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).

  • Patent number: 9537145
    Abstract: A negative electrode for a nonaqueous electrolyte secondary battery of the embodiment includes a current collector; and an electrode mixture layer that is formed on the current collector and contains a first particle, a second particle and a binder. The first particle is comprised of silicon, a silicon oxide and a carbonaceous material. The second particle has electron conductivity and an oxygen content of 1% or lower. The electrode mixture layer is characterized in that silicon concentrations in the vicinity of the surface having contact with the current collector and the vicinity of the opposite surface to the surface having contact with the current collector are higher than a silicon concentration at the central part in the thickness direction.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: January 3, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Norikazu Osada, Takashi Kuboki, Shinsuke Matsuno
  • Publication number: 20160372744
    Abstract: An active material of an embodiment for a nonaqueous electrolyte battery includes a complex. The complex includes a covering material including an M-O—C mixed body; and particles including at least one element of M. The particles are included in the covering material. The M includes at least one element selected from the group consisting of; Si, Sn, Al, and Ti. The particles including the at least one element of M include the at least one element of M or an alloy including the at least one element of M. The M-O—C mixed body includes at least three elements of M, O, and C. The M-O—C mixed body includes a point at which the following conditional expressions: 0.6?M/O?5 (molar ratio) and 0.002?M/C?0.1 (molar ratio) are simultaneously satisfied. The M-O—C mixed body includes the at least three elements of M, O, and C in a region excluding the particles including the at least one element of M when elementary composition analysis of the complex is performed by TEM-EDX with a beam diameter of 1 nm.
    Type: Application
    Filed: September 2, 2016
    Publication date: December 22, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kenji ESSAKI, Tomokazu MORITA, Takayuki FUKASAWA, Takashi KUBOKI
  • Publication number: 20160372753
    Abstract: A negative electrode active material of an embodiment for a nonaqueous electrolyte battery includes silicon or silicon oxide including silicon inside, a carbonaceous substance containing the silicon or the silicon oxide including silicon inside, and a phase including a silicate compound and a conductive assistant, the phase being interposed between the silicon or the silicon oxide including silicon inside and the carbonaceous substance. The silicate compound is a complexed oxide including an oxide including at least one element selected from the group consisting of; an alkaline earth element, a transition metal element, and a rare-earth element and a silicon oxide.
    Type: Application
    Filed: September 2, 2016
    Publication date: December 22, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Tomokazu MORITA, Takashi KUBOKI
  • Patent number: 9509013
    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: Grant
    Filed: June 29, 2015
    Date of Patent: November 29, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinsuke Matsuno, Hiromichi Kuriyama, Hideki Satake, Takashi Kuboki
  • Patent number: 9496558
    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: Grant
    Filed: March 13, 2014
    Date of Patent: November 15, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Asato Kondo, Takashi Kuboki
  • Publication number: 20160319232
    Abstract: According to one embodiment, a measuring cell includes a main cell member, and a mixture supported by or held in the main cell member. The mixture includes a nonaqueous solvent-including medium and one or more enzyme bodies. The one or more enzyme bodies are selected from the group including an enzyme, a first composite including an enzyme and a molecular aggregate that includes a dispersant, a microcapsule including an enzyme-including core and a shell covering the core, a cell including an enzyme, a microorganism including an enzyme, and a second composite including an enzyme and a support immobilizing the enzyme.
    Type: Application
    Filed: April 27, 2016
    Publication date: November 3, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yasuko NORITOMI, Takashi KUBOKI, Ko YAMADA, Hiroyuki FUKE
  • Publication number: 20160280839
    Abstract: There is provided a method that can realize the treatment of an amine compound, a deterioration product thereof and the like in a simple and a low-cost manner. The method includes treating a carbon dioxide absorbing agent, comprising a step in which at least one carbon dioxide absorbing agent represented by OH—R2—NR3—R4—OH or H—NR6—R7—NR8—H into contact with a compound containing two or more isocyanate groups in its molecule to produce a solid containing a urethane bond or a urea bond. In the above formula, R2, R3, R4, R6, R7, and R8 each independently represent CvHwOxNy wherein v, w, x, and y are 0?v?10, 0?w?22, 0?x?3, and 0?y?3, respectively.
    Type: Application
    Filed: March 14, 2016
    Publication date: September 29, 2016
    Inventors: Hiroko WATANDO, Takashi KUBOKI, Satoshi SAITO
  • Publication number: 20160285081
    Abstract: A negative electrode for a nonaqueous electrolyte secondary battery of the embodiment includes: a negative electrode current collector; and a negative electrode active material layer which includes a negative electrode active material and is formed on the negative electrode current collector. The negative electrode active material layer includes silicon capable of reacting with lithium. The negative electrode active material layer includes a 1st layer containing an oxidized silicon compound and a 2nd layer containing the oxidized silicon compound. The 2nd layer has the smaller amount of the oxidized silicon compound than the 1st layer. The 2nd layer is provided on the surface of the negative electrode current collector.
    Type: Application
    Filed: March 21, 2016
    Publication date: September 29, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shinsuke MATSUNO, Norikazu OSADA, Sara YOSHIO, Takashi KUBOKI
  • Publication number: 20160285082
    Abstract: In one embodiment, an electrode for a nonaqueous electrolyte secondary battery has an electrode mixture layer comprising an active material, a conductive agent, and a binding agent to bind the active material and the conductive agent, and a collector on which the electrode mixture layer is laminated. The active material comprises a composite body comprising at least a carbonaceous material, and a metal dispersed in the carbonaceous material or an oxide of the metal. And the binding agent is a polyvinyl alcohol resin of a saponification degree of 87-99.9 mole %.
    Type: Application
    Filed: March 21, 2016
    Publication date: September 29, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yasuyuki Hotta, Tomokazu Morita, Takashi Kuboki
  • Publication number: 20160285094
    Abstract: In one embodiment, a negative electrode for a nonaqueous electrolyte secondary battery is a negative electrode which is provided with a metal foil collector, and an negative electrode mixture layer formed on a surface of the metal foil collector, containing a negative electrode active material particle having a carbonaceous material and metal or an oxide of the metal dispersed in the carbonaceous material, a conductive agent, and a binding agent, and the negative electrode mixture layer has an average value of a cutting strength of not less than 0.6 kN/m, and a standard deviation of not less than 0.05 kN/m and not more than 0.2 kN/m, when the negative electrode mixture layer is cut at a portion distant from an interface in a prescribed horizontal direction, by a borazon blade with a blade width of 1 mm, at a rake angle ?S of 20 degrees, and a relief angle ?N of 10 degrees, and at a horizontal speed of 2 ?m/sec.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 29, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yumiko KITA, Asato KONDO, Takashi KUBOKI, Shinsuke MATSUNO
  • Publication number: 20160285101
    Abstract: In one embodiment, an electrode for a nonaqueous electrolyte battery is provided with a collector, a first mixture layer formed on the collector, and a second mixture layer formed on a surface of the first mixture layer which is opposite to the collector, and the first mixture layer contains a first binding agent of at least one kind of polyamic acid, polyamide-imide and polyimide, and the second mixture layer contains a second binding agent obtained by polymerizing monomers of at least one kind of acrylic acid, methacrylic acid and acrylonitrile.
    Type: Application
    Filed: March 23, 2016
    Publication date: September 29, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Sara YOSHIO, Takayuki Fukasawa, Miho Muramatsu, Yasuyuki Hotta, Takashi Kuboki
  • Patent number: 9409119
    Abstract: An acid gas absorbent of which recovery amount of acid gas such as carbon dioxide is high, and an acid gas removal device and an acid gas removal method using the acid gas absorbent are provided. The acid gas absorbent of the embodiment comprising at least one type of tertiary amine compound represented by the following general formula (1). (In the above-stated formula (1), either one of the R1, R2 represents a substituted or non-substituted alkyl group of which carbon number is 2 to 5, and the other one represents a substituted or non-substituted alkyl group of which carbon number is 1 to 5. The R3 represents a methyl group or an ethyl group, and the R4 represents a hydroxyalkyl group. The R1, R2 may either be the same or different, and they may be coupled to form a cyclic structure.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: August 9, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji Murai, Yukishige Maezawa, Yasuhiro Kato, Takehiko Muramatsu, Satoshi Saito, Hiroko Watando, Naomi Shida, Reiko Yoshimura, Takashi Kuboki
  • Patent number: 9318737
    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: Grant
    Filed: February 22, 2013
    Date of Patent: April 19, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenji Essaki, Takayuki Fukasawa, Tomokazu Morita, Noikazu Osada, Yasuyuki Hotta, Takashi Kuboki, Toshiro Hiraoka
  • Publication number: 20160087278
    Abstract: A negative electrode material for a nonaqueous electrolyte secondary battery of the embodiment include a granular composite product that includes: an organic resin composition; a metal dispersed in the organic resin composition or a metal and an oxide of the metal dispersed in the organic resin composition; an electroconductive carbonaceous material, wherein an elemental ratio A/B (mass/mass) of carbon (A) and hydrogen (B) is 1 or lower.
    Type: Application
    Filed: September 15, 2015
    Publication date: March 24, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yasuyuki HOTTA, Takashi Kuboki, Tomokazu Morita, Sara Yoshio
  • Patent number: 9172073
    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: February 27, 2014
    Date of Patent: October 27, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Norio Takami, Hiroki Inagaki, Takashi Kuboki
  • Publication number: 20150086862
    Abstract: A nonaqueous electrolyte secondary battery of an embodiment includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The electrolyte contains an organic solvent with a lithium salt dissolved therein and an additive. An active material of the negative electrode contains at least one metal selected from Si and Sn, at least one or more selected from an oxide of the metal and an alloy containing the metal, and a carbonaceous matter. A fluorine concentration of a film A formed on the metal, the oxide of the metal, or the alloy containing the metal in the negative electrode active material is higher than a fluorine concentration of a film B formed on the carbonaceous matter, the additive includes at least one compound containing fluorine and at least one compound containing no fluorine, or an electrolyte after initial charge contains at least one fluorine-containing additive.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 26, 2015
    Inventors: Norikazu OSADA, Shinsuke MATSUNO, Keiko OKAMOTO, Takayuki FUKASAWA, Takashi KUBOKI
  • Publication number: 20150086870
    Abstract: An electrode material for nonaqueous electrolyte secondary battery of an embodiment includes a silicon nanoparticle, and a coating layer coating the silicon nanoparticle. The coating layer includes an amorphous silicon oxide and a silicon carbide phase. At least a part of the silicon carbide phase exists on a surface of the silicon nanoparticle.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 26, 2015
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Tomokazu MORITA, Takashi KUBOKI, Mitsuhiro OKI, Yasuhiro GOTO
  • Publication number: 20150086852
    Abstract: A nonaqueous electrolyte secondary battery of an embodiment includes an exterior member; a positive electrode housed in the exterior member, a negative electrode containing an active material and housed in the exterior member so as to be spatially separated from the positive electrode via a separator, and a nonaqueous electrolyte filled in the exterior member. The negative electrode includes a negative electrode current collector and a negative electrode active material layer on the negative electrode current collector. A tensile strength of the negative electrode is 400 N/mm2 or more and 1200 N/mm2 or less. A peel strength between the negative electrode current collector and the negative electrode active material layer is 1.5 N/cm or more and 4 N/cm or less.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 26, 2015
    Inventors: Shinsuke MATSUNO, Takashi KUBOKI, Keiko OKAMOTO, Norikazu OSADA, Sara YOSHIO
  • Publication number: 20150086854
    Abstract: A nonaqueous electrolyte secondary battery of an embodiment includes an electrode group including a cathode collector, a cathode having a cathode active material layer formed on the cathode collector, an anode collector, an anode having an anode active material layer formed on the anode collector, and a separator placed between the cathode and the anode, an exterior member housing the electrode group, and a nonaqueous electrolyte filled in the exterior member. In the nonaqueous electrolyte secondary battery, the anode collector is at least one metal selected from among Fe, Ti, Ni, Cr, and Al, or an alloy containing at least one metal selected from among Fe, Ti, Ni, Cr, and Al. In the nonaqueous electrolyte secondary battery, a coating containing at least one metal selected from Au and Cu is formed on at least one of the surfaces of the anode collector excluding the anode active material layer.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 26, 2015
    Inventors: Shinsuke MATSUNO, Takashi KUBOKI, Keiko OKAMOTO, Norikazu OSADA, Sara YOSHIO
  • Publication number: 20150086853
    Abstract: A nonaqueous electrolyte secondary battery of an embodiment includes an exterior member, a cathode including a cathode active material layer housed in the exterior member, an anode including an anode active material layer housed in the exterior member and spatially separated from the cathode by a separator, and a nonaqueous electrolyte filled in the exterior member. The cathode active material layer contains lithium-copper oxide and copper oxide. A peak intensity ratio d(002)/d(010) between a plane index d(010) derived from the lithium-copper oxide and a plane index d(002) derived from the copper oxide is not lower than 0.1 and not higher than 0.5 at an X-ray diffraction peak.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 26, 2015
    Inventors: Shinsuke MATSUNO, Norikazu OSADA, Keiko OKAMOTO, Tomokazu MORITA, Takashi KUBOKI