期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 43, 期 36, 页码 17328-17337出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.07.093
关键词
Polyacrylonitrile; Manganese oxide; Carbon fiber; Polypyrrole; Supercapacitor
资金
- Universiti Putra Malaysia [GP-IPS/2018/9619300]
A supercapacitor electrode comprising conducting polypyrrole (PPy) coated on manganese oxide-carbon fiber (CNF-MnO2) was successfully synthesized using electrospinning, followed by carbonization and in-situ polymerization. A non-uniform distribution of PPy on the surface of CNF-MnO2 was observed via FESEM analysis. The chemical bonding of CNF MnO2/PPy and the valence state of manganese were revealed via FTIR, Raman spectroscopy, XRD and XPS measurements. CNF-MnO2/PPy composite possessed high specific capacitance and specific energy of 315.80 Fg(-1) and 13.68 Wh/kg, respectively. In addition, good electrochemical reversibility was proven upon CNF-MnO2/PPy even at higher sweep rate (5-200 mV/s). Moreover, this one-dimensional electrode achieved an excellent long-term cycling stability (82.46%) over 2000 CV cycles with low charge transfer resistance (4.61 Omega). The modification of CNF-MnO2/PPy contributes to good synergistic effects among the material which improve the electrochemical behavior of manganese oxide-based fiber composite for future supercapacitor. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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