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- Title
Synthesis and high electrochemical performance of polyaniline/MnO-coated multi-walled carbon nanotube-based hybrid electrodes.
- Authors
Kim, Ki-Seok; Park, Soo-Jin
- Abstract
Multi-layered electrodes which consist of polyaniline (PANI)/manganese dioxide (MnO)-multi-walled carbon nanotubes (MWNTs) are prepared as the electrode materials for supercapacitors. MnO-MWNTs are made by the in situ direct coating method to deposit MnO onto MWNTs; the core/shell structure of multi-layered fibrous electrodes can also be obtained by PANI coating onto the MnO-MWNTs. The effect of PANI coating on the electrochemical performance and cyclic stability of MnO-MWNTs is investigated. From the cyclic voltammograms, the PANI/MnO-MWNTs show remarkably enhanced specific capacitance and cycle stability compared to MnO-MWNTs, where the highest specific capacitance (350 F/g) is obtained at a current density of 0.2 A/g for the PANI/MnO-MWNTs as compared to 92 F/g for pristine MWNTs and 306 F/g for MnO-MWNTs. This indicates that the improved electrochemical performance of PANI/MnO-MWNTs is due to the enhanced electrical properties by nano-scale-coated MnO onto MWNTs and the PANI coating that leads to the increased cycle stability by delaying the dissolution of MnO during charge/discharge tests.
- Subjects
ELECTRODES; POLYANILINES; CARBON nanotubes; SUPERCAPACITORS; MANGANESE dioxide electrodes
- Publication
Journal of Solid State Electrochemistry, 2012, Vol 16, Issue 8, p2751
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-012-1694-7