Three-Dimensional Macroporous Carbon/Fe3O4-Doped Porous Carbon Nanorods for High-Performance Supercapacitor

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• 作者：Li Wang ; Jie Yu ; Xuantong Dong ; Xia Li ; Yingzhen Xie ; Shouhui Chen ; Ping Li ; Haoqing Hou ; Yonghai Song
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：March 7, 2016
• 年：2016
• 卷：4
• 期：3
• 页码：1531-1537
• 全文大小：479K
• ISSN：2168-0485

文摘

Supercapacitors are considered as potential innovation for energy storage owing to their long charge–discharge life and high power density. Herein, a simple and industry-scalable approach was developed to prepare the hybrid of Fe₃O₄-doped porous carbon nanorods (Fe₃O₄-DCN) supported by three-dimensional (3D) kenaf stem-derived macroporous carbon (KSPC) for high-performance supercapacitor, which was prepared via pyrolyzing the iron fumarate metal organic frameworks (MIL-88A, MIL stands for Materials from Institut Lavoisier)/3D-KSPC. The resulted 3D-KSPC/Fe₃O₄-DCN nanocomposites were carefully characterized by various techniques including scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray powder diffraction and N₂ adsorption/desorption isotherms. The 3D-KSPC/Fe₃O₄-DCN were employed as a promising electrode materials of supercapacitors by combining the advantage of Fe₃O₄-DCN (e.g., high specific capacitance, good rate capability and excellent cycling stability) with the superiority of 3D-KSPC (e.g., large specific surface area and hierarchical pores and high conductivity), exhibiting a high specific capacitance of 285.4 F g^–1 at the current density of 1 A g^–1. The capacitance was kept at 220.5 F g^–1 after 5000 cycles at 2 A g^–1, indicating outstanding cycle performance. This work might provide a new strategy to prepare nanostructures on 3D-KSPC for future applications.