Patents by Inventor Shohei Yokoyama

Shohei Yokoyama 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: 20240222793
    Abstract: There is provided an LDH separator including: a porous substrate; and a surface layer provided on at least one surface of the porous substrate and including a hydroxide ion-conductive layered compound that is a layered double hydroxide (LDH) and/or a layered double hydroxide (LDH)-like compound. The LDH separator has an ionic conductivity of 1.0 mS/cm or more, and an adhesion force of 5.0 mN or more between the surface layer and the porous substrate. The adhesion force is the critical load value measured by subjecting a surface including the surface layer of the LDH separator to a micro-scratch test in accordance with JIS R3255-1997 under the conditions of a scratch rate of 10 ?m/s, a tip curvature radius of a diamond indenter needle of 25 ?m, a load application rate of 30 mN/min, an excitation amplitude of 50 ?m, and an excitation frequency of 45 Hz.
    Type: Application
    Filed: March 14, 2024
    Publication date: July 4, 2024
    Inventors: Shumpei ONO, Naoko INUKAI, Shohei YOKOYAMA
  • Patent number: 11850837
    Abstract: There is provided a functional layer including layered double hydroxide. The functional has an average porosity of 1 to 40% and an average pore diameter of 100 nm or less.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: December 26, 2023
    Assignee: NGK INSULATORS, LTD.
    Inventors: Sho Yamamoto, Megumi Fujisaki, Shohei Yokoyama
  • Publication number: 20230322613
    Abstract: To provide a glass article suitable for a top plate for a cooker, in which a color tone of a colored layer is not impaired. A glass article is characterized by including a Li2O—Al2O3—SiO2-based crystallized glass sheet having lightness L* of 70 or greater, chromaticity a* of within ±5, and chromaticity b* of within ±5 at a thickness of 3 mm, and a colored layer formed on a back surface of the glass sheet.
    Type: Application
    Filed: September 6, 2021
    Publication date: October 12, 2023
    Inventors: Yuki YOKOTA, Takahiro MATANO, Shohei YOKOYAMA, Tsukasa MATSUBARA
  • Publication number: 20230231153
    Abstract: Provided is an LDH-like compound separator including a porous substrate made of a polymeric material and an LDH-like compound plugging pores in the porous substrate. The LDH-like compound separator has a plurality of remaining flattened pores, longitudinal directions of the pores being non-parallel to a thickness direction of the LDH-like compound separator.
    Type: Application
    Filed: March 8, 2023
    Publication date: July 20, 2023
    Applicant: NGK INSULATORS, LTD.
    Inventors: Sota OKOCHI, Shohei YOKOYAMA, Sho YAMAMOTO, Naoko INUKAI
  • Publication number: 20230231154
    Abstract: Provided is an LDH-like compound separator including a porous substrate made of a polymeric material; and a layered double hydroxide (LDH)-like compound with which pores of the porous substrate are plugged. A central region along the thickness of the LDH-like compound separator has a lower mean porosity than peripheral regions along the thickness of the LDH-like compound separator.
    Type: Application
    Filed: March 8, 2023
    Publication date: July 20, 2023
    Applicant: NGK INSULATORS, LTD.
    Inventors: Sota OKOCHI, Shohei YOKOYAMA, Sho YAMAMOTO, Naoko INUKAI
  • Publication number: 20230207888
    Abstract: Provided is a battery including a positive electrode; a negative electrode; an electrolytic solution being an aqueous alkali metal hydroxide solution; and a layered double hydroxide (LDH)-like compound provided so as to be in contact with the electrolytic solution. A metal compound containing at least one metal element constituting the LDH-like compound is dissolved in the electrolytic solution such that erosion of the LDH-like compound by the electrolytic solution is suppressed.
    Type: Application
    Filed: February 28, 2023
    Publication date: June 29, 2023
    Applicant: NGK INSULATORS, LTD.
    Inventors: Shohei YOKOYAMA, Sho YAMAMOTO, Naohito YAMADA, Naoko INUKAI
  • Publication number: 20230207796
    Abstract: There is provided a secondary zinc battery including: a unit cell including; a positive-electrode plate including a positive-electrode active material layer and a positive-electrode collector; a negative-electrode plate including a negative-electrode active material layer containing zinc and a negative-electrode collector; an LDH separator covering or wrapping around the entire negative-electrode active material layer; and an electrolytic solution. The positive-electrode collector has a positive-electrode collector tab extending from one edge of the positive-electrode active material layer, and the negative-electrode collector has a negative-electrode collector tab extending from the opposite edge of the negative-electrode active material layer and beyond a vertical edge of the LDH-like compound separator. The unit cell can thereby collects electricity from the positive-electrode collector tab and the negative-electrode collector tab that are disposed at opposite edges of the unit cell.
    Type: Application
    Filed: March 2, 2023
    Publication date: June 29, 2023
    Applicant: NGK INSULATORS, LTD.
    Inventors: Junki MATSUYA, Yuichi GONDA, Takeshi YAGI, Kenshin KITOH, Shohei YOKOYAMA, Naoko INUKAI, Sho YAMAMOTO
  • Publication number: 20230207965
    Abstract: Provided is an LDH-like compound separator for secondary zinc batteries that includes a porous substrate made of a polymer material; and an LDH-like compound plugging pores in the porous substrate. The LDH-like compound separator has a dendrite buffer layer therein, the dendrite buffer layer being at least one selected from the group consisting of: (i) a pore-rich internal porous layer in the porous substrate, the internal porous layer being free from the LDH-like compound or deficient in the LDH-like compound; (ii) a releasable interfacial layer, which is provided by two adjacent layers constituting part of the LDH-like compound separator being in releasable contact with each other; and (iii) an internal gap layer being free from the LDH-like compound and the porous substrate, which is provided by two adjacent layers constituting part of the LDH-like compound separator being formed apart from each other.
    Type: Application
    Filed: February 10, 2023
    Publication date: June 29, 2023
    Applicant: NGK INSULATORS, LTD.
    Inventors: Sota OKOCHI, Shohei YOKOYAMA, Naoko INUKAI, Sho YAMAMOTO
  • Publication number: 20230198095
    Abstract: Provided is an LDH-like compound separator that includes a porous substrate made of a polymer material and a layered double hydroxide (LDH)-like compound plugging pores in the porous substrate, and has a linear transmittance of 1% or more at a wavelength of 1000 nm.
    Type: Application
    Filed: February 10, 2023
    Publication date: June 22, 2023
    Applicant: NGK INSULATORS, LTD.
    Inventors: Sota OKOCHI, Shohei YOKOYAMA, Naoko INUKAI, Sho YAMAMOTO
  • Publication number: 20230135365
    Abstract: There is provided an LDH separator including a porous substrate and a hydroxide ion-conductive layered compound that is a layered double hydroxide (LDH) and/or a layered double hydroxide (LDH)-like compound, filling up pores of the porous substrate. The proportion of the hydroxide ion-conductive layered compound in the LDH separator is 25 to 85% by weight.
    Type: Application
    Filed: December 27, 2022
    Publication date: May 4, 2023
    Applicant: NGK INSULATORS, LTD.
    Inventors: Shumpei ONO, Sho YAMAMOTO, Naoko INUKAI, Shohei YOKOYAMA
  • Publication number: 20230069319
    Abstract: Provided is an LDH separator including a porous substrate and a mixture of a layered double hydroxide (LDH)-like compound and In(OH)3, which fills up pores of the porous substrate. The LDH-like compound is a hydroxide and/or an oxide with a layered crystal structure containing Mg, Ti, Y, and optionally Al and/or In.
    Type: Application
    Filed: October 19, 2022
    Publication date: March 2, 2023
    Applicant: NGK INSULATORS, LTD.
    Inventors: Sho YAMAMOTO, Naoko INUKAI, Shohei YOKOYAMA
  • Publication number: 20230045074
    Abstract: There is provided an LDH separator including a porous substrate and a layered double hydroxide (LDH)-like compound that fills up pores of the porous substrate. The LDH-like compound is a hydroxide and/or an oxide with a layered crystal structure, containing (i) Ti, Y, and optionally Al and/or Mg, and (ii) at least one additive element M selected from the group consisting of In, Bi, Ca, Sr, and Ba.
    Type: Application
    Filed: September 30, 2022
    Publication date: February 9, 2023
    Applicant: NGK INSULATORS, LTD.
    Inventors: Sho YAMAMOTO, Naoko INUKAI, Shohei YOKOYAMA
  • Patent number: 11545719
    Abstract: Provided is a layered double hydroxide (LDH) separator capable of more effectively restraining short circuiting caused by zinc dendrites. The LDH separator includes a porous substrate made of a polymer material and LDH plugging pores in the porous substrate, and has a linear transmittance of 1% or more at a wavelength of 1000 nm.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: January 3, 2023
    Assignee: NGK INSULATORS, LTD.
    Inventors: Sota Okochi, Shohei Yokoyama
  • Patent number: 11532855
    Abstract: Provided is a layered double hydroxide (LDH) separator including a porous substrate made of a polymeric material; and a hydroxide-ion conductive layered compound being a LDH and/or a LDH-like compound with which pores of the porous substrate are plugged. The LDH separator has a mean porosity of 0.03% to less than 1.0%.
    Type: Grant
    Filed: August 25, 2021
    Date of Patent: December 20, 2022
    Assignee: NGK Insulators, LTD.
    Inventors: Sota Okochi, Shohei Yokoyama, Naoko Inukai, Sho Yamamoto
  • Patent number: 11431034
    Abstract: Provided is a hydroxide ion-conductive separator including a porous substrate and a layered double hydroxide (LDH)-like compound filling pores of the porous substrate, wherein the LDH-like compound is a hydroxide and/or an oxide with a layered crystal structure, containing: Mg; and one or more elements, which include at least Ti, selected from the group consisting of Ti, Y, and Al.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: August 30, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Sho Yamamoto, Naoko Inukai, Shohei Yokoyama
  • Patent number: 11335973
    Abstract: A layered double hydroxide (LDH) separator capable of more effectively restraining short circuiting caused by zinc dendrites. The LDH separator for secondary zinc batteries includes a porous substrate made of a polymer material and a LDH plugging pores in the porous substrate. The LDH separator has a dendrite buffer layer therein, the dendrite buffer layer being at least one selected from the group consisting of: (i) a pore-rich internal porous layer in the porous substrate, the internal porous layer being free from the LDH or deficient in the LDH; (ii) a releasable interfacial layer; which is provided by two adjacent layers constituting part of the LDH separator in releasable contact with each other; and (iii) an internal gap layer free from the LDH and the porous substrate, which is provided by two adjacent layers constituting part of the LDH separator formed apart from each other.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: May 17, 2022
    Inventors: Sota Okochi, Shohei Yokoyama
  • Patent number: 11211672
    Abstract: Provided is an LDH separator including a porous substrate and a layered double hydroxide (LDH) that fills up pores of the porous substrate. The LDH is composed of a plurality of hydroxide base layers containing Mg, Al, Ti, and OH group; and interlayers which are interposed between the plurality of hydroxide base layers and composed of anions and H2O.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: December 28, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Sho Yamamoto, Naoko Inukai, Shohei Yokoyama
  • Publication number: 20210384588
    Abstract: Provided is a layered double hydroxide (LDH) separator including a porous substrate made of a polymeric material; and a hydroxide-ion conductive layered compound being a LDH and/or a LDH-like compound with which pores of the porous substrate are plugged. The LDH separator has a mean porosity of 0.03% to less than 1.0%.
    Type: Application
    Filed: August 25, 2021
    Publication date: December 9, 2021
    Applicant: NGK INSULATORS, LTD.
    Inventors: Sota OKOCHI, Shohei YOKOYAMA, Naoko INUKAI, Sho YAMAMOTO
  • Patent number: 11158906
    Abstract: Provided is a layered double hydroxide (LDH) separator comprising a porous substrate made of a polymeric material; and a LDH with which pores of the porous substrate are plugged. A central region along the thickness of the LDH separator has a lower mean porosity than peripheral regions along the thickness of the LDH separator.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: October 26, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Naohito Yamada, Sota Okochi, Shohei Yokoyama, Naoko Inukai
  • Patent number: 11145935
    Abstract: Provided is a layered double hydroxide (LDH) separator including a porous substrate made of a polymeric material; and a LDH with which pores of the porous substrate are plugged. The LDH separator has a mean porosity of 0.03% to less than 1.0%.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: October 12, 2021
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Naohito Yamada, Sota Okochi, Shohei Yokoyama, Naoko Inukai