Patents by Inventor Motoharu Saito

Motoharu 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: 20200036005
    Abstract: A positive electrode active material for a non-aqueous-electrolyte secondary battery contains a nickel-containing lithium transition metal oxide and is a primary particle alone of a lithium transition metal oxide that contains nickel in an amount of 80 mol % or more relative to the whole molar quantity of a metal element other than lithium or a secondary particle formed by aggregation of two to five particles. A rare earth compound and a magnesium compound adhere to the surface of the primary particle alone or the secondary particle.
    Type: Application
    Filed: February 13, 2018
    Publication date: January 30, 2020
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Daizo Jito, Takeshi Ogasawara, Akihiro Kawakita, Motoharu Saito
  • Patent number: 10483594
    Abstract: A positive electrode plate (11) includes a current collector (30) and a mixture layer (31) disposed on the current collector (30). The mixture layer (31) has a thin portion (32) with a thickness of less than 200 ?m disposed on an inner coil half of the current collector (30) and a thick portion (33) having a larger thickness than the thin portion (32), the thick portion (33) having a yield loop height H measured by a stiffness test of 6 mm<H<15 mm.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: November 19, 2019
    Assignees: PANASONIC CORPORATION, SANYO Electric Co., Ltd.
    Inventors: Hiroshi Kawada, Motoharu Saito, Kenichi Hotehama, Yoshinori Aoki
  • Publication number: 20180375096
    Abstract: There is provided a positive electrode active material for a non-aqueous-electrolyte secondary battery, the material being represented by a compositional formula LixNiyCo?Al?SizO2?y (where x, y, ?, ?, z, and ? are within specific ranges and satisfy 0.95<x<1.05, 0.80<y<1, 0<?<0.15, 0<p<0.05, 0<?<0.5, y+?+?=1, 0<z<0.02, and 0??<0.05) and having a layered crystal structure belonging to the space group R-3m. The positive electrode active material contains a layered oxide having the half width n of a diffraction peak for the (211) plane in an X-ray diffraction pattern within 0.28°?n?0.50°.
    Type: Application
    Filed: December 15, 2016
    Publication date: December 27, 2018
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yoshinori AOKI, Motoharu SAITO, Takeshi OGASAWARA
  • Publication number: 20180013173
    Abstract: A positive electrode plate (11) includes a current collector (30) and a mixture layer (31) disposed on the current collector (30). The mixture layer (31) has a thin portion (32) with a thickness of less than 200 ?m disposed on an inner coil half of the current collector (30) and a thick portion (33) having a larger thickness than the thin portion (32), the thick portion (33) having a yield loop height H measured by a stiffness test of 6 mm<H<15 mm.
    Type: Application
    Filed: September 29, 2015
    Publication date: January 11, 2018
    Applicants: Panasonic Corporation, Sanyo Electric Co., Ltd.
    Inventors: Hiroshi Kawada, Motoharu Saito, Kenichi Hotehama, Yoshinori Aoki
  • Publication number: 20160351901
    Abstract: A nonagueous electrolyte secondary battery has a positive electrode including a positive electrode active material which contains as a main component a lithium composite oxide containing at least cobalt, the lithium composite oxide having a crystal structure belonging to the space group P63mc and categorized as an O2 structure. The BET specific surface area of the lithium composite oxide is less than 0.6 m2/g. In the nonaqueous electrolyte secondary battery, the charge cutoff potential of the positive electrode is higher than 4.5 V (vs. Li/Li+).
    Type: Application
    Filed: January 8, 2015
    Publication date: December 1, 2016
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventor: Motoharu Saito
  • Patent number: 9350045
    Abstract: The nonaqueous electrolyte secondary battery includes: a positive electrode containing a positive-electrode active material; a negative electrode; and a nonaqueous electrolyte. The positive-electrode active material contains a lithium-containing oxide obtained by ion-exchanging part of sodium in a cobalt-containing oxide containing lithium, sodium, and titanium with lithium.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: May 24, 2016
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Motoharu Saito, Shinnosuke Ichikawa, Katsunori Yanagida, Masahisa Fujimoto
  • Patent number: 9318740
    Abstract: A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-containing oxide Lix1Nay1Co?Mn?O?, where 0.66<x1<1.1, 0<y1?0.02, 0.75??<1, 0<??0.25, and 1.9???2.1.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: April 19, 2016
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Motoharu Saito, Masahisa Fujimoto
  • Publication number: 20150132666
    Abstract: There is provided a positive electrode for a nonaqueous electrolyte secondary battery, the positive electrode being capable of improving the charge-discharge cycle characteristics of the nonaqueous electrolyte secondary battery. A positive electrode 12 of a nonaqueous electrolyte secondary battery 1 contains positive electrode active material particles. The positive electrode active material particles contain a lithium-containing transition metal oxide. The lithium-containing transition metal oxide has a crystal structure that belongs to the space group P63mc. A compound of at least one selected from the group consisting of boron, zirconium, aluminum, magnesium, titanium, and a rare-earth element is attached to surfaces of the positive electrode active material particles.
    Type: Application
    Filed: December 28, 2012
    Publication date: May 14, 2015
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Atsushi Ogata, Takeshi Ogasawara, Yasufumi Takahashi, Motoharu Saito, Masaki Hirase, Katsunori Yanagida, Masahisa Fujimoto
  • Publication number: 20140079990
    Abstract: The present invention provides a nonaqueous electrolyte battery having a high charge-discharge efficiency. The nonaqueous electrolyte battery of the present invention is a nonaqueous electrolyte battery including a positive electrode containing a positive electrode active material, a negative electrode, and a nonaqueous electrolyte, the positive electrode active material contains a lithium transition metal oxide having a crystalline structure belonging to the P63mc space group, and the nonaqueous electrolyte contains a fluorinated cyclic carbonate ester and a fluorinated chain ester.
    Type: Application
    Filed: May 22, 2012
    Publication date: March 20, 2014
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Katsunori Yanagida, Motoharu Saito
  • Publication number: 20130011741
    Abstract: A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material containing a lithium-containing oxide active material, a negative electrode, and a non-aqueous electrolyte. The lithium-containing oxide active material is represented by the general formula LiaMgbMO2±? where 0.65?a?1.05, 0<b?0.3, 0???0.3, and M is at least one of manganese and cobalt.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 10, 2013
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Motoharu Saito, Sho Tsuruta, Masahisa Fujimoto
  • Patent number: 8349496
    Abstract: A non-aqueous electrolyte secondary battery having a negative electrode, a non-aqueous electrolyte, and a positive electrode having a positive electrode active material comprising sodium oxide, is characterized in that the sodium oxide contains lithium, and the molar amount of the lithium is less than the molar amount of the sodium.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: January 8, 2013
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Motoharu Saito, Hideyuki Koga, Katsutoshi Takeda, Masahisa Fujimoto
  • Publication number: 20120279055
    Abstract: A non-aqueous electrolyte battery has a working electrode 1 having a positive electrode active material, a counter electrode 2, and a non-aqueous electrolyte containing lithium. The positive electrode active material includes a lithium pre-doped transition metal oxide prepared by pre-doping lithium into a sodium-containing transition metal oxide having an initial charge-discharge efficiency of higher than 100% as determined by charging and discharging using a lithium metal negative electrode as a counter electrode, and the sodium-containing transition metal oxide is represented by the compositional formula NaaLibMO2±?, where 0.5?a<1.0, 0<b?0.5, 0?a?0.1, and M is at least one element selected from the group consisting of Ni, Co, and Mn.
    Type: Application
    Filed: July 18, 2012
    Publication date: November 8, 2012
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Sho Tsuruta, Motoharu Saito, Katsunori Yanagida, Masahisa Fujimoto
  • Patent number: 8287606
    Abstract: A method of manufacturing a non-aqueous electrolyte secondary battery by subjecting a sodium-magnesium-containing oxide represented by the general formula NacMgbMO2±a, where 0.65?c?0.75, 0<b?0.3, 0?a?03, and M is at least one of manganese and cobalt, to ion-exchange of sodium for lithium by using a molten salt, an aqueous solution, or an organic solvent, to prepare a positive electrode active material.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: October 16, 2012
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Motoharu Saito, Sho Tsuruta, Masahisa Fujimoto
  • Patent number: 8263263
    Abstract: A positive electrode active material is made of sodium containing oxide. The sodium containing oxide contains NaALiBMO2±? that belongs to a space group P63/mmc of a hexagonal system, where the M includes at least one of manganese (Mn) and cobalt (Co). In the NaALiBMO2±?, the composition ratio A of sodium (Na) is not less than 0.5 and not more than 1.1, the composition ratio B of lithium (Li) is larger than 0 and not more than 0.3, and the ? is not less than 0 and not more than 0.3.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: September 11, 2012
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Motoharu Saito, Katsutoshi Takeda, Masahisa Fujimoto, Hiroshi Sawada
  • Publication number: 20120135319
    Abstract: A non-aqueous electrolyte secondary battery having a negative electrode, a non-aqueous electrolyte, and a positive electrode having a positive electrode active material comprising sodium oxide, is characterized in that the sodium oxide contains lithium, and the molar amount of the lithium is less than the molar amount of the sodium.
    Type: Application
    Filed: February 9, 2012
    Publication date: May 31, 2012
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Motoharu SAITO, Hideyuki KOGA, Katsutoshi TAKEDA, Masahisa FUJIMOTO
  • Patent number: 8178243
    Abstract: A method of producing a non-aqueous electrolyte secondary battery having a negative electrode, a non-aqueous electrolyte, and a positive electrode having a positive electrode active material comprising sodium oxide, characterized in that: the sodium oxide contains lithium; and the molar amount of the lithium is less than the molar amount of the sodium.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: May 15, 2012
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Motoharu Saito, Hideyuki Koga, Katsutoshi Takeda, Masahisa Fujimoto
  • Publication number: 20120082897
    Abstract: The nonaqueous electrolyte secondary battery includes: a positive electrode containing a positive-electrode active material; a negative electrode; and a nonaqueous electrolyte. The positive-electrode active material contains a lithium-containing oxide obtained by ion-exchanging part of sodium in a cobalt-containing oxide containing lithium, sodium, and titanium with lithium.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 5, 2012
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Motoharu Saito, Shinnosuke Ichikawa, Katsunori Yanagida, Masahisa Fujimoto
  • Patent number: 8067118
    Abstract: A mixed positive electrode active material is used. The mixed positive electrode active material is obtained by mixing a layered oxide whose initial charge-discharge efficiency when lithium metal is used for a counter electrode is less than 100% (hereinafter referred to as a first layered oxide) and a layered oxide whose initial charge-discharge efficiency is 100% or more (hereinafter referred to as a second layered oxide). Examples of the first layered oxide include Li1+aMnxCoyNizO2. A sodium oxide such as LiANaBMnXCoYNiZO2 other than a layered compound from which lithium is previously extracted by acid treatment or the like can be used as the second layered oxide whose initial charge-discharge efficiency is 100% or more. A layered oxide obtained by replacing (ion exchange) sodium in the foregoing LiANaBMnXCoYNiZO2 with lithium can be also used as the second layered oxide.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: November 29, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Motoharu Saito, Hideyuki Koga, Katsutoshi Takeda, Hiroshi Sawada, Masahisa Fujimoto
  • Patent number: 8048564
    Abstract: A positive electrode active material is formed of a lithium containing layered oxide. The lithium containing layered oxide contains either or both of LiANaBMnxCoyO2±? that belongs to a space group P63mc or LiANaBMnxCoyO2±? that belongs to a space group Cmca. The lithium containing layered oxide contains the LiANaBMnxCoyO2±? as a solid solution, a mixture or both of them. In the LiANaBMnxCoyO2±?, 0.5?A?1.2, 0<B?0.01, 0.40?x?0.55, 0.40?y?0.55, 0.80?x+y?1.10 and 0???0.3.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: November 1, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Motoharu Saito, Masahisa Fujimoto, Katsutoshi Takeda
  • Publication number: 20110244332
    Abstract: A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-containing oxide Lix1Nay1Co?Mn?O?, where 0.66<x1<1.1, 0<y1?0.02, 0.75??<1, 0<??0.25, and 1.9???2.1.
    Type: Application
    Filed: March 28, 2011
    Publication date: October 6, 2011
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Motoharu SAITO, Masahisa FUJIMOTO