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Guo, Qiaohui ; Zhou, Xiaoping ; Li, Xiaoyan ; Chen, Shuiliang ; Agarwal, Seema ; Greiner, Andreas ; Hou, Haoqing:
Supercapacitors based on hybrid carbon nanofibers containing multiwalled carbon nanotubes.
In: Journal of Materials Chemistry.
Bd. 19
(2009)
Heft 18
.
- S. 2810-2816.
ISSN 1364-5501
DOI: https://doi.org/10.1039/B820170F
Abstract
Hybrid carbon nanofibers containing multiwalled carbon nanotubes (CNTs) were produced by electrospinning CNTs suspended in a solution of polyacrylonitrile in N,N-dimethylformamide, followed by carbonization and activation using a hydroperoxide-water steam mixture at 650 degrees C. Transmission electron microscopy and scanning electron microscopy were used to observe the morphology of the CNT-embedded carbon nanofibers. The specific surface area of the nanofibers was measured using the Brunauer-Emmett-Teller method. The electrochemical properties of the nanofibers were characterized by cyclic voltammetry and galvanotactic charge/discharge in 1MH(2)SO(4) electrolyte. The specific capacitance of electric double-layer capacitors containing CNT-embedded carbon nanofibers as electrodes reached 310 F g(-1), which is almost double that obtained for capacitors containing virgin carbon nanofibers as electrodes. The CNTs embedded in the carbonized electrospun nanofibers provide improved conductive pathways for charge transfer in the electrodes and therefore lead to a significantly enhanced specific capacitance.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | ELECTROCHEMICAL STORAGE; POLYMER NANOFIBERS; POLYACRYLONITRILE; FIBERS; WEBS; ELECTRODES; ENERGY; PITCH |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Makromolekulare Chemie II > Lehrstuhl Makromolekulare Chemie II - Univ.-Prof. Dr. Andreas Greiner Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Makromolekulare Chemie II |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 08 Apr 2015 12:09 |
| Letzte Änderung: | 07 Jul 2022 10:37 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/9608 |