Patents by Inventor Takuo Yoneda

Takuo Yoneda 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).

  • Positive electrode active material for nonaqueous electrolyte secondary battery, positive electrode for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery
    Patent number: 11552287
    Abstract: The positive electrode active material with lithium composite oxide A containing W and Ni and W-free lithium composite oxide B containing Ni. Regarding the lithium composite oxide A, the proportion of Ni relative to the total moles of metal elements except for lithium is 30 to 60 mol %, 50% particle size D50 is 2 to 6 ?m, 10% particle size D10 is 1.0 ?m or more, and 90% particle size D90 is 6.8 ?m or less. Regarding the lithium composite oxide B, the proportion of Ni relative to the total moles of metal elements except for lithium is 50 to 95 mol %, 50% particle size D50 is 10 to 22 ?m, 10% particle size D10 is 7.0 ?m or more, and 90% particle size D90 is 22.5 ?m or less. The mass ratio of the lithium composite oxide B to the lithium composite oxide A is 1:1 to 5.7:1.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: January 10, 2023
    Assignees: PANASONIC HOLDINGS CORPORATION, SANYO Electric Co., Ltd.
    Inventors: Hidekazu Hiratsuka, Takuo Yoneda
  • POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    Publication number: 20210083270
    Abstract: The positive electrode active material with lithium composite oxide A containing W and Ni and W-free lithium composite oxide B containing Ni. Regarding the lithium composite oxide A, the proportion of Ni relative to the total moles of metal elements except for lithium is 30 to 60 mol %, 50% particle size D50 is 2 to 6 ?m, 10% particle size D10 is 1.0 ?m or more, and 90% particle size D90 is 6.8 ?m or less. Regarding the lithium composite oxide B, the proportion of Ni relative to the total moles of metal elements except for lithium is 50 to 95 mol %, 50% particle size D50 is 10 to 22 ?m, 10% particle size D10 is 7.0 ?m or more, and 90% particle size D90 is 22.5 ?m or less. The mass ratio of the lithium composite oxide B to the lithium composite oxide A is 1:1 to 5.7:1.
    Type: Application
    Filed: December 14, 2018
    Publication date: March 18, 2021
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Hidekazu Hiratsuka, Takuo Yoneda