Patents by Inventor Fumiharu Niina

Fumiharu Niina 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: 20140329146
    Abstract: A positive-electrode active material of a nonaqueous electrolyte secondary battery is modified to improve the output characteristics under various temperature conditions, thereby making the nonaqueous electrolyte secondary battery suitable for a power supply for hybrid vehicles. The nonaqueous electrolyte secondary battery includes a working electrode 11, a counter electrode 12 containing a negative-electrode active material, and a nonaqueous electrolyte solution 14. In the working electrode 11, a positive-electrode mixture layer containing a granular positive-electrode active material and a binder is disposed on both sides of a positive-electrode collector. The positive-electrode active material contains a lithium transition metal oxide Li1.07Ni0.46Co0.19Mn0.28O2 and a tungsten trioxide attached to part of the surface of the lithium transition metal oxide.
    Type: Application
    Filed: June 29, 2012
    Publication date: November 6, 2014
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Fumiharu Niina, Hiroshi Kawada, Toshikazu Yoshida, Yoshinori Kida
  • Publication number: 20140227599
    Abstract: A positive electrode active material capable of improving an output performance of a nonaqueous electrolyte secondary battery is provided. A positive electrode active material of a nonaqueous electrolyte secondary battery 1 contains a first positive electrode active material and a second positive electrode active material. In the first positive electrode active material, the content of cobalt is 15% or more on an atomic percent basis in transition metals. In the second positive electrode active material, the content of cobalt is 5% or less on an atomic percent basis in transition metals. An average secondary particle diameter r1 of the first positive electrode active material is smaller than an average secondary particle diameter r2 of the second positive electrode active material.
    Type: Application
    Filed: August 30, 2012
    Publication date: August 14, 2014
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Daisuke Nishide, Fumiharu Niina, Hiroshi Kawada, Toshikazu Yoshida, Yoshinori Kida
  • Publication number: 20130323606
    Abstract: The present invention is aimed at providing a nonaqueous electrolyte secondary battery capable of improving cycling characteristics by improving a positive electrode active material when particles with a structure in which primary particles are aggregated to front, secondary particles are used as the positive electrode active material of the nonaqueous electrolyte secondary battery, thereby permitting preferred use as a power supply of a hybrid electric car or the like. The positive electrode active material includes secondary particles 20 composed of aggregated primary particles 21, the primary particles 21 have an aspect ratio of 2.0 or more and 10.0 or less, and in powder X-ray diffraction measurement using CuK? ray, the positive electrode active material satisfies 0.10°?FWHM110 ?0.30° wherein FWHM110 represents a full width at half maximum of a 110 diffraction peak present within a range of diffraction angle 2? of 64.5°±1.0°.
    Type: Application
    Filed: December 28, 2011
    Publication date: December 5, 2013
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Toshikazu Yoshida, Fumiharu Niina, Hiroshi Kawada, Yoshinori Kida
  • Publication number: 20130017448
    Abstract: In a nonaqueous electrolyte secondary battery including a positive electrode (11) whose surface has a positive electrode mixture layer containing a mixture of a conductive carbon material and a positive electrode active material containing a lithium-containing transition metal composite oxide having a layer structure and represented by the general formula LiaNixM(1-x)O2 (where M represents one or more kinds of elements, and a and x satisfy the conditions 0<a?1.2 and 0.4?x?1, respectively), the proportion of carbon atoms relative to the total atoms on the surface of the positive electrode is made to be not less than 80%.
    Type: Application
    Filed: March 10, 2011
    Publication date: January 17, 2013
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Akihiro Suzuki, Fumiharu Niina, Shingo Tode, Toshikazu Yoshida, Yoshinori Kida
  • Publication number: 20120135315
    Abstract: A non-aqueous electrolyte secondary battery is provided that uses as a positive electrode active material a low-cost lithium-containing transition metal composite oxide containing Ni and Mn as its main components, to improve the output power characteristics so that it can be used suitably for an electric power source for, for example, hybrid electric vehicles. A non-aqueous electrolyte secondary battery has a positive electrode (11) containing a positive electrode active material, a negative electrode (12) containing a negative electrode active material, and a non-aqueous electrolyte solution (14) in which a solute is dissolved in a non-aqueous solvent. In the positive electrode active material, Nb2O5 in which the amount of niobium is 0.5 mol % with respect to the total amount of the transition metals and TiO2 in which the amount of titanium is 0.5 mol % with respect to the total amount of the transition metals are disposed on a surface of Li1.06Ni10.56Mn10.38O2.
    Type: Application
    Filed: August 6, 2010
    Publication date: May 31, 2012
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Fumiharu Niina, Akihiro Suzuki, Toshikazu Yoshida, Shingo Tode, Yoshinori Kida, Hiroyuki Fujimoto
  • Publication number: 20120052391
    Abstract: The electrode for the nonaqueous electrolyte secondary battery includes a current collector and an active material layer formed on the current collector and containing an active material. The active material contains first and second particulate lithium-containing transition metal oxides of different voidages.
    Type: Application
    Filed: July 18, 2011
    Publication date: March 1, 2012
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Akihiro Suzuki, Fumiharu Niina, Toshikazu Yoshida, Yoshinori Kida, Shin Fujitani
  • Publication number: 20120013050
    Abstract: A non-aqueous electrolyte secondary battery having a positive electrode (11) containing a positive electrode active material, a negative electrode (12) containing a negative electrode active material, and a non-aqueous electrolyte solution (14) in which a solute is dissolved in a non-aqueous solvent. The positive electrode active material is obtained by sintering a titanium-containing oxide on a surface of a layered lithium-containing transition metal oxide represented by the general formula Li1+xNiaMnbCocO2+d, where x, a, b, c, and d satisfy the conditions x+a+b+c=1, 0.7?a+b, 0<x?0.1, 0?c/(a+b)<0.35, 0.7?a/b?2.0, and ?0.1?d?0.1.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 19, 2012
    Inventors: Chihiro Yada, Fumiharu Niina, Hiroshi Nakagawa, Hiroyuki Fujimoto
  • Publication number: 20110177391
    Abstract: A non-aqueous electrolyte secondary battery using lithium-containing transition metal composite oxide which has a layer structure, contains a lot of Ni and Mn and is inexpensive as a positive electrode active material and attaining high output characteristics even under low temperature environment is provided. The non-aqueous electrolyte secondary battery includes a positive electrode 11 containing a positive electrode active material, a negative electrode 12 containing a negative electrode active material and a non-aqueous electrolyte 14 having lithium ion conductivity, wherein lithium-containing transition metal composite oxide having a layer structure and being represented by a general formula Li1+xNiaMnbCocO2+d wherein x, a, b, c and d satisfy x+a+b+c=1, 0.25?a?0.60, 0.25?b?0.60, 0?c?0.40, 0?x?0.10, 0.7?a/b?2.0 and ?0.1?d?0.
    Type: Application
    Filed: September 17, 2009
    Publication date: July 21, 2011
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Kazunari Ookita, Fumiharu Niina, Hiroyuki Fujimoto, Chihiro Yada
  • Publication number: 20090305136
    Abstract: A non-aqueous electrolyte secondary battery has a positive electrode (11) containing a positive electrode active material, a negative electrode (12) containing a negative electrode active material, and a non-aqueous electrolyte solution (14) in which a solute is dissolved in a non-aqueous solvent. The positive electrode active material is obtained by sintering a titanium-containing oxide on a surface of a layered lithium-containing transition metal oxide represented by the general formula Li1+xNiaMnbCocO2+d, where x, a, b, c, and d satisfy the conditions x+a+b+c=1, 0.7?a+b, 0?x?0.1, 0?c/(a+b)<0.35, 0.7?a/b?2.0, and ?0.1?d?0.1.
    Type: Application
    Filed: February 23, 2009
    Publication date: December 10, 2009
    Inventors: Chihiro Yada, Fumiharu Niina, Hiroshi Nakagawa, Hiroyuki Fujimoto
  • Publication number: 20090239146
    Abstract: A non-aqueous electrolyte secondary battery includes: a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material; and a non-aqueous electrolyte having lithium ion conductivity. The positive electrode includes a lithium-containing transition metal oxide having a layered structure and being represented by the general formula Li1+x(NiaMnbCoc)O2+?, where x+a+b+c=1, 0.7?a+b, 0?x?0.1, 0?c/(a+b)<0.35, 0.7?a/b?2.0, and ?0.1???0.1. The non-aqueous electrolyte contains a lithium salt having an oxalato complex as an anion.
    Type: Application
    Filed: March 17, 2009
    Publication date: September 24, 2009
    Inventors: Hiroshi NAKAGAWA, Chihiro Yada, Fumiharu Niina, Hiroyuki Fujimoto