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A novel three-dimensional manganese dioxide electrode for high performance supercapacitors.
- Source :
-
Journal of Power Sources . Mar2016, Vol. 308, p141-148. 8p. - Publication Year :
- 2016
-
Abstract
- Development of MnO 2 based electrode materials for supercapacitor application with high comprehensive electrochemical performance, such as high capacitance, superior reversibility, excellent stability, and good rate capability, is still a tremendous challenge. In this work, a distinctive interwoven three-dimensional (3D) structure electrode with ultra-thin 2D graphene nanosheet decorated on the surface of 1D C/TiC nanowire array is built as the support to immobilize MnO 2 nanoflakes (MnO 2 -Graphene nanosheet-C/TiC nanowire array, denoted as MGCT). Compared with the normal 1D core/shell structure, this novel 3D architecture can dramatically not only increase the surface area for MnO 2 loading but also facilitate the ion and electron transfer. The electrochemical performance of the as-prepared 3D MnO 2 electrode is evaluated by cyclic voltammetrys, galvanostatic charging-discharging tests and electrochemical impedance spectroscopy, high specific capacitance (856 F g −1 at 2 A g −1 ), good rate capability (69.1% capacitance retention at 40 A g −1 vs 2 A g −1 ), superior reversibility, and cycling stability (85.7% capacitance retention after 10,000 cycles at 10 A g −1 ) are obtained, suggesting that this novel structure can offer a new and appropriate idea for obtaining high-performance supercapacitor electrode materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03787753
- Volume :
- 308
- Database :
- Academic Search Index
- Journal :
- Journal of Power Sources
- Publication Type :
- Academic Journal
- Accession number :
- 113008010
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2016.01.076