Patents Assigned to Korea Forest research Institute
  • Electrochemical element comprising cellulose nanofiber separator and method for producing same
    Patent number: 11251459
    Abstract: The present invention relates to an electrochemical element and a method for producing same, the electrochemical element comprising: electrodes comprising a composite of active material and conductive material having a nanofiber structure; and a cellulose nanofiber separator combined with the electrodes. The electrochemical element according to the present invention obviates the need for separate binder and electrode current collector, has a stable interfacial surface due to the physical union of the separator and electrode, can assure superb mechanical and physical properties, and can maintain stable battery performance even against deformations due to a variety of external impact.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: February 15, 2022
    Assignee: Korea Forest Research Institute
    Inventors: Sun Young Lee, Sang Young Lee, Keun Ho Choi, Sang Jin Chun, Sang Bum Park, Don Ha Choi, Sung Ju Cho, Jong Tae Yoo, Chang Kee Lee, Woong Kim, Qinglin Wu
  • Porous separation film for secondary battery including cellulose fiber and silica, and method for manufacturing same
    Patent number: 10069127
    Abstract: The present invention relates to a composite separation film comprising cellulose fiber and silica, a method for manufacturing the separation film, and a secondary battery including the separation film, wherein the separation film has excellent thermal stability, dimensional stability, wettability and electrochemical stability and has a simplified manufacturing process such that the unit cost of production can be reduced.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: September 4, 2018
    Assignee: Korea Forest Research Institute
    Inventors: Sun Young Lee, Sang Young Lee, Sang Jin Chun, Sang Bum Park, Don Ha Choi
  • ELECTROCHEMICAL ELEMENT COMPRISING CELLULOSE NANOFIBER SEPARATOR AND METHOD FOR PRODUCING SAME
    Publication number: 20170222252
    Abstract: The present invention relates to an electrochemical element and a method for producing same, the electrochemical element comprising: electrodes comprising a composite of active material and conductive material having a nanofiber structure; and a cellulose nanofiber separator combined with the electrodes. The electrochemical element according to the present invention obviates the need for separate binder and electrode current collector, has a stable interfacial surface due to the physical union of the separator and electrode, can assure superb mechanical and physical properties, and can maintain stable battery performance even against deformations due to a variety of external impact.
    Type: Application
    Filed: September 29, 2014
    Publication date: August 3, 2017
    Applicant: Korea Forest Research Institute
    Inventors: Sun Young LEE, Sang Young LEE, Keun Ho CHOI, Sang Jin CHUN, Sang Bum PARK, Don Ha CHOI, Sung Ju CHO
  • POROUS SEPARATION FILM FOR SECONDARY BATTERY INCLUDING CELLULOSE FIBER AND SILICA, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20150333306
    Abstract: The present invention relates to a composite separation film comprising cellulose fiber and silica, a method for manufacturing the separation film, and a secondary battery including the separation film, wherein the separation film has excellent thermal stability, dimensional stability, wettability and electrochemical stability and has a simplified manufacturing process such that the unit cost of production can be reduced.
    Type: Application
    Filed: January 8, 2013
    Publication date: November 19, 2015
    Applicant: Korea Forest research Institute
    Inventors: Sun Young LEE, Sang Young LEE, Sang Jin CHUN, Sang Bum PARK, Don Ha CHOI