کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
76134 | 49132 | 2008 | 5 صفحه PDF | دانلود رایگان |
Mesoporous manganese dioxide (MnO2) films have been successfully electrodeposited from hexagonal structured lyotropic liquid crystalline phases with polyoxyethnlene surfactant. The liquid crystalline templates are characterized by low-angle X-ray diffraction (XRD) and polarized-light optical microscopy (POM). The mesoporous MnO2 films are characterized by low-angle XRD, wide-angle XRD, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The mesoporous MnO2 films heat-treated at 200 °C were characterized by cyclic voltammetry (CV) in 0.5 M Na2SO4 electrolyte for supercapacitor application. The mesoporous MnO2 films exhibit ideal capacitive behavior between −0.1 and 0.9 V, and a specific capacitance of 460 Fg−1 is obtained at the scan rate of 10 mV s−1. These results indicate that mesoporous MnO2 films electrodeposited from lyotropic liquid crystalline phases provide promising applications in supercapacitors.
Journal: Microporous and Mesoporous Materials - Volume 112, Issues 1–3, 1 July 2008, Pages 627–631