Abstract: 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.

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.

Abstract: The present invention relates to a paper current collector, a method of manufacturing the same, and an electrochemical device including the same. Since a paper current collector according to the present invention includes a conductive layer which includes a conductive material forming a conductive network with nanocellulose fiber on a fiber layer including the nanocellulose fiber, there are advantages in that a weight is low, an energy density of an electrode is high when the electrode is manufactured, mechanical flexibility is superior, and electrical properties and transparency of a material may also be secured.

Abstract: The present invention relates to a method for manufacturing activated carbon using a coffee bean extract, and an electrode for a battery comprising same. The method for manufacturing activated carbon, according to the present invention, is safe for the human body by using an extract obtained from food, such as coffee beans, as an activation catalyst when carbidizing cellulose, and allows easy maintenance and repair of processing equipment, thereby providing the advantages of excellent productivity, economic feasibility, and also of being environmentally friendly due to utilization of discarded food waste. In addition, activated carbon manufactured by the method has a large specific surface area and has fine pores having a diameter of no more than 2 nm, thereby being useful when applied to electrode materials for a super capacitor, among others.

Abstract: 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.

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.

Abstract: Provided are an electrode for an electrochemical device, a method for producing the same, and an electrochemical device including the electrode. The electrode for an electrochemical device includes: a network structure including a cellulose fiber and a conductive material in which the ratio of the length to the thickness (L/D) is 50 or more; and an active material which is dispersed in the network structure.

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.

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.