Patents by Inventor Jae-yul Lyu

Jae-yul Lyu 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).

  • Active material for negative electrode used in lithium-ion battery and method of manufacturing same
    Patent number: 6596437
    Abstract: Disclosed is negative electrode active material for lithium ion batteries and a method for manufacturing the same. The active material includes a crystalline carbon core; and an amorphous or turbostratic carbon shell evenly covering the crystalline carbon core, the carbon shell having a thickness of 10-2000 Å. The method includes the steps of chemically combining a crystalline carbon and an amorphous carbon precursor; removing remaining amorphous carbon precursor not reacted in the chemical combination; and heat-treating a chemical combination material of graphite and the amorphous carbon precursor obtained in the chemical combination.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: July 22, 2003
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Sang-young Yoon, Jeong-ju Cho, Jae-yul Lyu
  • Active material for negative electrode used in lithium-ion battery and method of manufacturing same
    Publication number: 20020076614
    Abstract: Disclosed is negative electrode active material for lithium ion batteries and a method for manufacturing the same. The active material includes a crystalline carbon core; and an amorphous or turbostratic carbon shell evenly covering the crystalline carbon core, the carbon shell having a thickness of 10-2000Å. The method includes the steps of chemically combining a crystalline carbon and an amorphous carbon precursor; removing remaining amorphous carbon precursor not reacted in the chemical combination; and heat-treating a chemical combination material of graphite and the amorphous carbon precursor obtained in the chemical combination.
    Type: Application
    Filed: August 6, 2001
    Publication date: June 20, 2002
    Inventors: Sang-young Yoon, Jeong-ju Cho, Jae-yul Lyu