期刊
ELECTROCHIMICA ACTA
卷 59, 期 -, 页码 100-104出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.10.036
关键词
Supercapacitor; Activated carbon; Coupling agent
资金
- National Science Foundation for Young Scientists of China [21003081]
- Higher Education Institutions of Liaoning Province of China [LS2010001]
A novel and simple strategy by introducing a silane coupling agent into the electrode to improve the supercapacitor performance has been developed in this study. The surface modification of the activated carbon material and the Al current collector are conducted under two different neutral and acidic conditions. The improved electrodes are characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), mechanical tests and electrochemical measurements. The obtained results reveal that the treated activated carbon electrode retains good mechanical properties with decreased bonder content. The electrode prepared using activated carbon treated with the silane coupling agent in acetic acid conditions (pH = 5.0) and a bonder mass content of 7.0% shows the best electrochemical performance. The specific capacitance reaches 352.5 F g(-1), whereas the internal resistance and charge-discharge efficiency are 0.82 Omega and 98.2% respectively. (C) 2011 Elsevier Ltd. All rights reserved.
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