Patents by Inventor Yoo-jung Kwon

Yoo-jung Kwon 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).

  • High heat resistance composite separator for lithium secondary battery and lithium secondary battery including same
    Patent number: 10090501
    Abstract: Disclosed is a high heat resistance composite separator including a porous substrate having a plurality of pores, an inorganic coating layer formed on one surface of the porous substrate, the inorganic coating layer including a plurality of inorganic particles and a binder polymer disposed on a portion or all of surfaces of the inorganic particles to connect and bind the inorganic particles, and a high heat resistance polymer coating layer formed on the other surface of the porous substrate, the high heat resistance polymer coating layer including a high heat resistance polymer and inorganic particles dispersed in the high heat resistance polymer.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: October 2, 2018
    Assignee: Kokam Co., Ltd.
    Inventors: Ji-Jun Hong, Sung-Tae Ko, Yoon-Jeong Heo, Yoo-Jung Kwon
  • HIGH HEAT RESISTANCE COMPOSITE SEPARATOR FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING SAME
    Publication number: 20140370358
    Abstract: Disclosed is a high heat resistance composite separator including a porous substrate having a plurality of pores, an inorganic coating layer formed on one surface of the porous substrate, the inorganic coating layer including a plurality of inorganic particles and a binder polymer disposed on a portion or all of surfaces of the inorganic particles to connect and bind the inorganic particles, and a high heat resistance polymer coating layer formed on the other surface of the porous substrate, the high heat resistance polymer coating layer including a high heat resistance polymer and inorganic particles dispersed in the high heat resistance polymer.
    Type: Application
    Filed: February 13, 2012
    Publication date: December 18, 2014
    Applicant: Kokam Co., Ltd.
    Inventors: Ji-Jun Hong, Sung-Tae Ko, Yoon-Jeong Heo, Yoo-Jung Kwon
  • Method of preparing metal nanocrystal
    Patent number: 7780758
    Abstract: Methods of preparing capped metal nanocrystals are provided. One method includes reacting a metal nanocrystal precursor with a reducing agent in a solution having a platinum catalyst.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: August 24, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin-hwan Park, Han-su Kim, Seok-gwang Doo, Jae-phil Cho, Hyo-jin Lee, Yoo-jung Kwon
  • Method of preparing metal nanocrystal
    Publication number: 20070287288
    Abstract: Methods of preparing capped metal nanocrystals are provided. One method includes reacting a metal nanocrystal precursor with a reducing agent in a solution having a platinum catalyst.
    Type: Application
    Filed: January 9, 2007
    Publication date: December 13, 2007
    Inventors: Jin-hwan Park, Han-su Kim, Seok-gwang Doo, Jae-phil Cho, Hyo-jin Lee, Yoo-jung Kwon
  • NEGATIVE ACTIVE MATERIAL INCLUDING METAL NANOCRYSTAL COMPOSITE, METHOD OF PREPARING THE SAME, AND ANODE AND LITHIUM BATTERY INCLUDING THE NEGATIVE ACTIVE MATERIAL
    Publication number: 20070264574
    Abstract: Negative active materials including metal nanocrystal composites comprising metal nanocrystals having an average particle diameter of about 20 nm or less and a carbon coating layer are provided. The negative active material includes metal nanocrystals coated by a carbon layer, which decreases the absolute value of the change in volume during charge/discharge and decreases the formation of cracks in the negative active material resulting from a difference in the volume change rate during charge/discharge between metal and carbon. Therefore, high charge/discharge capacities and improved capacity retention capabilities can be obtained.
    Type: Application
    Filed: April 17, 2007
    Publication date: November 15, 2007
    Inventors: Han-su Kim, Jin-hwan Park, Seok-gwang Doo, Jae-phil Cho, Hyo-jin Lee, Yoo-jung Kwon