| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1558182 | Nano Energy | 2013 | 10 Pages |
•Large-scale ITO nanowire array deposited with MnO2 has been synthesized.•MnO2 in the nanowires have mesopores of 2–3 nm in diameter.•MnO2/ITO NWs electrode shows excellent cycle life.
In this study, a novel mesoporous MnO2/ITO NWs nanocomposite is successfully fabricated by using a chemical vapor deposition on a titanium substrate, followed by electrodeposition through a lyotropic liquid crystalline with hexagonal phase and calcination in air. The heterostructure is characterized by low-angle XRD, wide-angle XRD, Raman spectroscopy, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Electrochemical measurements are carried out by cyclic voltammetry (CV) and chronopotentiometry in a 0.5 M Na2SO4 aqueous solution. The nanocomposite exhibits a significantly enhanced electrochemical performance and higher capacitance retention ratio, as compared to mesoporous manganese oxide (MnO2) film. From charge–discharge measurements, a specific capacitance of 821 F g−1 for the nanocomposite is achieved at a discharge current density of 1 A g−1 in potential ranges from −0.1 to 0.8 V. These characteristics allow the newly fabricated hybrid electrode to be widely used for various applications.
Graphical abstractMesoporous manganese dioxide on indium-tin oxide nanowiresFigure optionsDownload full-size imageDownload as PowerPoint slide
