Patents by Inventor Takashi Eguro

Takashi Eguro 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).

  • Method of manufacturing a multicomponent system lithium phosphate compound particle having an olivine structure
    Patent number: 9337488
    Abstract: A method of manufacturing a multicomponent lithium phosphate compound particle with an olivine structure of formula LiyM11-ZM2ZPO4, M1 is Fe, Mn or Co; Y satisfies 0.9?Y?1.2; M2 is Mn, Co, Mg, Ti or Al; and Z satisfies 0<Z?0.1, in which the M2 concentration is continuously lowered from a surface of the particle to a core portion of the particle. The method includes mixing a lithium M1 phosphate compound with an olivine structure of formula LiXM1PO4, M1 is Fe, Mn or Co, and X satisfies 0.9?X?1.2, and a precursor of a lithium M2 phosphate compound with an olivine structure of formula LiXM2PO4, M2 is Mn, Co, Mg, Ti or Al, and X satisfies 0.9?X?1.2, to form a mixture; and subjecting the mixture to heating in an inert atmosphere or a vacuum.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: May 10, 2016
    Assignees: THE FURUKAWA BATTERY CO., LTD., TOKYO METROPOLITAN UNIVERSITY, SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Hidetoshi Abe, Tomonori Suzuki, Takashi Eguro, Kiyoshi Kanamura, Mitsumasa Saito
  • METHOD OF MANUFACTURING A MULTICOMPONENT SYSTEM LITHIUM PHOSPHATE COMPOUND PARTICLE HAVING AN OLIVINE STRUCTURE
    Publication number: 20140353555
    Abstract: A method of manufacturing a multicomponent lithium phosphate compound particle with an olivine structure of formula LiyM11-ZM2ZPO4, M1 is Fe, Mn or Co; Y satisfies 0.9?Y?1.2; M2 is Mn, Co, Mg, Ti or Al; and Z satisfies 0<Z?0.1, in which the M2 concentration is continuously lowered from a surface of the particle to a core portion of the particle. The method includes mixing a lithium M1 phosphate compound with an olivine structure of formula LiXM1PO4, M1 is Fe, Mn or Co, and X satisfies 0.9?X?1.2, and a precursor of a lithium M2 phosphate compound with an olivine structure of formula LiXM2PO4, M2 is Mn, Co, Mg, Ti or Al, and X satisfies 0.9?X?1.2, to form a mixture; and subjecting the mixture to heating in an inert atmosphere or a vacuum.
    Type: Application
    Filed: August 14, 2014
    Publication date: December 4, 2014
    Applicants: THE FURUKAWA BATTERY CO., LTD., SUMITOMO OSAKA CEMENT CO., LTD., TOKYO METROPOLITAN UNIVERSITY
    Inventors: Hidetoshi ABE, Tomonori SUZUKI, Takashi EGURO, Kiyoshi KANAMURA, Mitsumasa SAITO
  • Multi-component-system lithium phosphate compound particle having an olivine structure and lithium secondary battery employing the lithium phosphate compound particle as a positive electrode material
    Patent number: 8841023
    Abstract: There is disclosed a multi-component system lithium phosphate compound particles having an olivine structure and represented by a general formula of LiYM11-ZM2ZPO4 in which M1 is one metal element selected from the group consisting of Fe, Mn and Co, Y is a number satisfying a formula of 0.9?Y?1.2, M2 is at least one metal element selected from the group consisting of Mn, Co, Mg, Ti and Al, and Z is an number satisfying a formula of 0<Z?0.1, wherein a concentration of the metal element M2 existing on a surface of the particle is higher than the concentration of that existing in core portion of the particle and that the concentration of the metal element M2 is continuously lowered from the surface of particle to a core portion of the particle.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: September 23, 2014
    Assignees: The Furukawa Battery Co., Ltd., Tokyo Metropolitan University, Sumitomo Osaka Cement Co., Ltd.
    Inventors: Hidetoshi Abe, Tomonori Suzuki, Takashi Eguro, Kiyoshi Kanamura, Mitsumasa Saito
  • MULTI-COMPONENT-SYSTEM LITHIUM PHOSPHATE COMPOUND PARTICLES HAVING AN OLIVINE STRUCTURE, MANUFACTURING METHOD THEREOF AND LITHIUM SECONDARY BATTERY EMPLOYING THE LITHIUM PHOSPHATE COMPOUND PARTICLES AS A POSITIVE ELECTRODE MATERIAL
    Publication number: 20110195304
    Abstract: There is disclosed a multi-component system lithium phosphate compound particles having an olivine structure and represented by a general formula of LiYM11-ZM2ZPO4 in which M1 is one metal element selected from the group consisting of Fe, Mn and Co, Y is a number satisfying a formula of 0.9?Y?1.2, M2 is at least one metal element selected from the group consisting of Mn, Co, Mg, Ti and Al, and Z is an number satisfying a formula of 0<Z?0.1, wherein a concentration of the metal element M2 existing on a surface of the particle is higher than the concentration of that existing in core portion of the particle and that the concentration of the metal element M2 is continuously lowered from the surface of particle to a core portion of the particle.
    Type: Application
    Filed: April 20, 2011
    Publication date: August 11, 2011
    Applicants: THE FURUKAWA BATTERY CO., LTD., TOKYO METROPOLITAN UNIVERSITY, SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Hidetoshi ABE, Tomonori Suzuki, Takashi Eguro, Kiyoshi Kanamura, Mitsumasa Saito