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|Title:||Self-assembly of well-ordered whisker-like manganese oxide arrays on carbon fiber paper and its application as electrode material for supercapacitors|
|Citation:||Luo, Y., Jiang, J., Zhou, W., Yang, H., Luo, J., Qi, X., Zhang, H., Yu, D.Y.W., Li, C.M., Yu, T. (2012-05-07). Self-assembly of well-ordered whisker-like manganese oxide arrays on carbon fiber paper and its application as electrode material for supercapacitors. Journal of Materials Chemistry 22 (17) : 8634-8640. ScholarBank@NUS Repository. https://doi.org/10.1039/c2jm16419a|
|Abstract:||Self-assembled well-ordered whisker-like manganese dioxide (MnO 2) arrays on carbon fiber paper (MOWAs) were synthesized via a simple in situ redox replacement reaction between potassium permanganate (KMnO 4) and carbon fiber paper (CFP) without any other oxidant or reductant addition. The CFP serves as not only a sacrificial reductant and converts aqueous permanganate (MnO 4 -) to insoluble MnO 2 in this reaction, but also a substrate material and guarantees MnO 2 deposition on the surface. The electrochemical properties were examined by cyclic voltammograms (CV), galvanostatic charge/discharge, and electrochemical impedance spectroscopy (EIS) in a three-electrode cell. According to the CV results, the ordered MOWAs yield high-capacitance performance with specific capacitance up to 274.1 F g -1 and excellent long cycle-life property with 95% of its specific capacitance kept after 5000 cycles at the current density of 0.1 A g -1. The high-performance hybrid composites result from a synergistic effect of large surface area and high degree of ordering of the ultrathin layer of MnO 2 nanowhisker arrays, combined with the flexible CFP substrate and can offer great promise in large-scale energy storage device applications. © The Royal Society of Chemistry 2012.|
|Source Title:||Journal of Materials Chemistry|
|Appears in Collections:||Staff Publications|
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