Patents by Inventor Takashi Kuboki

Takashi Kuboki 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: 20150086873
    Abstract: A negative electrode for nonaqueous electrolyte secondary battery of an embodiment includes a current collector, and a negative electrode mixture layer arranged on the current collector. The negative electrode mixture layer includes a negative electrode active material, a conductive material, and a binder. The negative electrode active material is composite particles including a carbonaceous substance, a silicon oxide phase in the carbonaceous substance, and a silicon phase including crystalline silicon in the silicon oxide phase. The negative electrode active material satisfies d1/d0?0.9 where an average thickness of the mixture layer is d0, and a maximum thickness of a single particle of the composite particles in a vertical direction, the particle occupying the mixture layer, to a surface of the current collector is d1.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 26, 2015
    Inventors: Yasuyuki HOTTA, Takashi KUBOKI, Tomokazu MORITA, Takayuki FUKASAWA, Kenji ESSAKI, Norikazu OSADA
  • Patent number: 8974958
    Abstract: An electrode for a nonaqueous electrolyte secondary battery of an embodiment includes: a current collector; and an active material layer including an active material and a binder, formed on the current collector, wherein the binder includes at least an olefin based polymer and a fatty acid, and the fatty acid has a melting point of 25° C. or less and a boiling point of 100° C. or more.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: March 10, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Miho Muramatsu, Tomokazu Morita, Takashi Kuboki, Norio Takami
  • Publication number: 20150037681
    Abstract: A negative electrode active material for a nonaqueous electrolyte secondary battery of an embodiment includes a carbonaceous material, a silicon oxide phase in the carbonaceous material, and a silicon phase in the silicon oxide phase. The negative electrode active material has a crack in the carbonaceous material, and the longest side of the crack has a length equal to or greater than ? of the diameter of the negative electrode active material.
    Type: Application
    Filed: September 25, 2014
    Publication date: February 5, 2015
    Inventors: Tomokazu MORITA, Takashi KUBOKI, Takayuki FUKASAWA, Yasuyuki HOTTA, Yasuhiro GOTO, Toshiro HIRAOKA
  • Publication number: 20140295291
    Abstract: A nonaqueous electrolyte air battery has s positive electrode comprises at least a catalyst which activates oxygen, a conductive material and a binder, when a thermal decomposition starting temperature of the binder is T1° C. and a thermal decomposition ending temperature of the binder is T2° C. A signal with any of mass numbers of 81, 100, 132 and 200 is present in pyrolysis mass spectrometry of the binder in a range of T1° C. to T2° C. Where a peak area at T1° C. is X and a peak area at T2° C. is Y, the X and Y satisfy a relation of 2X?Y.
    Type: Application
    Filed: March 13, 2014
    Publication date: October 2, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Asato Kondo, Takashi Kuboki
  • Publication number: 20140295249
    Abstract: An electrode for battery has an electrode mixture containing a binder and an active material particle selected from at least one of a carbonaceous material, a metal particle and a metal oxide particle formed on a current collector. When cutting strength of an interface between the current collector and the electrode mixture is represented by “a” and cutting strength in a horizontal direction within the electrode mixture is represented by “b”, the “a” and “b” satisfy a relation of a/b<1.
    Type: Application
    Filed: March 14, 2014
    Publication date: October 2, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yasuyuki HOTTA, Takashi KUBOKI, Tomokazu MORITA
  • Publication number: 20140295248
    Abstract: An electrode has a current collector and an electrode mixture containing a binder and an active material particle selected from at least one of a carbonaceous material, a metal particle and a metal oxide particle formed on the current collector. When cutting strength of an interface between the current collector and the electrode mixture is represented by “a” and cutting strength in a horizontal direction within the electrode mixture is represented by “b”, the “a” and “b” satisfy a relation of a/b>1.
    Type: Application
    Filed: March 14, 2014
    Publication date: October 2, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yasuyuki HOTTA, Takashi Kuboki, Tomokazu Morita
  • Publication number: 20140295299
    Abstract: A nonaqueous electrolyte air battery has a positive electrode comprises at least a catalyst which activates oxygen, a conductive material and a binder, when a thermal decomposition starting temperature of the binder is T1° C. and a thermal decomposition ending temperature of the binder is T2° C. A signal with any of mass numbers of 81, 100, 132 and 200 is present in pyrolysis mass spectrometry of the binder in a range of T1° C. to T2° C. Where a mass spectrum signal area of T1-100° C. or higher and lower than T1° C. is X, and a mass spectrum signal area from T1° C. to T2° C. is Y, the X and Y satisfy a relation of X?Y.
    Type: Application
    Filed: March 13, 2014
    Publication date: October 2, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Asato KONDO, Takashi KUBOKI
  • Patent number: 8835047
    Abstract: According to one embodiment, a negative electrode active material for a non-aqueous electrolyte secondary battery cell includes a composite. The composite includes a carbonaceous material, a silicon oxide dispersed in the carbonaceous material, and a silicon dispersed in the silicon oxide. A half-value width of a diffraction peak of a Si (220) plane in powder X-ray diffraction measurement of the composite is in a range of 1.5° to 8.0°. A mean size of a silicon oxide phase is in a range of 50 nm to 1,000 nm. A value of (a standard deviation)/(the mean size) is equal to or less than 1.0 where the standard deviation of a size distribution of the silicon oxide phase is defined by (d84%?d16%)/2.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: September 16, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomokazu Morita, Norio Takami, Takashi Kuboki
  • Publication number: 20140199584
    Abstract: An electrode for a nonaqueous electrolyte secondary battery of an embodiment has an active material layer containing an active material and a binder containing fluorine, and a current collector bound to the active material layer. When a thermal decomposition start temperature of the binder is T1° C. and a thermal decomposition end temperature of the binder is T2° C., one or more peaks are present in an ion chromatogram of any mass number selected at least from 81, 100, 132, and 200 in a thermal decomposition gas chromatography mass analysis at the thermal decomposition temperature of (T1+T2)/2° C. When a peak area at T1° C. is X, and a peak area at T2° C. is Y, the X and Y satisfy a relation of 2X?Y.
    Type: Application
    Filed: March 17, 2014
    Publication date: July 17, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Asato KONDO, Takashi KUBOKI
  • Publication number: 20140199593
    Abstract: A negative electrode for a nonaqueous electrolyte secondary battery has a current collector, a negative electrode active material layer containing a negative electrode active material and a binder that binds the negative electrode active material, and an azole compound having an amino group as a functional group at a part of an interface between the negative electrode active material layer and the current collector.
    Type: Application
    Filed: March 14, 2014
    Publication date: July 17, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuyuki HOTTA, Takashi KUBOKI, Tomokazu MORITA
  • Publication number: 20140199579
    Abstract: A negative electrode active material for a nonaqueous electrolyte secondary battery has a carbonaceous substance, a silicon oxide phase in the carbonaceous substance, a silicon phase in the silicon oxide phase, and a zirconia phase in the carbonaceous substance. The negative electrode active material has a diffraction peak at 2?=30±1° in powder X-ray diffraction measurement.
    Type: Application
    Filed: March 17, 2014
    Publication date: July 17, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomokazu MORITA, Takashi KUBOKI, Takayuki FUKASAWA, Yasuyuki HOTTA, Kenji ESSAKI, Norikazu OSADA
  • Publication number: 20140199583
    Abstract: An electrode for a nonaqueous electrolyte secondary battery of an embodiment has an active material layer containing an active material and a binder containing fluorine, and a current collector bound to the active material layer. When a thermal decomposition start temperature of the binder is T1° C. and the thermal decomposition end temperature is T2° C., one or more signals are present for any of the mass number of 81, 100, 132, and 200 in a thermal decomposition mass analysis between thermal decomposition temperatures of T1 and T2. When a signal area of the mass spectrum in the range of T1-100° C. or higher but lower than T1° C. is X, and a signal area of the mass spectrum in the range of T1 or higher but the same or lower than T2° C. is Y, the X and Y satisfy a relation of X?Y.
    Type: Application
    Filed: March 17, 2014
    Publication date: July 17, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Asato KONDO, Takashi KUBOKI
  • Patent number: 8765304
    Abstract: According to one embodiment, a non-aqueous electrolyte battery includes an outer case, a negative electrode, a positive electrode including a current collector and a positive electrode layer formed on surface of the current collector and opposed to the negative electrode layer, and a non-aqueous electrolyte, wherein the positive electrode layer includes a layered lithium nickel cobalt manganese composite oxide and a lithium cobalt composite oxide, the positive electrode layer has a pore volume with a pore diameter of 0.01 to 1.0 ?m, the pore volume being 0.06 to 0.25 mL per 1 g of a weight of the positive electrode layer, and a pore surface area within the pore volume range is 2.4 to 8 m2/g.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: July 1, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshiyuki Isozaki, Hidesato Saruwatari, Yoshinao Tatebayashi, Takashi Kuboki, Norio Takami
  • Publication number: 20140178767
    Abstract: A secondary battery includes a positive electrode, a negative electrode containing a metal compound having a lithium ion absorption potential of 0.2V (vs. Li/Li+) or more, a separator and a nonaqueous electrolyte. The separator is provided between the positive electrode and the negative electrode. The separator comprises cellulose fibers and pores having a specific surface area of 5 to 15 m2/g. The separator has a porosity of 55 to 80%, and a pore diameter distribution having a first peak in a pore diameter range of 0.2 ?m (inclusive) to 2 ?m (exclusive) and a second peak in a pore diameter range of 2 to 30 ?m.
    Type: Application
    Filed: February 27, 2014
    Publication date: June 26, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Norio TAKAMI, Hiroki INAGAKI, Takashi KUBOKI
  • Patent number: 8715859
    Abstract: According to one embodiment, a non-aqueous electrolyte battery includes an outer case, a negative electrode, a positive electrode including a current collector and a positive electrode layer formed on surface of the current collector and opposed to the negative electrode layer, and a non-aqueous electrolyte, wherein the positive electrode layer includes a layered lithium nickel cobalt manganese composite oxide and a lithium cobalt composite oxide, the positive electrode layer has a pore volume with a pore diameter of 0.01 to 1.0 ?m, the pore volume being 0.06 to 0.25 mL per 1 g of a weight of the positive electrode layer, and a pore surface area within the pore volume range is 2.4 to 8 m2/g.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: May 6, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshiyuki Isozaki, Hidesato Saruwatari, Yoshinao Tatebayashi, Takashi Kuboki, Norio Takami
  • Patent number: 8691417
    Abstract: A secondary battery includes a positive electrode, a negative electrode containing a metal compound having a lithium ion absorption potential of 0.2V (vs. Li/Li+) or more, a separator and a nonaqueous electrolyte. The separator is provided between the positive electrode and the negative electrode. The separator comprises cellulose fibers and pores having a specific surface area of 5 to 15 m2/g. The separator has a porosity of 55 to 80%, and a pore diameter distribution having a first peak in a pore diameter range of 0.2 ?m (inclusive) to 2 ?m (exclusive) and a second peak in a pore diameter range of 2 to 30 ?m.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: April 8, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Norio Takami, Hiroki Inagaki, Takashi Kuboki
  • Publication number: 20140024127
    Abstract: The objects of embodiments in the present disclosure are to provide a method capable of recovering two or more amine compounds at the same time from a gas or solution, and also to provide a method capable of analyzing the recovered amines. The amine-recovering method comprises the steps (A) and (B). In the step (A), the gas or solution is brought into contact with a solid adsorbent so that the adsorbent may retain the amines. In the step (B), the amines retained by the adsorbent in the step (A) are eluted out by use of a basic compound-containing organic solvent. The solid adsorbent has a substituent group represented by —SO3M (M is H or an alkali metal).
    Type: Application
    Filed: July 16, 2013
    Publication date: January 23, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hiroko WATANDO, Takashi Kuboki
  • Publication number: 20130337314
    Abstract: There is provided a negative electrode material for non-aqueous electrolyte secondary batteries, the negative electrode material being a silicon oxide represented by the composition formula, SiOx, containing silicon and silicon oxide, in which x satisfies the relation of 0.1?x?0.8; the silicon oxide contains crystalline silicon; among the particles of crystalline silicon having a diameter of 1 nm or greater, the proportion by number of particles having a diameter of 100 nm or less is 90% or greater; and the BET specific surface area of the silicon oxide is larger than 100 m2/g.
    Type: Application
    Filed: February 22, 2013
    Publication date: December 19, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kenji Essaki, Takayuki Fukasawa, Tomokazu Morita, Noikazu Osada, Yasuyuki Hotta, Takashi Kuboki, Toshiro Hiraoka
  • Publication number: 20130330629
    Abstract: According to one embodiment, there is provided a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode including a negative electrode active material layer, and a non-aqueous electrolyte. The negative electrode active material layer contains carbon dioxide and releases the carbon dioxide in the range of 0.1 ml to 5 ml per 1 g when heated at 200° C. for 1 minute.
    Type: Application
    Filed: August 16, 2013
    Publication date: December 12, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinsuke MATSUNO, Hidesato Saruwatari, Dai Yamamoto, Asato Kondo, Hiromichi Kuriyama, Hideki Satake, Takashi Kuboki
  • Publication number: 20130330627
    Abstract: According to one embodiment, there is provided a non-aqueous electrolyte secondary battery including a positive electrode including a positive electrode active material layer, a negative electrode including a negative electrode active material layer, and a non-aqueous electrolyte. At least one of the positive electrode active material layer and the negative electrode active material layer contains carbon dioxide and releases the carbon dioxide in the range of 0.1 ml to 10 ml per 1 g when heated at 350° C. for 1 minute.
    Type: Application
    Filed: August 16, 2013
    Publication date: December 12, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinsuke Matsuno, Hiromichi Kuriyama, Hideki Satake, Takashi Kuboki