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Preparation and characterization of RuO2 ยท xH2O/carbon aerogel composites for supercapacitors.
- Source :
-
Journal of Applied Electrochemistry . Oct2007, Vol. 37 Issue 10, p1129-1135. 7p. 1 Black and White Photograph, 1 Chart, 7 Graphs. - Publication Year :
- 2007
-
Abstract
- A series of RuO2 · xH2O/carbon aerogel (CA) composite electrode materials was prepared by a chemical precipitation method. Ultrasonication was used to accelerate the chemical reaction and improve the dispersion of RuO2 · xH2O particles on the surface and the pores of the aerogel. The structure and morphology of the as-prepared composite were characterized by N2 adsorption isotherm, X-ray diffraction (XRD), and field emission-scanning electron microscopy (FE-SEM). The results showed that the CA had a pearly network structure and the composites had a relatively high specific surface area and mesopore volume. The electrochemical performance of the composite electrodes was studied by cyclic voltammetry, galvanostatic charge/discharge measurements and electrochemical impedance measurements. The results indicated a substantial increase in the specific capacitance of the composite. Moreover, the utilization efficiency of RuO2 · xH2O was greatly improved by loading it on the conductive and porous CA due to a significant improvement in the inter-particle electronic conductivity and the extensive mesoporous network of the composites. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0021891X
- Volume :
- 37
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Electrochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 26530235
- Full Text :
- https://doi.org/10.1007/s10800-007-9372-7