کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1286231 | 973179 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Supercapacitive behaviors and their temperature dependence of sol–gel synthesized nanostructured manganese dioxide in lithium hydroxide electrolyte Supercapacitive behaviors and their temperature dependence of sol–gel synthesized nanostructured manganese dioxide in lithium hydroxide electrolyte](/preview/png/1286231.png)
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