Porous Fe-Mn-O nanocomposites: Synthesis and supercapacitor electrode application

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• 作者：Guoxing Zhu^a ; ^c ; ^{zhuguoxing@ujs.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Jing Yang^a ; Yuanjun Liu^b ; Xulan Xie^a ; Zhenyuan Ji^a ; Jinxiu Yin^a ; Xiaoping Shen^a ; ^{xiaopingshen@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Oxide ; Fe-Mn-O ; Porous structure ; Capacitors ; Electrodes
• 刊名：Progress in Natural Science
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：26
• 期：3
• 页码：264-270
• 全文大小：2512 K

文摘

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.