Patents by Inventor Daisuke SHISHIHARA

Daisuke SHISHIHARA 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: 20220294009
    Abstract: To enhance lithium ion conductivity in an electrode for a power storage device, and at the interface between the electrode and another member. The power storage device electrode includes an oxide-based lithium ion conductive solid electrolyte, an active material, and an ionic liquid.
    Type: Application
    Filed: June 24, 2020
    Publication date: September 15, 2022
    Applicant: NGK Spark Plug Co., LTD.
    Inventors: Manato UCHIDA, Daisuke SHISHIHARA, Hideaki HIKOSAKA, Hiroshi YAMAMOTO, Ayako KONDO, Suguru MIYAMOTO, Hidetoshi MIZUTANI
  • Publication number: 20210384551
    Abstract: An ion conductor exhibiting high lithium ion conductivity in the form of a molded product without firing is provided. The ion conductor contains an ion conductive powder having lithium ion conductivity and an ionic liquid having lithium ion conductivity. The ionic liquid has an average thickness of 5 nm or more.
    Type: Application
    Filed: May 13, 2019
    Publication date: December 9, 2021
    Inventors: Ayako KONDO, Daisuke SHISHIHARA, Yuki TAKEUCHI, Suguru MIYAMOTO, Hideaki HIKOSAKA, Hidetoshi MIZUTANI
  • Patent number: 11011776
    Abstract: [OBJECTS] An object of the present invention is to provide a lithium-ion-conductive ceramic material having a target ion conductivity, while suppressing production cost. Another object is to provide a high-performance lithium battery, while suppressing production cost, by virtue of having the lithium-ion-conductive ceramic material. The lithium-ion-conductive ceramic material contains Li, La, and Zr, as well as at least one of Mg and A (wherein A represents at least one element selected from the group consisting of Ca, Sr, and Ba) and which has a garnet-type crystal structure, wherein the elements contained in the ceramic material satisfy the following mole ratio conditions (1) to (3): (1) 1.33?Li/(La+A)?3; (2) 0<Mg/(La+A)?0.5; and (3) 0<A/(La+A)?0.67, and a lithium battery employing the ceramic material.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: May 18, 2021
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Yuki Takeuchi, Hirofumi Ando, Daisuke Shishihara, Hidetoshi Mizutani
  • Publication number: 20210104776
    Abstract: Provided is an ionic conductor with which adhesion between particles can be enhanced simply by pressure-molding a powder without using sulfide ionic conductors and without performing firing or vapor deposition, and which can exhibit a high lithium ionic conductivity. This ionic conductor contains, in addition to an oxide lithium ionic conductor, a complex hydride.
    Type: Application
    Filed: April 23, 2019
    Publication date: April 8, 2021
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Yuki TAKEUCHI, Manato UCHIDA, Yuta IGA, Daisuke SHISHIHARA, Hideaki HIKOSAKA, Hidetoshi MIZUTANI
  • Publication number: 20210020985
    Abstract: In order to sufficiently improve the lithium ion conductivity of a molded article obtained by pressure-molding an ion conductive powder, this ion conductive powder contains a lithium ion conductive solid electrolyte which is an ionic conductor having the garnet structure or a structure similar to the garnet structure that contains at least Li, Zr, La, and O. In this ion conductive powder, the contained amount of Li2CO3 per gram of the lithium ion conductive solid electrolyte is less than 3 mg as calculated on the basis of the amount of CO2 detected at 500° C. or higher by temperature programmed desorption-mass spectrometry (TPD-MS).
    Type: Application
    Filed: April 25, 2019
    Publication date: January 21, 2021
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Yuki TAKEUCHI, Daisuke SHISHIHARA, Hideaki HIKOSAKA, Hidetoshi MIZUTANI
  • Publication number: 20210020983
    Abstract: Provided is an ionic conductor that, as a molded article that has been press-molded without firing, can exhibit a high lithium ionic conductivity. The ionic conductor comprises an ionic conductive powder that has a garnet structure or garnet-like structure containing at least Li, La, Zr, and O. This ionic conductor further comprises an ionic liquid that exhibits lithium ion conductivity. The ionic conductor has a lithium ion conductivity at 25° C. of at least 1.0×10?5 S/cm.
    Type: Application
    Filed: May 13, 2019
    Publication date: January 21, 2021
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Daisuke SHISHIHARA, Yuki TAKEUCHI, Ayako KONDO, Hideaki HIKOSAKA, Hidetoshi MIZUTANI
  • Publication number: 20180269526
    Abstract: [OBJECTS] An object of the present invention is to provide a lithium-ion-conductive ceramic material having a target ion conductivity, while suppressing production cost. Another object is to provide a high-performance lithium battery, while suppressing production cost, by virtue of having the lithium-ion-conductive ceramic material. [MEANS FOR SOLUTION] The invention provides a lithium-ion-conductive ceramic material which contains Li, La, and Zr, as well as at least one of Mg and A (wherein A represents at least one element selected from the group consisting of Ca, Sr, and Ba) and which has a garnet-type crystal structure, wherein the elements contained in the ceramic material satisfy the following mole ratio conditions (1) to (3): (1) 1.33?Li/(La+A)?3; (2) 0<Mg/(La+A)?0.5; and (3) 0<A/(La+A)?0.67, and a lithium battery employing the ceramic material.
    Type: Application
    Filed: December 29, 2017
    Publication date: September 20, 2018
    Inventors: Yuki TAKEUCHI, Hirofumi ANDO, Daisuke SHISHIHARA, Hidetoshi MIZUTANI