Patents by Inventor Tegi RI

Tegi RI 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).

  • Cathode active material for lithium ion secondary battery, and process for its production
    Patent number: 10910640
    Abstract: To provide a cathode active material for a lithium ion secondary battery excellent in the cycle characteristics and rate characteristics even when charging is conducted at a high voltage. A cathode active material for a lithium ion secondary battery, which comprises particles (III) having a covering layer comprising a metal oxide (I) containing at least one metal element selected from the group consisting of elements in Groups 3 and 13 of the periodic table and lanthanoid elements, and a compound (II) containing Li and P, on the surface of a lithium-containing composite oxide comprising lithium and a transition metal element, wherein the atomic ratio of said P to said metal element (P/metal element) contained within 5 nm of the surface layer of the particles (III) is from 0.03 to 0.45.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: February 2, 2021
    Assignee: SUMITOMO CHEMICAL CO., LTD
    Inventors: Takeshi Kawasato, Kentaro Tsunozaki, Haisheng Zeng, Yasuyuki Takimoto, Toshio Suzuki, Tegi Ri
  • CATHODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, AND PROCESS FOR ITS PRODUCTION
    Publication number: 20190245202
    Abstract: To provide a cathode active material for a lithium ion secondary battery excellent in the cycle characteristics and rate characteristics even when charging is conducted at a high voltage. A cathode active material for a lithium ion secondary battery, which comprises particles (III) having a covering layer comprising a metal oxide (I) containing at least one metal element selected from the group consisting of elements in Groups 3 and 13 of the periodic table and lanthanoid elements, and a compound (II) containing Li and P, on the surface of a lithium-containing composite oxide comprising lithium and a transition metal element, wherein the atomic ratio of said P to said metal element (P/metal element) contained within 5 nm of the surface layer of the particles (III) is from 0.03 to 0.45.
    Type: Application
    Filed: April 17, 2019
    Publication date: August 8, 2019
    Applicant: SUMITOMO CHEMICAL CO., LTD
    Inventors: Takeshi KAWASATO, Kentaro Tsunozaki, Haisheng Zeng, Yasuyuki Takimoto, Toshio Suzuki, Tegi Ri
  • Cathode active material for lithium ion secondary battery, and process for its production
    Patent number: 10326127
    Abstract: To provide a cathode active material for a lithium ion secondary battery excellent in the cycle characteristics and rate characteristics even when charging is conducted at a high voltage. A cathode active material for a lithium ion secondary battery, which comprises particles (III) having a covering layer comprising a metal oxide (I) containing at least one metal element selected from the group consisting of elements in Groups 3 and 13 of the periodic table and lanthanoid elements, and a compound (II) containing Li and P, on the surface of a lithium-containing composite oxide comprising lithium and a transition metal element, wherein the atomic ratio of said P to said metal element (P/metal element) contained within 5 nm of the surface layer of the particles (III) is from 0.03 to 0.45.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: June 18, 2019
    Assignee: SUMITOMO CHEMICAL CO., LTD.
    Inventors: Takeshi Kawasato, Kentaro Tsunozaki, Haisheng Zeng, Yasuyuki Takimoto, Toshio Suzuki, Tegi Ri
  • CATHODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, AND PROCESS FOR ITS PRODUCTION
    Publication number: 20140212758
    Abstract: To provide a cathode active material for a lithium ion secondary battery excellent in the cycle characteristics and rate characteristics even when charging is conducted at a high voltage. A cathode active material for a lithium ion secondary battery, which comprises particles (III) having a covering layer comprising a metal oxide (I) containing at least one metal element selected from the group consisting of elements in Groups 3 and 13 of the periodic table and lanthanoid elements, and a compound (II) containing Li and P, on the surface of a lithium-containing composite oxide comprising lithium and a transition metal element, wherein the atomic ratio of said P to said metal element (P/metal element) contained within 5 nm of the surface layer of the particles (III) is from 0.03 to 0.45.
    Type: Application
    Filed: March 31, 2014
    Publication date: July 31, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Takeshi KAWASATO, Kentaro TSUNOZAKI, Haisheng ZENG, Yasuyuki TAKIMOTO, Toshio SUZUKI, Tegi RI