کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1286231 | 973179 | 2007 | 5 صفحه PDF | دانلود رایگان |

In the present work, a nanostructured manganese dioxide material was synthesized by a sol–gel method starting with manganese acetate (MnAc2·4H2O) and citric acid (C6H8O7·H2O) raw materials, and characterized by X-ray diffraction, infrared spectroscopic and transmission electron microscope techniques. The electrochemical properties and the influence of temperature on supercapacitive behaviors of the nano-MnO2 electrode in 1 M LiOH electrolyte were investigated using electrochemical methods. Experimental results show that the MnO2 electrode can exhibit an excellent pseudocapacitive behavior in 1 M LiOH electrolyte, and a high specific capacitance of 317 F g−1 can be obtained at a charge/discharge current rate of 100 mA g−1 and at the temperature of 25 °C. We found that temperature has a crucial influence on the discharge specific capacitance of the electrode. The specific capacitance at 25 °C is higher than that at 15 or 35 °C.
Journal: Journal of Power Sources - Volume 172, Issue 2, 25 October 2007, Pages 1007–1011