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Supercapacitors based on hybrid carbon nanofibers containing multiwalled carbon nanotubes

Title data

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. Vol. 19 (2009) Issue 18 . - pp. 2810-2816.
ISSN 0959-9428
DOI: https://doi.org/10.1039/B820170F

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: ELECTROCHEMICAL STORAGE; POLYMER NANOFIBERS; POLYACRYLONITRILE; FIBERS; WEBS; ELECTRODES; ENERGY; PITCH
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 08 Apr 2015 12:09
Last Modified: 08 Apr 2015 12:09
URI: https://eref.uni-bayreuth.de/id/eprint/9608