|
|
| Type |
Poster Presentation |
| Area |
Industrial Chemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
IND.P-20 |
| Subject |
Designing three-dimensional reduced graphene oxide/CNT foams from aqueous medium and their supercapacitive behaviors |
| Authors |
Yeong-rae Son, Soo-Jin Park*
Department of Chemistry, Inha University, Korea
|
| Abstract |
Intercalation of spacers and modification of the nano/microstructure have been studied extensively to solve the restacking problems associated with graphene. However, the existing methods of structure modification to generate 3-dimensional (3D) framework are complex and inefficient. In this study, 3D graphene oxide/carbon nanotube (GO/CNT) foams were prepared by integrating GO sheets and CNTs from water-ethanol system via freezing and lyophilization without using any other materials. The GO sheets acted as a dispersing agent for carbon nanotubes in water and ethanol inhibited ice crystal growth as the temperature of the aqueous solution decreased, leading to an eco-friendly preparation of 3D graphene-based foam. The prepared GO/CNT foam exhibited special characteristics, such as a sponge-like morphology and unique textural properties, owing to the insertion of CNTs between GO layers. The GO/CNT foam could be reduced by thermal treatment without deformation, resulting in electrically conductive graphene-based foam with 3D networks. Furthermore, a supercapacitor composed of the reduced foam as electrodes and GO membrane as separator with electrolyte permeability and insulating properties was fabricated. The resultant supercapacitor showed distinctive electrochemical behaviors including high rate capability and cycle behavior because the unique structure of the foam led to rapid electrolyte ion diffusion. |
| E-mail |
rosysky2010@naver.com |
|
122nd General Meeting of the KCS