期刊
ELECTROCHIMICA ACTA
卷 55, 期 13, 页码 4170-4173出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.02.095
关键词
Graphene; ZnO; SnO2; Supercapacitors; Composite films
资金
- Shanghai Pujiang Program [08PJ14043]
- Special Project for Nanotechnology of Shanghai [0952nm02200]
- Program of Shanghai Subject Chief Scientist [08XD1421000]
Graphene, graphene-ZnO and graphene-SnO2 films were successfully synthesized and used as electrode materials for electrochemical supercapacitors, respectively. The screen-printing approach was employed to fabricate graphene film on graphite substrate while the ZnO and SnO2 were deposited on graphene films by ultrasonic spray pyrolysis. The electrochemical performances of these electrodes were comparatively analyzed through electrochemical impedance spectrometry, cyclic voltammetry and chronopotentiometry tests. The results showed that the incorporation of ZnO or SnO2 improved the capacitive performance of graphene electrode. Graphene-ZnO composite electrode exhibited higher capacitance value (61.7 Fig) and maximum power density (4.8 kW/kg) as compared with graphene-SnO2 and pure graphene electrodes. (C) 2010 Elsevier Ltd. All rights reserved.
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