期刊
ELECTROCHIMICA ACTA
卷 111, 期 -, 页码 136-143出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.07.183
关键词
Electrochemical polymerization; Polyaniline; Activated carbon nanofiber; Supercapacitor
资金
- National Research Foundation of Korea [3148213322]
- National Research Foundation of Korea [3148213322] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Vine-like polyaniline (PANI) nanostructures were prepared using electrochemical polymerization on activated carbon nanofibers (ACNF) in order to use as a supercapacitor. Electrospun polyacrylonitrile (PAN)-based nanofibers were firstly carbonized and physically activated to increase the specific surface area. The PANI formed a vine-like shape and well-contacted with the surface of ACNF. The remarkably improved electrochemical performances of PANI-deposited ACNF electrode were investigated using cyclic voltammetry (CV) and galvanostatic charge/discharge test, and electrochemical impedance analysis. The current area of the PANI-ACNF electrode is higher than that of ACNF electrode in CV curves and the specific capacitance of the PANI-ACNF was 832 Fg(-1) which is much higher than 353 Fg(-1) of ACNF at a current density of 1 Ag-1 in galvanostatic charge/discharge analysis. During galvanostatic charge/discharge test of 1000 cycles at 1 Ag-1, the PANI-ACNF sample keeps its specific capacitance up to the value of 765 Fg(-1) (92% retention). Also, the PANI nanostructure on the ACNF substrate achieved a rapid doping/dedoping process between the surface of electrode and electrolyte ions in comparison with ACNF electrode. (C) 2013 Elsevier Ltd. All rights reserved.
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