Patents by Inventor Seung W. Chu

Seung W. Chu 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).

  • Secondary battery of improved high-rate discharging properties
    Patent number: 8129053
    Abstract: Provided is a secondary battery comprising a cathode active material having low-electrolyte wettability as a main ingredient, which is capable of improving high-rate discharge properties by an addition of a perfluorinated sulfonamide substituent-containing polymer (“additive”) to a cathode mix and/or an electrolyte.
    Type: Grant
    Filed: August 4, 2007
    Date of Patent: March 6, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Seung W. Chu, Dongmyung Kim, Kwonyoung Choi, Yong Jeong Kim, Jong Hee Kim, Dong Myung Oh, Bora Shin
  • Jelly-roll having active material layer with different loading amount
    Patent number: 8129049
    Abstract: Disclosed herein is a jelly-roll type electrode assembly (“jelly-roll”) of a cathode/separator/anode structure, wherein the jelly-roll is constructed in a structure in which each electrode has active material layers formed on opposite major surfaces of a sheet-type current collector, the loading amount of an active material for the inner active material layer, constituting the inner surface of each sheet when each sheet is wound, is less than that of an active material for the outer active material layer, constituting the outer surface of each sheet when each sheet is wound, and the loading amount of the active material for the inner active material layer gradually increases from the central region of each wound sheet to the outermost region of each wound sheet.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: March 6, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Jong Hee Kim, Dongmyung Kim, Hyungook Yoon, Yong Jeong Kim, Joo-Hwan Sung, Seung W. Chu, Sung-Pil Yoon, Dohyun Lee
  • JELLY-ROLL HAVING ACTIVE MATERIAL LAYER WITH DIFFERENT LOADING AMOUNT
    Publication number: 20100104930
    Abstract: Disclosed herein is a jelly-roll type electrode assembly (“jelly-roll”) of a cathode/separator/anode structure, wherein the jelly-roll is constructed in a structure in which each electrode has active material layers formed on opposite major surfaces of a sheet-type current collector, the loading amount of an active material for the inner active material layer, constituting the inner surface of each sheet when each sheet is wound, is less than that of an active material for the outer active material layer, constituting the outer surface of each sheet when each sheet is wound, and the loading amount of the active material for the inner active material layer gradually increases from the central region of each wound sheet to the outermost region of each wound sheet.
    Type: Application
    Filed: March 24, 2008
    Publication date: April 29, 2010
    Applicant: LG Chem, Ltd.
    Inventors: Jong Hee Kim, Dongmyung Kim, Hyungook Yoon, Yong Jeong Kim, Joo-Hwan Sung, Seung W. Chu, Sung-Pil Yoon, Dohyun Lee
  • SECONDARY BATTERY OF IMPROVED HIGH-RATE DISCHARGING PROPERTIES
    Publication number: 20100047694
    Abstract: Provided is a secondary battery comprising a cathode active material having low-electrolyte wettability as a main ingredient, which is capable of improving high-rate discharge properties by an addition of a perfluorinated sulfonamide substituent-containing polymer (“additive”) to a cathode mix and/or an electrolyte.
    Type: Application
    Filed: August 4, 2007
    Publication date: February 25, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Seung W. Chu, Dongmyung Kim, Kwonyoung Choi, Yong Jeong Kim, Jong Hee Kim, Dong Myung Oh, Bora Shin