Patents by Inventor Takakazu Hirose

Takakazu Hirose 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: 10566607
    Abstract: A negative electrode active material including: a particle of negative electrode active material containing silicon-based material of SiOx (0.5?x?1.6); wherein the intensity A of a peak in a Si-region given in the chemical shift region of from ?50 to ?95 ppm and the intensity B of a peak in a SiO2-region given in the chemical shift region of from ?96 to ?150 ppm in a 29Si-MAS-NMR spectrum of the silicon-based material satisfy a relationship that A/B?0.8. This provides a negative electrode active material which can increase a battery capacity, and can improve cycle characteristics and initial charge/discharge characteristics when used as a negative electrode active material for a lithium ion secondary battery.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: February 18, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takakazu Hirose, Hiromichi Kamo, Hiroki Yoshikawa
  • Patent number: 10559822
    Abstract: A negative electrode active material, wherein the negative electrode active material is a negative electrode active material including negative electrode active material particles; the negative electrode active material particles include silicon compound particles including a silicon compound (SiOx: 0.5?x?1.6); the silicon compound particles include at least any one kind or more kinds of Li2SiO3 and Li4SiO4; the negative electrode active material particles have a loose bulk density BD of 0.5 g/cm3 or more and 0.9 g/cm3 or less, a tapped bulk density TD of 0.7 g/cm3 or more and 1.2 g/cm3 or less, and a compression degree of 25% or less, the compression degree being defined by (TD?BD)/TD. Therefore, the negative electrode active material which is capable of improving the initial charge and discharge characteristics as well as the cycle characteristics upon using it as the negative electrode active material of a secondary battery is provided.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: February 11, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takumi Matsuno, Takakazu Hirose, Hiromichi Kamo, Masahiro Furuya, Hidekazu Awano
  • Patent number: 10559812
    Abstract: A negative electrode active material for nonaqueous electrolyte secondary batteries including: a particle of negative electrode active material, wherein the particle of negative electrode active material contains a particle of silicon compound containing a silicon compound (SiOx:0.5?x?1.6), on at least a part of a surface of the silicon compound a carbon coating film being formed, and the negative electrode active material contains 2% by mass or less of particle of silicon dioxide and the negative electrode active material contains a silicon dioxide-carbon composite secondary particle containing a plurality of the particles of silicon dioxide and carbon. As a result, the negative electrode active material for nonaqueous electrolyte secondary batteries capable of increasing battery capacity and improving the cycle characteristics and battery initial efficiency is provided.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: February 11, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takumi Matsuno, Takakazu Hirose, Kohta Takahashi, Masahiro Furuya
  • Patent number: 10553855
    Abstract: A secondary battery capable of improving the cycle characteristics and the initial charge and discharge characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode has an anode active material layer on an anode current collector. The anode active material layer contains a crystalline anode active material having silicon as an element, and is linked to the anode current collector.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: February 4, 2020
    Assignee: MURATA MANUFACTURING CO., LTD
    Inventors: Takakazu Hirose, Kenichi Kawase, Kazunori Noguchi, Takayuki Fujii, Rikako Imoto
  • Publication number: 20200028152
    Abstract: A negative electrode active material contains a negative electrode active material particle which includes a silicon compound particle containing a silicon compound that contains oxygen. The silicon compound particle contains a Li compound, and at least part of Si constituting the silicon compound particle is present in at least one state selected from oxide of Si2+ to Si3+ containing no Li, and compound containing Li and Si2+ to Si3+. A negative electrode active material is capable of increasing battery capacity and improving cycle characteristics and initial charge-discharge characteristics when the negative electrode active material is used for a secondary battery. A mixed negative electrode active material contains the negative electrode active material. A method produces a negative electrode active material particle which enables production of the negative electrode active material particle to be contained in the negative electrode active material as described above.
    Type: Application
    Filed: May 18, 2018
    Publication date: January 23, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takakazu HIROSE, Takumi MATSUNO, Reiko SAKAI, Kohta TAKAHASHI, Hidekazu AWANO
  • Patent number: 10535872
    Abstract: A negative electrode active material that includes negative electrode active material particles that contain a silicon compound that contains a Li compound. The silicon compound is at least partially coated with a carbon coating, and the negative electrode active material particles are coated with a coating composed of at least one of a compound having a boron-fluorine bond and a compound having a phosphorous-fluorine bond on at least a part of the surface of either or both of the silicon compound and the carbon coating. The negative electrode active material particles contain a boron or a phosphorous element in a range of 10 to 10000 ppm by mass with respect to the total amount of negative electrode active material particles. These features can provide for a negative electrode active material that can increase battery capacity and improve cycle performance in a non-aqueous electrolyte secondary battery.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: January 14, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takumi Matsuno, Hiromichi Kamo, Takakazu Hirose, Hiroki Yoshikawa
  • Patent number: 10529984
    Abstract: The present invention is a negative electrode material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx where 0.5?x?1.6, the silicon compound being coated with a carbon coating layer composed of a carbon component, wherein the negative electrode active material particles contain a SiO2 component having a tridymite structure and exhibit a diffraction peak around 21.825° with a half width (2?) of 0.15° or less in X-ray diffraction. This negative electrode material for a non-aqueous electrolyte secondary battery can increase the battery capacity and improve the cycle performance and the initial charge and discharge performance.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: January 7, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Kohta Takahashi, Takakazu Hirose, Masahiro Furuya, Hiromichi Kamo, Hiroki Yoshikawa
  • Publication number: 20190355973
    Abstract: A negative electrode active material containing a negative electrode active material particle which includes a silicon compound particle containing a silicon compound (SiOx: 0.5?x?1.6). The silicon compound particle has three or more peaks in a chemical shift value ranging from ?40 ppm to ?120 ppm but has no peak in a chemical shift value within a range of ?65±3 ppm in a spectrum obtained from 29Si-MAS-NMR of the silicon compound particle. This provides a negative electrode active material capable of improving cycle characteristics when it is used as a negative electrode active material for a secondary battery.
    Type: Application
    Filed: January 19, 2018
    Publication date: November 21, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takakazu HIROSE, Kohta TAKAHASHI, Takumi MATSUNO, Reiko SAKAI, Yusuke OSAWA
  • Patent number: 10476070
    Abstract: A battery capable of improving the cycle characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The anode includes an anode active material layer containing an anode active material having silicon as an element, and a coating layer that coats the anode active material layer, and contains an oxide of a 3d transition metal element at least one selected from the group consisting of iron, cobalt, and nickel.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: November 12, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takakazu Hirose, Masayuki Iwama, Kenichi Kawase
  • Publication number: 20190341602
    Abstract: A negative electrode material containing a negative electrode active material particle which includes a silicon compound particle containing a silicon compound (SiOx: 0.5?x?1.6). The silicon compound particle contains at least one or more of Li2SiO3 and Li4SiO4, and the negative electrode material further contains at least one of a metal compound particle containing a metal compound and an aggregate of the metal compound particle. The negative electrode material is capable of stabilizing a slurry prepared in production of a negative electrode for a secondary battery, and improving initial charge-discharge characteristics and cycle characteristics when it is used as a negative electrode active material for a secondary battery.
    Type: Application
    Filed: February 26, 2018
    Publication date: November 7, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takumi MATSUNO, Takakazu HIROSE, Kohta TAKAHASHI
  • Publication number: 20190334167
    Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery contains negative electrode active material particles containing a silicon compound expressed by SiOx, where 0.5?x?1.6, and a coating layer composed of an organic polymer coating the silicon compound, the silicon compound containing a lithium compound on its surface or inside. As a result, a negative electrode material for a non-aqueous electrolyte secondary battery can increase the battery capacity and improve the cycle performance and battery initial efficiency.
    Type: Application
    Filed: July 5, 2019
    Publication date: October 31, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiromichi KAMO, Takakazu HIROSE, Hiroki YOSHIKAWA
  • Patent number: 10446837
    Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx where 0.5?x?1.6, the negative electrode active material particles at least partially coated with a carbon coating, the carbon coating exhibiting a specific surface area ranging from 5 m2/g to 1000 m2/g, the specific surface area being measured by a multipoint BET method after the carbon coating is separated from the negative electrode active material particles, the carbon coating exhibiting a compression resistivity ranging from 1.0×10?3 ?·cm to 1.0 ?·cm when the carbon coating is compressed so as to have a density of 1.0 g/cm3, the compression resistivity being measured after the carbon coating is separated from the negative electrode active material particles. This negative electrode active material can increase the battery capacity and improve the cycle performance and battery initial efficiency.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: October 15, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiromichi Kamo, Kenta Fujisaki, Takumi Matsuno, Takakazu Hirose, Hiroki Yoshikawa
  • Patent number: 10418627
    Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery, includes: negative electrode active material particles that contain a silicon compound (SiOx: 0.5?x?1.6) containing a Li compound, wherein the silicon compound is at least partially coated with a carbon coating, and at least a part of a surface of the silicon compound, a surface of the carbon coating, or both of them are coated with a composite layer that contains a composite composed of amorphous metal oxide and metal hydroxide. This provides a negative electrode active material for a non-aqueous electrolyte secondary battery that is highly stable in aqueous slurry, having a high capacity, favorable cycle performance and first efficiency.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: September 17, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takakazu Hirose, Hiromichi Kamo
  • Patent number: 10396351
    Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery contains negative electrode active material particles containing a silicon compound expressed by SiOx, where 0.5?x?1.6, and a coating layer composed of an organic polymer coating the silicon compound, the silicon compound containing a lithium compound on its surface or inside.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: August 27, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiromichi Kamo, Takakazu Hirose, Hiroki Yoshikawa
  • Patent number: 10396348
    Abstract: The present invention is directed to a negative electrode material for a non-aqueous electrolyte secondary battery, including a conductive powder composed of silicon-based active material particles coated with a conductive carbon film, in which the conductive carbon film exhibits a d-band having a peak half width of 100 cm?1 or more as determined from a Raman spectrum of the conductive carbon film. The invention provides a negative electrode material for a non-aqueous electrolyte secondary battery that has excellent cycle performance and keeps high charge and discharge capacity due to use of a silicon-based active material, a method of producing the negative electrode material for a non-aqueous electrolyte secondary battery, and a non-aqueous electrolyte secondary battery.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: August 27, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Masahiro Furuya, Kohta Takahashi, Hiroki Yoshikawa, Hiromichi Kamo, Takakazu Hirose
  • Patent number: 10396353
    Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound (SiOx where 0.5?x?1.6), the negative electrode active material particles being coated with a carbon coating composed of a substance at least partially containing carbon, the carbon coating having a density ranging from 1.2 g/cm3 to 1.9 g/cm3, the negative electrode active material particles having a characteristic of type II or type III adsorption-desorption isotherm in the IUPAC classification, as obtained by adsorption-desorption isotherm measurement with nitrogen gas. This negative electrode active material can increase the battery capacity and improve the cycle performance and battery initial efficiency.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: August 27, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiromichi Kamo, Kohta Takahashi, Takakazu Hirose, Koichiro Watanabe, Masahiro Furuya, Hiroki Yoshikawa
  • Patent number: 10388950
    Abstract: A negative electrode active material for a negative electrode material of a non-aqueous electrolyte secondary battery, includes a silicon-based material expressed by SiOx where 0.5?x?1.6 and either or both of a crystalized fluorine compound and a compound containing —CF2—CF2— units in at least a part of a surface layer of the negative electrode active material, the silicon-based material containing at least one of Li6Si2O7, Li2Si3O5, and Li4SiO4. There can be provided a negative electrode active material that can increase the battery capacity and improve the cycle performance and initial charge and discharge performance when used for a lithium-ion secondary battery, as well as a lithium-ion secondary battery having a negative electrode using this negative electrode active material.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: August 20, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takakazu Hirose, Hiromichi Kamo, Hiroki Yoshikawa
  • Publication number: 20190237760
    Abstract: A negative electrode active material containing a negative electrode active material particle; the negative electrode active material particle including a silicon compound shown by SiO, (0.5×1.6), and having a peak in a range of 539 to 541 eV in a XANES spectrum obtained by XANES measurement of the negative electrode active material particle. This provides a negative electrode active material that is capable of increasing battery capacity and improving cycle performance when it is used as a negative electrode active material for a secondary battery.
    Type: Application
    Filed: August 23, 2017
    Publication date: August 1, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takakazu HIROSE, Reiko SAKAI
  • Publication number: 20190229332
    Abstract: A negative electrode active material contains a negative electrode active material particle; the negative electrode active material particle including a silicon compound particle containing a silicon compound (SiOx: 0.5?x?1.6), wherein the silicon compound particle contains a Li compound, and the negative electrode active material particle contains at least one kind of salt selected from salts of polyacrylic acid and salts of carboxymethyl cellulose, together with a metal salt containing at least one kind of metal selected from Mg and Al. This provides a negative electrode active material that is capable of stabilizing slurry that is produced in production of a negative electrode for a secondary battery, and improving initial charge-discharge characteristics and cycle performance when it is used as a negative electrode active material for a secondary battery.
    Type: Application
    Filed: August 23, 2017
    Publication date: July 25, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takakazu HIROSE, Kohta TAKAHASHI, Takumi MATSUNO, Reiko SAKAI
  • Publication number: 20190221836
    Abstract: A negative electrode active material containing a negative electrode active material particle; the negative electrode active material particle including a silicon compound particle containing a silicon compound (SiOx: 0.5?x?1.6), wherein the silicon compound particle contains a Li compound, and the negative electrode active material particle contains an Al element and an Na element as constituent elements, with a mass ratio MNa/MAl of the Al element and the Na element satisfying the following Formula 1. This provides a negative electrode active material that is capable of stabilizing slurry that is produced in production of a negative electrode for a secondary battery, and improving initial charge-discharge characteristics and cycle performance when it is used as a negative electrode active material for a secondary battery. 0.
    Type: Application
    Filed: August 16, 2017
    Publication date: July 18, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takakazu HIROSE, Kohta TAKAHASHI, Takumi MATSUNO, Reiko SAKAI