Patents by Inventor Takehide Honma

Takehide Honma 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: 20210039960
    Abstract: Provided is a cathode active material for a non-aqueous electrolyte secondary battery that improves the cycling characteristic and high-temperature storability without impairing the charge/discharge capacity and the output characteristics. A nickel cobalt containing composite hydroxide is obtained by using a batch type crystallization method in which a raw material aqueous solution that includes Ni, Co and Mg is supplied in an inert atmosphere to a reaction aqueous solution that is controlled so that the temperature is within the range 45° C. to 55° C., the pH value is within the range 10.8 to 11.8 at a reference liquid temperature of 25° C., and the ammonium-ion concentration is within the range 8 g/L to 12 g/L. An Al-coated composite hydroxide that is expressed by the general formula: Ni1-x-y-zCoxAlyMgz(OH)2 (where, 0.05?x?0.20, 0.01?y?0.06, and 0.01?z?0.
    Type: Application
    Filed: October 29, 2020
    Publication date: February 11, 2021
    Inventors: Takehide HONMA, Koji YAMAJI, Ryozo USHIO
  • Patent number: 10858265
    Abstract: Provided is a cathode active material for a non-aqueous electrolyte secondary battery that improves the cycling characteristic and high-temperature storability without impairing the charge/discharge capacity and the output characteristics. A nickel cobalt containing composite hydroxide is obtained by using a batch type crystallization method in which a raw material aqueous solution that includes Ni, Co and Mg is supplied in an inert atmosphere to a reaction aqueous solution that is controlled so that the temperature is within the range 45° C. to 55° C., the pH value is within the range 10.8 to 11.8 at a reference liquid temperature of 25° C., and the ammonium-ion concentration is within the range 8 g/L to 12 g/L. An Al-coated composite hydroxide that is expressed by the general formula: Ni1-x-y-zCoxAlyMgz(OH)2 (where, 0.05?x?0.20, 0.01?y?0.06, and 0.01?z?0.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: December 8, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Takehide Honma, Koji Yamaji, Ryozo Ushio
  • Publication number: 20190260024
    Abstract: Provided are a nickel-manganese composite hydroxide capable of producing a secondary battery having a high particle fillability and excellent battery characteristics when used as a precursor of a positive electrode active material and a method for producing the same. A nickel-manganese composite hydroxide is represented by General Formula: NixMnyMz(OH)2+? and contains a secondary particle formed of a plurality of flocculated primary particles. The primary particles have an aspect ratio of at least 3, and at least some of the primary particles are disposed radially from a central part of the secondary particle toward an outer circumference thereof. The secondary particle has a ratio I(101)/I(001) of a diffraction peak intensity I(101) of a 101 plane to a peak intensity I(001) of a 001 plane, measured by an X-ray diffraction measurement, of up to 0.15.
    Type: Application
    Filed: June 6, 2017
    Publication date: August 22, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Takuma Nakamura, Haruki Kaneda, Takehide Honma, Takaaki Ando, Koji Yamaji
  • Patent number: 10361433
    Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery contains lithium nickel cobalt zinc composite oxide represented by general formula (1): LiwNi1-x-y-zCoxZnyMzO2 (0.95?w?1.10, 0.05?x?0.3, 0.005?y?0.08, and 0?z?0.3, where M is at least one metal element selected from the group consisting of Mg, Al, Ti, Mn, Fe, and Cu), wherein the lithium nickel cobalt zinc composite oxide has a form of secondary particles each corresponding to an aggregation of primary particles of hexagonal lithium-containing composite oxide with a layered structure, contains zinc oxide on at least a part of a surface of the primary particles and/or a surface of the secondary particles, and has a (003)-plane crystallite diameter of 100 nm or larger and 160 nm or smaller, the diameter being obtained by X-ray diffraction and the Scherrer equation.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: July 23, 2019
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Koji Yamaji, Ryozo Ushio, Takehide Honma, Satoshi Yoshio
  • Patent number: 10236507
    Abstract: The object of the present invention is to improve the roundness of nickel-manganese composite hydroxide particles obtained by a crystallization process, and to improve the filling characteristic of cathode active material produced using the nickel-manganese composite hydroxide particles as a precursor. A reaction aqueous solution is formed by supplying a raw material aqueous solution including at least Ni and Mn, an aqueous solution including an ammonium-ion donor, and an alkali solution into a reaction tank, and mixing, then nickel-manganese composite hydroxide particles are crystallized. When doing this, the oxygen concentration inside the reaction tank is controlled to be 3.0% by volume or greater, the temperature of the reaction aqueous solution is controlled to be 35° C. to 60° C., and the nickel-ion concentration is controlled to be 1,000 mg/L or greater.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: March 19, 2019
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Koji Yamaji, Takehide Honma, Ryozo Ushio
  • Publication number: 20180331358
    Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery contains lithium nickel cobalt zinc composite oxide represented by general formula (1): LiwNi1-x-y-zCoxZnyMzO2(0.95?w?1.10, 0.05?x?0.3, 0.005?y?0.08, and 0?z?0.3, where M is at least one metal element selected from the group consisting of Mg, Al, Ti, Mn, Fe, and Cu), wherein the lithium nickel cobalt zinc composite oxide has a form of secondary particles each corresponding to an aggregation of primary particles of hexagonal lithium-containing composite oxide with a layered structure, contains zinc oxide on at least a part of a surface of the primary particles and/or a surface of the secondary particles, and has a (003)-plane crystallite diameter of 100 nm or larger and 160 nm or smaller, the diameter being obtained by X-ray diffraction and the Scherrer equation.
    Type: Application
    Filed: November 13, 2015
    Publication date: November 15, 2018
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Koji Yamaji, Ryozo Ushio, Takehide Honma, Satoshi Yoshio
  • Patent number: 10084188
    Abstract: A positive electrode active material is provided that has a high capacity, a low irreversible capacity, an excellent initial charge/discharge efficiency, and excellent rate characteristics. This positive electrode active material comprises a hexagonal lithium nickel complex oxide having a layer structure and represented by the general formula LixNi1?y?zCoyMzO2 (0.98?x?1.04, 0.25?y?0.40, 0?z?0.07, and M is at least one element selected from Al, Ti, Mn, Ga, Mg, and Nb), wherein a lithium occupancy rate in a lithium main layer as obtained by Rietveld analysis from the x-ray diffraction pattern is at least 98.7%, and a crystallite diameter as calculated from the peak for the (003) plane in x-ray diffraction is 50 to 300 nm.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: September 25, 2018
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kensaku Mori, Masanori Takagi, Koji Yamaji, Takehide Honma, Ryozo Ushio
  • Publication number: 20180215629
    Abstract: Provided is a cathode active material for a non-aqueous electrolyte secondary battery that improves the cycling characteristic and high-temperature storability without impairing the charge/discharge capacity and the output characteristics. A nickel cobalt containing composite hydroxide is obtained by using a batch type crystallization method in which a raw material aqueous solution that includes Ni, Co and Mg is supplied in an inert atmosphere to a reaction aqueous solution that is controlled so that the temperature is within the range 45° C. to 55° C., the pH value is within the range 10.8 to 11.8 at a reference liquid temperature of 25° C., and the ammonium-ion concentration is within the range 8 g/L to 12 g/L. An Al-coated composite hydroxide that is expressed by the general formula: Ni1-x-y-zCoxAlyMgz(OH)2 (where, 0.05?x?0.20, 0.01?y?0.06, and 0.01?z?0.
    Type: Application
    Filed: April 27, 2016
    Publication date: August 2, 2018
    Inventors: Takehide HONMA, Koji YAMAJI, Ryozo USHIO
  • Publication number: 20170012288
    Abstract: The object of the present invention is to improve the roundness of nickel-manganese composite hydroxide particles obtained by a crystallization process, and to improve the filling characteristic of cathode active material produced using the nickel-manganese composite hydroxide particles as a precursor. A reaction aqueous solution is formed by supplying a raw material aqueous solution including at least Ni and Mn, an aqueous solution including an ammonium-ion donor, and an alkali solution into a reaction tank, and mixing, then nickel-manganese composite hydroxide particles are crystallized. When doing this, the oxygen concentration inside the reaction tank is controlled to be 3.0% by volume or greater, the temperature of the reaction aqueous solution is controlled to be 35° C. to 60° C., and the nickel-ion concentration is controlled to be 1,000 mg/L or greater.
    Type: Application
    Filed: January 29, 2015
    Publication date: January 12, 2017
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Koji YAMAJI, Takehide HONMA, Ryozo USHIO
  • Publication number: 20150188136
    Abstract: A positive electrode active material is provided that has a high capacity, a low irreversible capacity, an excellent initial charge/discharge efficiency, and excellent rate characteristics. This positive electrode active material comprises a hexagonal lithium nickel complex oxide having a layer structure and represented by the general formula LixNi1-y-zCoyMzO2 (0.98?x?1.04, 0.25?y?0.40, 0?z?0.07, and M is at least one element selected from Al, Ti, Mn, Ga, Mg, and Nb), wherein a lithium occupancy rate in a lithium main layer as obtained by Rietveld analysis from the x-ray diffraction pattern is at least 98.7%, and a crystallite diameter as calculated from the peak for the (003) plane in x-ray diffraction is 50 to 300 nm.
    Type: Application
    Filed: July 1, 2013
    Publication date: July 2, 2015
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kensaku Mori, Masanori Takagi, Koji Yamaji, Takehide Honma, Ryozo Ushio