Advanced electrochemical energy storage supercapacitors based on the flexible carbon fiber fabric-coated with uniform coral-like MnO2 structured electrodes
Advanced electrochemical energy storage supercapacitors based on the flexible carbon fiber fabric-coated with uniform coral-like MnO2 structured electrodes
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DOI：
10.1016/j.cej.2016.10.012
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发表时间：
2017-02-01
影响因子：
15.1
通讯作者：
Alonso-Marroquin, Fernando
中科院分区：
文献类型：
--
作者：
Cakici, Murat;Reddy, Kakarla Raghava;Alonso-Marroquin, Fernando
基于碳纤维织物/MnO 2杂化材料，将MnO 2均匀包覆在碳纤维织物（CFF）表面，开发了一种新型高效的超级电容器电极材料。采用绿色水热方法用珊瑚状MnO 2纳米结构功能化CFF，以提高混合复合材料的赝电容性能。这些CFF/MnO 2复合材料可用作高性能电化学超级电容器应用的优异柔性电极。利用FE-SEM、XRD、XPS、拉曼光谱等技术对复合材料的形貌、结构和结晶性能进行了分析。通过循环伏安法、恒电流充放电测试和交流阻抗谱等测试手段研究了其电化学性能。在三电极系统中，CV测试显示在1 A/g的电流密度下具有467 F/g的上级比电容，电容保持率为99.7%，并且在5000次循环后库仑效率仍高达993%，证明了出色的电化学循环稳定性。此外，用CFF/MnO 2制造的高性能器件在0.175 kW h/kg的功率密度下表现出20 W h/kg的优异能量密度。这些新的电极材料可能是潜在的候选人，在实际和大规模的能量存储系统的应用。(C)2016爱思唯尔B. V.保留所有权利。
The novel and efficient electrode materials have been developed for supercapacitor applications based on carbon fiber fabric/MnO2 hybrid materials, in which MnO2 was uniformly coated on the surface of carbon fiber fabric (CFF). A green hybrothermal method was used to functionalize CFF with coral-like MnO2 nanostructures to improve the pseudocapacitance properties of the hybrid composites. These CFF/MnO2 composites are used as excellent flexible electrodes for high-performance electrochemical super capacitors applications. The morphological, structural and crystalline properties of composites were analysed by using various techniques such as FE-SEM, XRD, XPS, and Raman spectroscopy, respectively. The electrochemical performance was examined by cyclic voltammetry (CV), galvanostatic charge-discharge tests and electrochemical impedance spectroscopy (EIS). In a three-electrode system, the CV tests reveal the superior specific capacitance of 467 F/g at a current density of 1 A/g with capacitance retention of 99.7% and the columbic efficiency remains as high as 993% after 5000 cycles, demonstrating an outstanding electrochemical cyclic stability. In addition, high-performance device fabricated with CFF/MnO2 demonstrated excellent energy density of 20 W h/kg at a power density of 0.175 kW h/kg. These novel electrode materials could be potential candidate for applications in practical and large-scale energy storage systems. (C) 2016 Elsevier B.V. All rights reserved.