Patents by Inventor Yoshiyasu Yamada

Yoshiyasu Yamada 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: 10777841
    Abstract: Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein, for the anode active material particles, a value A obtained by the following formula (1) is 6.1 or more and 54.8 or less: A=SBET×dmed×D??Formula (1) where SBET is a BET specific surface area (m2/g) of the anode active material particles; dmed is a median diameter D50 (?m) of the anode active material particles; and D is a density (g/cm3) of the anode active material particles.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: September 15, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Mitsutoshi Otaki, Norihiro Ose, Shigenori Hama, Kazuyuki Taniguchi, Yoshiyasu Yamada, Tetsuo Nakanishi
  • Publication number: 20190013541
    Abstract: Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein a BET specific surface area of the anode active material particles is 1.9 m2/g or more and 14.2 m2/g or less.
    Type: Application
    Filed: June 13, 2018
    Publication date: January 10, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Mitsutoshi OTAKI, Norihiro OSE, Shigenori HAMA, Kazuyuki TANIGUCHI, Yoshiyasu YAMADA, Tetsuo NAKANISHI
  • Publication number: 20190013542
    Abstract: Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein, for the anode active material particles, a value A obtained by the following formula (1) is 6.1 or more and 54.8 or less: A=SBET×dmed×D??Formula (1) where SBET is a BET specific surface area (m2/g) of the anode active material particles; dmed is a median diameter D50 (?m) of the anode active material particles; and D is a density (g/cm3) of the anode active material particles.
    Type: Application
    Filed: June 21, 2018
    Publication date: January 10, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Mitsutoshi OTAKI, Norihiro OSE, Shigenori HAMA, Kazuyuki TANIGUCHI, Yoshiyasu YAMADA, Tetsuo NAKANISHI
  • Patent number: 10050272
    Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery, wherein the negative electrode active material is represented by an elemental composition formula of Met1-Si—O—C—H (wherein Met1 represents one alkali metal element or a mixture of alkali metal elements), including: a silicate salt made of a silicon-based inorganic compound and the alkali metal, and fine particles composed of silicon, silicon alloy, or silicon oxide being dispersed in the silicate salt; and a negative electrode active material for a non-aqueous electrolyte secondary battery, wherein the negative electrode active material is represented by an elemental composition formula of Met2-Si—O—C—H (wherein Met2 represents one alkaline earth metal element or a mixture of alkaline earth metal elements), including: a silicate salt made of a silicon-based inorganic compound and the alkaline earth metal.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: August 14, 2018
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuo Nakanishi, Kazuyuki Taniguchi, Yoshitaka Aoki, Yoshiyasu Yamada
  • Patent number: 9837658
    Abstract: The present invention is directed to a silicon-containing particle for use as a negative-electrode active material of a non-aqueous electrolyte secondary battery, wherein a crystal grain size is 300 nm or less, the crystal grain size being obtained by a Scherrer method from a full width at half maximum of a diffraction line attributable to Si (111) and near 2?=28.4° in an x-ray diffraction pattern analysis, and a true density is more than 2.320 g/cm3 and less than 3.500 g/cm3. The invention provides silicon-containing particles for use as a negative-electrode active material of a non-aqueous electrolyte secondary battery that enable manufacture of a non-aqueous electrolyte secondary battery having an excellent cycle characteristics and a higher capacity compared with graphite types.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: December 5, 2017
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuo Nakanishi, Kazuyuki Taniguchi, Yoshiyasu Yamada
  • Publication number: 20170301913
    Abstract: The present invention is directed to a silicon-containing particle for use as a negative-electrode active material of a non-aqueous electrolyte secondary battery, wherein a crystal grain size is 300 nm or less, the crystal grain size being obtained by a Scherrer method from a full width at half maximum of a diffraction line attributable to Si (111) and near 2?=28.4° in an x-ray diffraction pattern analysis, and a true density is more than 2.320 g/cm3 and less than 3.500 g/cm3. The invention provides silicon-containing particles for use as a negative-electrode active material of a non-aqueous electrolyte secondary battery that enable manufacture of a non-aqueous electrolyte secondary battery having an excellent cycle characteristics and a higher capacity compared with graphite types.
    Type: Application
    Filed: July 6, 2017
    Publication date: October 19, 2017
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuo NAKANISHI, Kazuyuki TANIGUCHI, Yoshiyasu YAMADA
  • Patent number: 9543578
    Abstract: A method for manufacturing a negative electrode active material for a secondary battery that uses a non-aqueous electrolyte, including the steps of: depositing silicon according to an electron beam vapor-deposition method with metallic silicon as a raw material on a substrate of which temperature is controlled from 800 to 1100° C. at a vapor deposition rate exceeding 1 kg/hr in the range of film thickness of 2 to 30 mm; and pulverizing and classifying the deposited silicon to obtain the negative electrode active material. As a result, there is provided a method for manufacturing a negative electrode active material of silicon particles as an active material useful for a negative electrode of a non-aqueous electrolyte secondary battery that is, while maintaining high initial efficiency and battery capacity of silicon, excellent in the cycle characteristics and has a reduced volume change during charge/discharge.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: January 10, 2017
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuo Nakanishi, Yoshiyasu Yamada, Kazuyuki Taniguchi
  • Publication number: 20160322637
    Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery, wherein the negative electrode active material is represented by an elemental composition formula of Met1-Si—O—C—H (wherein Met1 represents one alkali metal element or a mixture of alkali metal elements), including: a silicate salt made of a silicon-based inorganic compound and the alkali metal, and fine particles composed of silicon, silicon alloy, or silicon oxide being dispersed in the silicate salt; and a negative electrode active material for a non-aqueous electrolyte secondary battery, wherein the negative electrode active material is represented by an elemental composition formula of Met2-Si—O—C—H (wherein Met2 represents one alkaline earth metal element or a mixture of alkaline earth metal elements), including: a silicate salt made of a silicon-based inorganic compound and the alkaline earth metal.
    Type: Application
    Filed: December 2, 2014
    Publication date: November 3, 2016
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuo NAKANISHI, Kazuyuki TANIGUCHI, Yoshitaka AOKI, Yoshiyasu YAMADA
  • Publication number: 20150380726
    Abstract: A silicon-containing particle is provided for use as a negative-electrode active material of a non-aqueous electrolyte secondary battery, wherein a crystal grain size is 300 nm or less, the crystal grain size being obtained by a Scherrer method from a full width at half maximum of a diffraction line attributable to Si and near 2?=28.4° in an x-ray diffraction pattern analysis, and a true density is more than 2.320 g/cm3 and less than 3.500 g/cm3. Silicon-containing particles are provided for use as a negative-electrode active material of a non-aqueous electrolyte secondary battery that enable manufacture of a non-aqueous electrolyte secondary battery having an excellent cycle characteristics and a higher capacity compared with graphite types.
    Type: Application
    Filed: January 7, 2014
    Publication date: December 31, 2015
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuo NAKANISHI, Kazuyuki TANIGUCHI, Yoshiyasu YAMADA
  • Patent number: 9225010
    Abstract: The present invention intends to provide silicon-containing particles that, when used as a negative electrode active material for a nonaqueous electrolyte secondary battery, can form a nonaqueous electrolyte secondary battery that is less in volume change during charge/discharge and has high initial efficiency and excellent cycle characteristics. The present invention provides silicon-containing particles that are used as a negative electrode active material for a nonaqueous electrolyte secondary battery and have a diffraction line with a peak at 2?=28.6° in X-ray diffractometry, a negative electrode material for a nonaqueous electrolyte secondary battery therewith, a nonaqueous electrolyte secondary battery, and a method of manufacturing the silicon-containing particles.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: December 29, 2015
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuo Nakanishi, Yoshiyasu Yamada, Kazuyuki Taniguchi, Motoyuki Yamada
  • Publication number: 20150251915
    Abstract: The present invention manufactures silicon-containing particles for use in a negative electrode active material of a non-aqueous electrolyte secondary battery by obtaining the silicon-containing particles by a deposition method and performing a heat treatment on the silicon-containing particles under a reducing atmosphere at, for example, 400° C. to 1100° C. The silicon-containing particles manufactured by this method have an oxygen content ranging from 0.1 to 1.5 mass %. These silicon-containing particles enable manufacture of a non-aqueous electrolyte secondary battery that has a high initial efficiency and an excellent cycle performance and exhibits a small volume variation upon charging and discharging.
    Type: Application
    Filed: October 3, 2013
    Publication date: September 10, 2015
    Inventors: Tetsuo Nakanishi, Kazuyuki Taniguchi, Yoshiyasu Yamada
  • Patent number: 9022099
    Abstract: A heat transport fluid passage device for a heat transport circuit has a wall defining a passage through which a heat transport fluid flows. The heat transport fluid contains a solvent made of water or an organic substance and fine particles dispersed in the solvent. A hydrophobic membrane is formed on a surface of the wall.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: May 5, 2015
    Assignee: Denso Corporation
    Inventors: Rie Fukuta, Yoshimasa Hijikata, Yoshiyasu Yamada, Shinichi Yatsuzuka, Kenji Takigawa, Tetsuo Toyama
  • Patent number: 8988791
    Abstract: A light collector includes a light guide having a refractive index larger than a refractive index of air and a reflecting surface configured to reflect light output from a conic surface of the light guide back to the light guide. The light guide is made of transparent material through which light passes. The light guide has an entering portion from which light enters and an exiting portion from which the light exits. The light guide has a circular cone shape and has a cross-sectional area that decreases in a direction from the entering portion to the exiting portion.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: March 24, 2015
    Assignees: Denso Corporation, National University Corporation Nagoya University
    Inventors: Yoshiyasu Yamada, Koichi Mori
  • Publication number: 20140038050
    Abstract: The present invention intends to provide silicon-containing particles that, when used as a negative electrode active material for a nonaqueous electrolyte secondary battery, can form a nonaqueous electrolyte secondary battery that is less in volume change during charge/discharge and has high initial efficiency and excellent cycle characteristics. The present invention provides silicon-containing particles that are used as a negative electrode active material for a nonaqueous electrolyte secondary battery and have a diffraction line with a peak at 2?=28.6° in X-ray diffractometry, a negative electrode material for a nonaqueous electrolyte secondary battery therewith, a nonaqueous electrolyte secondary battery, and a method of manufacturing the silicon-containing particles.
    Type: Application
    Filed: June 24, 2013
    Publication date: February 6, 2014
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Tetsuo NAKANISHI, Yoshiyasu YAMADA, Kazuyuki TANIGUCHI, Motoyuki YAMADA
  • Publication number: 20120111549
    Abstract: A heat transport fluid passage device for a heat transport circuit has a wall defining a passage through which a heat transport fluid flows. The heat transport fluid contains a solvent made of water or an organic substance and fine particles dispersed in the solvent. A hydrophobic membrane is formed on a surface of the wall.
    Type: Application
    Filed: November 8, 2011
    Publication date: May 10, 2012
    Applicant: DENSO CORPORATION
    Inventors: Rie Fukuta, Yoshimasa Hijikata, Yoshiyasu Yamada, Shinichi Yatsuzuka, Kenji Takigawa, Tetsuo Toyama
  • Publication number: 20120107679
    Abstract: The present invention is a non-aqueous electrolyte secondary battery including at least a positive electrode, a negative electrode and a non-aqueous electrolyte, the positive and negative electrodes being capable of occluding and emitting lithium ions, wherein the negative electrode is composed of particles each having a structure that silicon nanoparticles are dispersed to silicon oxide, each of the particles is coated with a carbon coating, and the non-aqueous electrolyte includes lithium oxalatoborate in the range of 5 to 10 mass %, as the electrolyte. As a result, there is provided a non-aqueous electrolyte secondary battery having high capacity, superior first charge and discharge efficiency, superior cycle performance, and high safety, while a manufacturing method and structure thereof are not complex.
    Type: Application
    Filed: October 3, 2011
    Publication date: May 3, 2012
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Kazuyuki TANIGUCHI, Satoru MIYAWAKI, Yoshiyasu YAMADA
  • Publication number: 20120075733
    Abstract: A light collector includes a light guide having a refractive index larger than a refractive index of air and a reflecting surface configured to reflect light output from a conic surface of the light guide back to the light guide. The light guide is made of transparent material through which light passes. The light guide has an entering portion from which light enters and an exiting portion from which the light exits. The light guide has a circular cone shape and has a cross-sectional area that decreases in a direction from the entering portion to the exiting portion.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 29, 2012
    Applicants: National University Corporation Nagoya University, DENSO CORPORATION
    Inventors: Yoshiyasu Yamada, Koichi Mori
  • Publication number: 20110308774
    Abstract: An apparatus of a heat transfer circuit in which a heat transfer fluid with small particles circulates includes a container and an agitator. The container is located in a lower position of the apparatus in a vertical direction and defines a chamber where the heat transfer liquid passes when circulating in the heat transfer circuit. The agitator is located in the chamber to agitate the heat transfer fluid.
    Type: Application
    Filed: June 15, 2011
    Publication date: December 22, 2011
    Applicant: DENSO CORPORATION
    Inventors: Rie Fukuta, Yoshimasa Hijikata, Shinichi Yatsuzuka, Yoshiyasu Yamada, Touru Kawaguchi, Yasunori Niiyama, Kentarou Fukuda
  • Publication number: 20110062379
    Abstract: A negative electrode comprising (A) particles having Si dispersed in SiO, and (B) a polyamide-imide resin which contains amide and imide groups in an amide/imide ratio of 25/75 to 99/1 and has a weight average molecular weight of 10,000-200,000 is suited for nonaqueous electrolyte secondary batteries. The electrode exhibits a high 1st cycle charge/discharge efficiency and improved cycle performance while maintaining a high battery capacity and a low volume expansion.
    Type: Application
    Filed: September 13, 2010
    Publication date: March 17, 2011
    Inventors: Satoru MIYAWAKI, Yoshiyasu Yamada, Toshio Ohba, Tadao Ikeda, Kazuhiro Sunouchi
  • Patent number: 5534698
    Abstract: Methods and devices for evaluating solid-state surface properties use infrared absorption of lattice vibration. These methods and devices are characterized by reflection spectrometry by injecting infrared rays from the reverse of the solids, placing a light transmissible solid-state sample in ways that its surface faces the plane reflex mirror on the interaction region formed by reflected infrared rays, or by injecting infrared rays from the rear of a sample or from the front thereof after upright installation of the light transmissible solid-state sample through a slit created across the plane reflex mirror or on the surface of plane reflex mirror. These methods and devices enable simplified and accurate reflection spectrometry of solid-surface properties, featuring an economical system configuration that dispenses with expensive prism, unlike the conventional ATR method.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: July 9, 1996
    Assignees: Research Development Corporation, Nippon Denso Co., Ltd.
    Inventors: Hisayoshi Ohshima, Yoshiyasu Yamada