Korea Forest Research Institute

National Institute of Forest Science

Republic of Korea

Sang Jin Chun

Sun Young Lee

Sang Bum Park

Don Ha Choi

Sang Young Lee

Woong Bae Kim

Won Hee Lee

Qinglin Wu

Chang Kee Lee

Yong H Yoon

Jong Tae Yoo

Keun Ho Choi

Sung Ju Cho

Ji Hyeon Lee

Geum Hyun Doh

Cheol Su Jung

Jung Hwan Kim

The present invention relates to a composite material including a porous titania thin film and a preparation method therefor. A composite material according to the present invention allows for a simple thin film formation process because of the use of cellulose crystals, makes it easy to control the structure of the titanium dioxide thin film provided therefor, has a large specific area, and is superior in terms of scratch resistance and photoactivity, thus finding useful applications in the various fields utilizing titanium dioxide as a photocatalyst.

Method for preparing porous titania thin film by using cellulose nanocrystal

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.

Electrochemical element comprising cellulose nanofiber separator and method for producing same

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.

Porous separation film for secondary battery including cellulose fiber and silica, and method for manufacturing same

Growing community of inventors

Namyangju-si, South Korea

Sang Jin Chun