Patents by Inventor Tsutomu NISHIZAKI

Tsutomu NISHIZAKI 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: 10361452
    Abstract: A garnet-type oxide sintered body according to the present invention includes crystal grains composed of a garnet-type oxide containing Li, La and Zr and a grain boundary composition containing boron and silicon and filling gaps between the crystal grains. The oxide sintered body has the characteristics of high density and high ion conductivity. A production method of the sintered body includes a step of providing a precursor material by mixing a garnet-type oxide powder containing Li, La and Zr with a sintering aid; a step of forming the precursor material into a formed body; and a sintering step of sintering the formed body. The sintering aid contains oxygen, boron, silicon and lithium. The oxygen and boron, or the oxygen and silicon, contained in the sintered aid form a compound.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: July 23, 2019
    Assignee: Central Glass Company, Limited
    Inventors: Tsutomu Nishizaki, Ryota Esaki, Tetsuya Tamura
  • Publication number: 20180219224
    Abstract: Provided is a sintered body which is a composite of an electrode active material and an oxide-based solid electrolyte. The sintered body used is characterized by containing lithium titanate having the spinel crystal structure and/or lithium titanate having the ramsdellite crystal structure, and lithium lanthanum titanate having the perovskite crystal structure. The sintered body can be obtained by, for example, a sintered body production method including a step for obtaining a molded body by molding a mixture of a precursor for lithium titanate and a precursor for lithium lanthanum titanate, or a mixture of lithium titanate and lithium lanthanum titanate, and a sintering step for sintering the molded body, or the like.
    Type: Application
    Filed: July 28, 2016
    Publication date: August 2, 2018
    Inventors: Ryota ESAKI, Tsutomu NISHIZAKI, Tetsuya TAMURA
  • Publication number: 20180175446
    Abstract: A garnet-type oxide sintered body according to the present invention includes crystal grains composed of a garnet-type oxide containing Li, La and Zr and a grain boundary composition containing boron and silicon and filling gaps between the crystal grains. The oxide sintered body has the characteristics of high density and high ion conductivity. A production method of the sintered body includes a step of providing a precursor material by mixing a garnet-type oxide powder containing Li, La and Zr with a sintering aid; a step of forming the precursor material into a formed body; and a sintering step of sintering the formed body. The sintering aid contains oxygen, boron, silicon and lithium. The oxygen and boron, or the oxygen and silicon, contained in the sintered aid form a compound.
    Type: Application
    Filed: July 13, 2016
    Publication date: June 21, 2018
    Applicant: Central Glass Company, Limited
    Inventors: Tsutomu NISHIZAKI, Ryota ESAKI, Tetsuya TAMURA
  • Publication number: 20170250405
    Abstract: Provided is a precursor with which it is possible to form a solid electrolyte and negative electrode active material while preventing loss of mass during firing at 1,000° C. or lower. A precursor for forming a composite product of lithium titanate and lithium lanthanum titanate by firing, wherein a precursor of a lithium titanate composite product is used that is characterized in comprising a solid material that includes a composite salt of Li and Ti and an La source compound. Such a precursor of a lithium titanate composite product is obtained by a production method that is characterized in including a step for forming a solid material by heating a mixture that includes at least a Ti source, a Li source, and solvent by solvothermal treatment.
    Type: Application
    Filed: July 30, 2015
    Publication date: August 31, 2017
    Inventors: Ryota ESAKI, Tsutomu NISHIZAKI, Tetsuya TAMURA
  • Publication number: 20160293947
    Abstract: This invention provides the following: a solid-electrolyte precursor that yields a solid electrolyte when fired at a temperature lower than the firing temperatures used in solid phase methods and has a low mass reduction rate when thus fired; a method for manufacturing said solid-electrolyte precursor; a method for manufacturing a solid electrolyte; and a method for manufacturing a solid-electrolyte/electrode-active-material complex. This solid-electrolyte precursor, which is fired at a temperature less than or equal to 1,000° C. in order to synthesize a solid electrolyte that has a single-phase perovskite structure or a single-phase garnet structure and contains lithium, a group 3 element, and a group 4 element and/or a group 5 element, contains lithium, an oxide and/or hydroxide of a group 3 element, and an oxide and/or hydroxide of a group 4 element and/or a group 5 element.
    Type: Application
    Filed: October 14, 2014
    Publication date: October 6, 2016
    Inventors: Tetsuya TAMURA, Ryota ESAKI, Tsutomu NISHIZAKI