期刊
CHEMICAL ENGINEERING SCIENCE
卷 156, 期 -, 页码 178-185出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2016.09.025
关键词
Ternary hierarchical nanofibers; Manganese dioxide; Polyaniline; Multiwalled carbon nanotube; Supercapacitors
资金
- Natural Science Foundation of Jiangsu Province [BK20130247, BK20161329]
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology [BM2012110]
- Qing Lan Project of Higher Learning Institutions in Jiangsu Province
- high-end talent plan of Yangzhou university
- Jiangsu Key Laboratory of Environmental Material and Environmental Engineering [K11032]
In this article, ternary coaxial hierarchical nanofibers are prepared by a simple, repeatable, and scalable method. Polyaniline (PANI) is in-situ polymerized on multiwalled carbon nanotubes (MWCNT) to form PANI/MWCNT. Subsequently, manganese dioxide (MnO2) in-situ grows on PANI/MWCNT nanofibers to form ternary hierarchical nanofibers MnO2/PANI/MWCNT. The electrochemical performance of MnO2/PANI/MWCNT is investigated using cyclic voltammetry (CV), galvanostatic charge-discharge measurement, and electrochemical impedance spectroscopy. The results show that as-prepared ternary hierarchical nanofibers are all typical pseudo-capacitance capacitors. Compared with MWCNT, PANI nanofibers, and PANI/MWCNT composite nanofibers, the specific capacitance of MnO2/PANI/MWCNT composites exhibits the highest capacitance of 348.5 F g(-1) at 1 A g(-1), and 882% of which can still be maintained after 2000 consecutive cycles. The electrochemical measurements demonstrate that PANI layer and nanoflaky MnO2 can increase the specific capacitance of MWCNT. More important, MnO2 in-situ growth on PANI layer can effectively retain the structure of composites and improve the long-term cycle stability, which is conducive to obtain the new-type portable energy storage devices. (C) 2016 Elsevier Ltd. All rights reserved.
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