Patents by Inventor Jeh-Won Choi

Jeh-Won Choi 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: 7901813
    Abstract: The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery. According to the present invention, an organometallic compound represented by the Chemical Formula 1 is added to a non-aqueous electrolyte of a battery as an additive, and thus if a battery voltage is out of normal operation voltage range due to a short circuit and overcharge of a battery, etc., the non-aqueous electrolyte additive decomposes and a part of the decomposed additive polymerizes to form an insulating film on a cathode surface, and a part of the metal reacts with an insulating film formed on a cathode surface to improve thermal stability of the battery, thereby improving safety of the battery.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: March 8, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Hong-Kyu Park, Jeh-Won Choi, Yeon-Hee Lee, Young-Tack An, Hyeong-Jin Kim
  • Publication number: 20070134557
    Abstract: The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery. According to the present invention, an organometallic compound represented by the Chemical Formula 1 is added to a non-aqueous electrolyte of a battery as an additive, and thus if a battery voltage is out of normal operation voltage range due to a short circuit and overcharge of a battery, etc., the non-aqueous electrolyte additive decomposes and a part of the decomposed additive polymerizes to form an insulating film on a cathode surface, and a part of the metal reacts with an insulating film formed on a cathode surface to improve thermal stability of the battery, thereby improving safety of the battery.
    Type: Application
    Filed: January 10, 2007
    Publication date: June 14, 2007
    Inventors: Hong-Kyu Park, Jeh-Won Choi, Yeon-Hee Lee, Young-Tack An, Hyeong-Jin Kim
  • Patent number: 7217479
    Abstract: The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery. According to the present invention, an organometallic compound represented by the Chemical Formula 1 is added to a non-aqueous electrolyte of a battery as an additive, and thus if a battery voltage is out of normal operation voltage range due to a short circuit and overcharge of a battery, etc., the non-aqueous electrolyte additive decomposes and a part of the decomposed additive polymerizes to form an insulating film on a cathode surface, and a part of the metal reacts with an insulating film formed on a cathode surface to improve thermal stability of the battery, thereby improving safety of the battery.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: May 15, 2007
    Assignee: LG Chem, Ltd
    Inventors: Hong-Kyu Park, Jeh-Won Choi, Yeon-Hee Lee, Young-Tack An, Hyeong-Jin Kim
  • Patent number: 7217477
    Abstract: The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery. According to the present invention, an organometallic compound represented by the Chemical Formula 1 is added to a non-aqueous electrolyte of a battery as an additive, and thus if a battery voltage is out of normal operation voltage range due to a short circuit and overcharge of a battery, etc., the non-aqueous electrolyte additive decomposes and a part of the decomposed additive polymerizes to form an insulating film on a cathode surface, and a part of the metal reacts with an insulating film formed on a cathode surface to improve thermal stability of the battery, thereby improving safety of the battery.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: May 15, 2007
    Assignee: LG Chem, Ltd.
    Inventors: Hong-Kyu Park, Jeh-Won Choi, Yeon-Hee Lee, Young-Tack An, Hyeong-Jin Kim
  • Publication number: 20030175595
    Abstract: The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery.
    Type: Application
    Filed: December 31, 2002
    Publication date: September 18, 2003
    Inventors: Hong-Kyu Park, Jeh-Won Choi, Yeon-Hee Lee, Young-Tack An, Hyeong-Jin Kim
  • Publication number: 20030175596
    Abstract: The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery.
    Type: Application
    Filed: December 31, 2002
    Publication date: September 18, 2003
    Inventors: Hong-Kyu Park, Jeh-Won Choi, Yeon-hee Lee, Young-Tack An, Hyeong-Jin Kim