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| 1 | Porous Fe-Mn-O nanocomposites:Synthesis and supercapacitor electrode application显示文摘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. | Guoxing Zhu Jing Yang Yuanjun Liu Xulan Xie Zhenyuan Ji Jinxiu Yin Xiaoping Shen | 2016 | Progress in Natural Science:Materials International2016，26，3： | 0 |
| 2 | Direct growth of Fe_3O_4-MoO_2 hybrid nanofilm anode with enhanced electrochemical performance in neutral aqueous electrolyte显示文摘To enhance the electrochemical energy storage performance of supercapacitors(SCs), the current researches are general directed towards the cathode materials. However, the anode materials are relatively less studied. In the present work, Fe_3O_4-MoO_2(FO-MO) hybrid nano thin film directly grown on Ti substrate is investigated, which is used as high-performance anode material for SCs in Li_2SO_4 electrolyte with the comparison to pristine Fe_3O_4 nanorod array. The areal capacitance of FO-MO hybrid electrode was initially found to be 65.0 m F cm^(-2)at 2 m Vs^(-1)and continuously increased to 260.0% after 50 cycles of activation. The capacitance values were considerably comparable or higher than many reported thinfilm iron oxide-based anodes in neutral electrolyte. With the protection of MoO_2 shell, the FO-MO electrode developed in this study also exhibited excellent cyclic stability(increased to 230.8% after 1000cycles). This work presents a promising way to improve the electrochemical performance of iron oxidebased anodes for SCs. | Ruizhi Li Xin Ba Yimeng Wang Wenhua Zuo Chong Wang Yuanyuan Li Jinping Liu | 2016 | Progress in Natural Science:Materials International2016，26，3： | 0 |
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