Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1608902 | Journal of Alloys and Compounds | 2015 | 23 Pages |
Abstract
Hetero-structured manganese dioxide nanorods with α phase (α-MnO2) were prepared by a facile hydrothermal route at low temperature. X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption measurements were used to characterize the prepared hetero-structured α-MnO2 nanorods. Supercapacitive performance of the hetero-structured α-MnO2 nanomaterials as active electrode material was evaluated by cyclic voltammetry (CV) in alkaline medium. The MnO2 hetero-structure with 2 Ã 2 tunnels constructed from double chains of octahedral [MnO6] structure yield a significantly high specific capacitance of 298 Fgâ1 at 5 mV sâ1 and demonstrated a superior long term cyclic stability, with specific capacitance retention about 94% after 1000 cycles. The superior supercapacitive performance of the hetero-structured α-MnO2 electrode is due to its high specific surface area and unique hierarchy architecture which facilitate fast electron and ion transport.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Zafar Khan Ghouri, M. Shaheer Akhtar, Awan Zahoor, Nasser A.M. Barakat, Weidong Han, Mira Park, Bishweshwar Pant, Prem Singh Saud, Cho Hye Lee, Hak Yong Kim,