Patents by Inventor Nobutaka Chiba

Nobutaka Chiba 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: 20200381712
    Abstract: A negative electrode active material formed from a Si-containing alloy having a composition represented by Chemical Formula (1): SixSnyMzAaLib, wherein M represents one or two or more transition metal elements, A represents an inevitable impurity, and x, y, z, a, and b represent values of mass %, wherein 0<x<100, 0?y<100, 0<z<100, 0.2?b?1.5, a represents the balance, and x+y+z+a+b=100, is used in an electric device. The negative electrode active material improves cycle durability of an electric device such as a lithium ion secondary battery.
    Type: Application
    Filed: September 6, 2017
    Publication date: December 3, 2020
    Inventors: Masaya Arai, Manabu Watanabe, Nobutaka Chiba, Youichi Yoshioka
  • Patent number: 10840506
    Abstract: A negative electrode active material containing a Si-containing alloy having a composition to be represented by Chemical Formula (1): SixSnyMzAlwAa (in Chemical Formula (1) above, M is one or two or more transition metal elements, A is an unavoidable impurity, and x, y, z, w, and a represent values of percentage by mass, where y, z, and w are 2?y?10, 25?z?35, and 0.3?w?3, respectively, and x and a are remainder) is used in an electrical device, providing a means capable of improving the cycle durability of the electrical device such as a lithium ion secondary battery.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: November 17, 2020
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masaya Arai, Nobutaka Chiba, Youichi Yoshioka, Manabu Watanabe
  • Patent number: 10818920
    Abstract: A negative electrode active material having high cycle durability contains an alloy represented by the following chemical formula (1): SixSnyMzAa??(1) wherein M is Zn, A is unavoidable impurities, x, y, z, and a represent % by mass values, and in that case, 0<x<100, 0<y<100, 0<z<100, 0?a<0.5, and x+y+z+a=100, in which the half width of the diffraction peak of the (111) surface of Si in the range of 2?=24 to 33° by X ray diffraction measurement of the alloy using CuK? ray is 0.7° or more, and the x is more than 23 and less than 64, the y is 4 or more and less than 34, and the z is more than 0 and less than 65.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: October 27, 2020
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Fumihiro Miki, Manabu Watanabe, Nobutaka Chiba, Kei Kitaura, Tohru Wada
  • Patent number: 10651465
    Abstract: A negative electrode active material including a silicon-containing alloy having a ternary alloy composition expressed by Si—Sn—Ti and including a structure in which an a-Si phase containing amorphous or low-crystalline silicon formed by dissolving tin in a crystal structure of silicon is dispersed in a parent phase of a silicide phase including TiSi2, wherein when a peak intensity of a Si—O bond peak that is observed at a position where an interatomic distance in a radial wave function observed by XAFS is 0.13 nm is S(1) and a peak intensity of a Si—Si bond peak that is observed at a position where the interatomic distance is 0.2 nm is S(2), a relation of S(2)>S(1) is satisfied is used for an electrical device. When used, the negative electrode active material achieves both cycle durability and charging-discharging efficiency for an electrical device such as a lithium ion secondary battery.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: May 12, 2020
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Youichi Yoshioka, Nobutaka Chiba, Manabu Watanabe, Masaya Arai
  • Patent number: 10566608
    Abstract: The negative electrode for an electric device includes a current collector and an electrode layer containing a negative electrode active material, a conductive auxiliary agent and a binder and formed on a surface of the current collector, wherein the negative electrode active material contains an alloy represented by the following formula (1): SixSnyMzAa (in the formula (1), M is at least one metal selected from the group consisting of Al, V, C and a combination thereof, A is inevitable impurities, and x, y, z and a represent mass percent values and satisfy the conditions of 0<x<100, 0<y<100, 0<z<100, 0?a<0.5, and x+y+z+a=100), and elastic elongation of the current collector is 1.30% or greater.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: February 18, 2020
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Fumihiro Miki, Manabu Watanabe, Kensuke Yamamoto, Takashi Sanada, Nobutaka Chiba
  • Patent number: 10516161
    Abstract: A negative electrode active material includes a silicon-containing alloy represented by: SixSnyMzAa (A is unavoidable impurities, M is one or more transition metal elements, x, y, z, and a represent values of percent by mass, and 0<x<100, 0<y<100, 0<z<100, and 0?a<0.5 and x+y+z+a=100). The silicon-containing alloy has a lattice image subjected to Fourier transform processing to obtain a diffraction pattern. A distance between Si regular tetrahedrons is 0.39 nm or more when the distance between Si regular tetrahedrons in an amorphous region calculated from a Fourier image obtained by subjecting a diffraction ring portion present in a width of from 0.7 to 1.0 when a distance between Si regular tetrahedrons is 1.0 in this diffraction pattern to inverse Fourier transform is 10 nm or less.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: December 24, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tomohiro Kaburagi, Manabu Watanabe, Nobutaka Chiba, Humihiro Miki, Makoto Tanimura
  • Patent number: 10505184
    Abstract: A negative electrode active material for electric device is used which includes a silicon-containing alloy having a structure in which a silicide phase containing a silicide of a transition metal is dispersed in a parent phase containing amorphous or low crystalline silicon as a main component and a predetermined composition and in which a ratio value (B/A) of a diffraction peak intensity B of a silicide of a transition metal in a range of 2?=37 to 45° to a diffraction peak intensity A of a (111) plane of Si in a range of 2?=24 to 33° is 0.41 or more in an X-ray diffraction measurement of the silicon-containing alloy using a CuK?1 ray.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: December 10, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Humihiro Miki, Tomohiro Kaburagi, Manabu Watanabe, Nobutaka Chiba
  • Publication number: 20190312270
    Abstract: A negative electrode active material including a silicon-containing alloy having a ternary alloy composition expressed by Si—Sn—Ti and including a structure in which an a-Si phase containing amorphous or low-crystalline silicon formed by dissolving tin in a crystal structure of silicon is dispersed in a parent phase of a silicide phase including TiSi2, wherein when a peak intensity of a Si—O bond peak that is observed at a position where an interatomic distance in a radial wave function observed by XAFS is 0.13 nm is S(1) and a peak intensity of a Si—Si bond peak that is observed at a position where the interatomic distance is 0.2 nm is S(2), a relation of S(2)>S(1) is satisfied is used for an electrical device. When used, the negative electrode active material achieves both cycle durability and charging-discharging efficiency for an electrical device such as a lithium ion secondary battery.
    Type: Application
    Filed: June 16, 2016
    Publication date: October 10, 2019
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Youichi Yoshioka, Nobutaka Chiba, Manabu Watanabe, Masaya Arai
  • Patent number: 10403890
    Abstract: A negative electrode active material which has a ternary alloy composition represented by Si—Sn-M (M is one or two or more transition metal elements) and has a microstructure which has a first phase (silicide phase) having a silicide of a transition metal as a main component and a second phase partially containing Sn and having amorphous or low crystalline silicon as a main component, and further has partially a plurality of independent first phases and partially a eutectic structure of the first phase and the second phase is used for an electric device. The negative electrode active material improves cycle durability of an electric device such as a lithium ion secondary battery.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: September 3, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Nobutaka Chiba, Youichi Yoshioka, Tomohiro Kaburagi, Manabu Watanabe, Masaya Arai
  • Publication number: 20190214643
    Abstract: A negative electrode active material having high cycle durability contains an alloy represented by the following chemical formula (1): SixSnyMzAa??(1) wherein M is Zn, A is unavoidable impurities, x, y, z, and a represent % by mass values, and in that case, 0<x<100, 0<y<100, 0<z<100, 0?a<0.5, and x+y+z+a=100, in which the half width of the diffraction peak of the (111) surface of Si in the range of 2?=24 to 33° by X ray diffraction measurement of the alloy using CuK? ray is 0.7° or more, and the x is more than 23 and less than 64, the y is 4 or more and less than 34, and the z is more than 0 and less than 65.
    Type: Application
    Filed: March 12, 2019
    Publication date: July 11, 2019
    Inventors: Fumihiro Miki, Manabu Watanabe, Nobutaka Chiba, Kei Kitaura, Tohru Wada
  • Patent number: 10340519
    Abstract: To provide a means capable of improving the cycle durability of an electric device such as a lithium ion secondary battery. A negative electrode active material containing a silicon-containing alloy having ternary alloy composition represented by Si—Sn-M (M is one or two or more transition metal elements) or quaternary alloy composition represented by Si—Sn-M-Al (M is one or two or more transition metal elements) and having a structure wherein an a-Si phase containing amorphous or low crystalline silicon containing tin in a silicon crystal structure in form of a solid solution is dispersed in a silicide phase containing a silicide of a transition metal as a main component is used in an electric device. The negative electrode active material improves the cycle durability of an electric device such as a lithium ion secondary battery.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: July 2, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Nobutaka Chiba, Tomohiro Kaburagi, Youichi Yoshioka, Manabu Watanabe, Masaya Arai
  • Publication number: 20190173081
    Abstract: A negative electrode active material containing a Si-containing alloy having a composition to be represented by Chemical Formula (1): SixSnyMzAlwAa (in Chemical Formula (1) above, M is one or two or more transition metal elements, A is an unavoidable impurity, and x, y, z, w, and a represent values of percentage by mass, where y, z, and w are 2?y?10, 25?z?35, and 0.3?w?3, respectively, and x and a are remainder) is used in an electrical device, providing a means capable of improving the cycle durability of the electrical device such as a lithium ion secondary battery.
    Type: Application
    Filed: June 16, 2016
    Publication date: June 6, 2019
    Inventors: Masaya Arai, Nobutaka Chiba, Youichi Yoshioka, Manabu Watanabe
  • Patent number: 10297360
    Abstract: A negative electrode active material includes a silicon-containing alloy having a composition represented by: SixSnyMzAa (A is unavoidable impurities, M is one or more transition metal elements, x, y, z, and a represent values of percent by mass, and 0<x<100, 0<y<100, 0<z<100, and 0?a<0.5 and x+y+z+a=100). The silicon-containing alloy has a lattice image subjected to Fourier transform processing to obtain a diffraction pattern and a size determined as an average value of maximum five major axis diameters of regions having a periodic array from a Fourier image obtained by subjecting a diffraction ring portion present in a width of from 0.7 to 1.0 when a distance between Si regular tetrahedrons is 1.0 in this diffraction pattern to inverse Fourier transform is 10 nm or less.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: May 21, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tomohiro Kaburagi, Manabu Watanabe, Nobutaka Chiba, Humihiro Miki, Makoto Tanimura
  • Patent number: 10290855
    Abstract: A negative electrode for an electrical device includes: a current collector; and an electrode layer containing a negative electrode active material, an electrically-conductive auxiliary agent and a binder and formed on a surface of the current collector, wherein the negative electrode active material contains an alloy represented by a following formula (1): SixZnyMzAa (in the formula (1) M is at least one metal selected from the group consisting of V, Sn, Al, C and combinations thereof, A is inevitable impurity, and x, y, z and a represent mass percent values and satisfy 0<x<100, 0<y<100, 0<z<100, 0?a<0.5 and x+y+z+a=100), and elongation (?) of the electrode layer is 1.29<?<1.70%.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: May 14, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Kensuke Yamamoto, Manabu Watanabe, Fumihiro Miki, Takashi Sanada, Nobutaka Chiba
  • Patent number: 10290867
    Abstract: A negative electrode active material having high cycle durability contains an alloy represented by the following chemical formula (1): SixSnyMzAa??(1) (in the chemical formula (1), M is at least one metal selected from the group consisting of Ti, Zn, C, and combinations thereof, A is unavoidable impurities, x, y, z, and a represent % by mass values, and in that case, 0<x<100, 0<y<100, 0<z<100, 0?a<0.5, and x+y+z+a=100), in which the half width of the diffraction peak of the (111) surface of Si in the range of 2?=24 to 33° by X ray diffraction measurement of the alloy using the CuK? ray is 0.7° or more.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: May 14, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Fumihiro Miki, Manabu Watanabe, Nobutaka Chiba, Kei Kitaura, Tohru Wada
  • Patent number: 10276866
    Abstract: In an electric device the negative electrode active material layer includes a silicide phase containing a silicide of a transition metal is dispersed in a parent phase containing amorphous or low crystalline silicon as a main component, a predetermined composition, and a ratio value (B/A) of a diffraction peak intensity B of a silicide of a transition metal in a range of 2?=37 to 45° to a diffraction peak intensity A of a (111) plane of Si in a range of 2?=24 to 33° in a predetermined range in an X-ray diffraction measurement using a CuK?1 ray is used as a Si-containing alloy. A solid solution or an oxide-coated solid solution in which a coating layer containing an oxide in a predetermined amount is formed on the particle surface of the solid solution and is used in the positive electrode active material layer.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: April 30, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Manabu Watanabe, Tomohiro Kaburagi, Youichi Yoshioka, Hirokazu Komatsu, Nobutaka Chiba, Shinji Yamamoto
  • Publication number: 20180366725
    Abstract: To provide a means capable of improving the cycle durability of an electric device such as a lithium ion secondary battery. A negative electrode active material containing a silicon-containing alloy having ternary alloy composition represented by Si—Sn-M (M is one or two or more transition metal elements) or quaternary alloy composition represented by Si—Sn-M-Al (M is one or two or more transition metal elements) and having a structure wherein an a-Si phase containing amorphous or low crystalline silicon containing tin in a silicon crystal structure in form of a solid solution is dispersed in a silicide phase containing a silicide of a transition metal as a main component is used in an electric device. The negative electrode active material improves the cycle durability of an electric device such as a lithium ion secondary battery.
    Type: Application
    Filed: November 10, 2016
    Publication date: December 20, 2018
    Inventors: Nobutaka Chiba, Tomohiro Kaburagi, Youichi Yoshioka, Manabu Watanabe, Masaya Arai
  • Publication number: 20180351170
    Abstract: A negative electrode active material which has a ternary alloy composition represented by Si—Sn-M (M is one or two or more transition metal elements) and has a microstructure which has a first phase (silicide phase) having a silicide of a transition metal as a main component and a second phase partially containing Sn and having amorphous or low crystalline silicon as a main component, and further has partially a plurality of independent first phases and partially a eutectic structure of the first phase and the second phase is used for an electric device. The negative electrode active material improves cycle durability of an electric device such as a lithium ion secondary battery.
    Type: Application
    Filed: November 10, 2015
    Publication date: December 6, 2018
    Inventors: Nobutaka Chiba, Youichi Yoshioka, Tomohiro Kaburagi, Manabu Watanabe, Masaya Arai
  • Patent number: 10020551
    Abstract: A liquid activated air battery includes: an electrode assembly that includes an air electrode and a metal anode; a battery container that is capable of holding the electrode assembly and electrolytic solution; a supply tank for the electrolytic solution to be supplied to the battery container; a drainage tank for the electrolytic solution discharged from the battery container; and pumps as an electrolytic solution flow mechanism that runs the electrolytic solution from the supply tank to the drainage tank through the battery container. The composition of the electrolytic solution supplied to the battery container is kept constant, and stable power output is ensured.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: July 10, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Mori Nagayama, Yoshiko Tsukada, Nobutaka Chiba, Atsushi Miyazawa
  • Publication number: 20180131002
    Abstract: A negative electrode active material includes a silicon-containing alloy represented by: SixSnyMzAa (A is unavoidable impurities, M is one or more transition metal elements, x, y, z, and a represent values of percent by mass, and 0<x<100, 0<y<100, 0<z<100, and 0?a<0.5 and x+y+z+a=100). The silicon-containing alloy has a lattice image subjected to Fourier transform processing to obtain a diffraction pattern. A distance between Si regular tetrahedrons is 0.39 nm or more when the distance between Si regular tetrahedrons in an amorphous region calculated from a Fourier image obtained by subjecting a diffraction ring portion present in a width of from 0.7 to 1.0 when a distance between Si regular tetrahedrons is 1.0 in this diffraction pattern to inverse Fourier transform is 10 nm or less.
    Type: Application
    Filed: December 17, 2014
    Publication date: May 10, 2018
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Tomohiro Kaburagi, Manabu Watanabe, Nobutaka Chiba, Humihiro Miki, Makoto Tanimura