic carbonate having two or more fluorine atoms, or (4) contains at least one compound selected from the group consisting of cyclic sulfonic acid ester compounds, di-sulfonic acid ester compounds, nitrile compounds, and compounds represented by general formula (1) and further contains a fluorinated cyclic carbonate having two or more fluorine atoms.
    Type: Application
    Filed: May 31, 2007
    Publication date: October 8, 2009
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Minoru Kotato, Shinichi Kinoshita
  • Patent number: 7575833
    Abstract: The invention relates to a nonaqueous electrolyte which comprises a nonaqueous organic solvent and a lithium salt dissolved therein, wherein the nonaqueous organic solvent contains at least one compound selected from the group consisting of acid anhydrides and carbonic esters having an unsaturated bond, and at least one compound selected from the group consisting of sulfonic compounds and fluorine-containing aromatic compounds having 9 carbon atoms or less; and a lithium secondary battery employing the same.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: August 18, 2009
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Minoru Kotato, Isao Konno, Shinichi Kinoshita
  • Publication number: 20070254215
    Abstract: Disclosed is a non-aqueous electrolyte containing a non-aqueous solvent, a solute dissolved in the non-aqueous solvent, and a hydrogenated terphenyl. The solute comprises an alkali salt containing boron and an alkali salt containing no boron. An amount of the hydrogenated terphenyl contained in the non-aqueous electrolyte is preferably 0.5 mass % to 3.5 mass %. For example, LiBF4, NaBF4 or KBF4 is used as the alkali salt containing boron, while LiPF6, LiClO4, LiAsF6, LiCF3SO3, LiN(SO2CF3)2, LiN(SO2C2F5)2 or LiC(SO2CF3)3 is used as the alkali salt containing no boron.
    Type: Application
    Filed: August 29, 2005
    Publication date: November 1, 2007
    Inventors: Takaharu Morikawa, Takafumi Oura, Atsushi Otsuka, Shinichi Kinoshita, Minoru Kotato
  • Publication number: 20070238025
    Abstract: The invention relates to a nonaqueous electrolyte which comprises a nonaqueous organic solvent and a lithium salt dissolved therein, wherein the nonaqueous organic solvent contains at least one compound selected from the group consisting of acid anhydrides and carbonic esters having an unsaturated bond, and at least one compound selected from the group consisting of sulfonic compounds and fluorine-containing aromatic compounds having 9 carbon atoms or less; and a lithium secondary battery employing the same.
    Type: Application
    Filed: April 13, 2007
    Publication date: October 11, 2007
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Masamichi ONUKI, Minoru Kotato, Isao Konno, Shinichi Kinoshita, Noriko Shima
  • Publication number: 20070224514
    Abstract: A non-aqueous electrolyte solution is provided that realizes a large capacity, exhibits high storage characteristics and cycle characteristics, and is capable of inhibiting gas generation. The non-aqueous electrolyte solution comprises a lithium salt and a non-aqueous solvent, and further comprises: a cyclic carbonate compound having an unsaturated bond in a concentration of 0.01 weight % or higher and 8 weight % or lower; and a compound expressed by general formula (Ia) in a concentration of 0.01 weight % or higher and 5 weight % or lower. (in the formula (Ia), R11 and R12 represent, independently of each other, an organic group that is composed of one or more carbon atoms and hydrogen atoms and may optionally contain one or more oxygen atoms but excludes unsaturated bonds, provided that at least either R11 or R12 has an ether linkage. The total number of carbon atoms of R11 and R12 is between 3 and 18, and the total number of oxygen atoms contained in R11 and R12 is between 1 and 6.
    Type: Application
    Filed: April 19, 2005
    Publication date: September 27, 2007
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Minoru Kotato, Kunihisa Shima, Shinichi Kinoshita, Asao Kominato, Takashi Fujii, Teppei Yamada
  • Publication number: 20060172201
    Abstract: The present invention is directed to a non-aqueous electrolyte for lithium secondary battery, having both flame retardancy (self-extinguishing property) or nonflammability (having no flash point) and high conductivity and being electrochemically stable, and a lithium secondary battery using the non-aqueous electrolyte. Specifically, the non-aqueous electrolyte of the present invention comprises a non-aqueous solvent which comprises (a) at least one phosphate selected from (a1) a chain state phosphate and (a2) a cyclic phosphate as an essential component, and which may contain (b1) a cyclic carboxylate and (b2) a cyclic carbonate. Further, the non-aqueous electrolyte comprises the above non-aqueous solvent which further comprises (c1) a vinylene carbonate compound and/or (c2) a vinylethylene carbonate compound, and at least one compound selected from the group consisting of (d1) a cyclic amide compound, (d2) a cyclic carbamate compound, and (d3) a heterocyclic compound.
    Type: Application
    Filed: June 25, 2003
    Publication date: August 3, 2006
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Eiki Yasukawa, Kunihisa Shima, Asao Kominato, Ken-ichi Ishigaki, Xianming Wang, Takashi Fujii, Minoru Kotato, Yasuyuki Shigematsu, Tooru Fuse, Hideharu Satou