Porous Fe-Mn-O nanocomposites: Synthesis and supercapacitor electrode application |
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Authors: | Guoxing Zhu Jing Yang Yuanjun Liu Xulan Xie Zhenyuan Ji Jinxiu Yin and Xiaoping Shen |
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Institution: | a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China;a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212014, China;b School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212013, China;a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212016, China;a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212017, China;a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212018, China;a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212019, China |
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Abstract: | Transition metal oxide micro-/nanostructures demonstrate high potential applications in energy storage devices. Here, we report a facile synthesis of highly homogeneous oxide composites with porous structure via a coordination polymer precursor, which was prepared with the assistance of tartaric acid.The typical product, Fe-Mn-O composite was demonstrated here. The obtained Fe-Mn-O product was systemically characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, elemental mapping analysis, and X-ray photoelectron spectroscopy. It was demonstrated that the Fe-Mn-O nanocomposite shows interconnected porous structure, in which iron,manganese, and oxygen are uniformly distributed. In addition, the Fe-Mn-O nanocomposite was then fabricated as capacitor electrodes. Operating in an aqueous neutral solution, the Fe-Mn-O composite electrodes showed an wide working potential window from 0.2 to 1.0 V(vs. SCE), and a specific capacitance of 86.7 Fg~(-1)or 0.4 Fcm~(-2)at a constant current density of 1 Ag~(-1)with good cycle life. This study offers a new precursor approach to prepare porous metal oxide composites, which would be applied in energy-storage/conversion devices, catalysts, sensors, and so on. |
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Keywords: | Oxide Fe-Mn-O Porous structure Capacitors Electrodes |
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