Porous carbon nanosheets derived from Al-based MOFs for supercapacitors
Porous carbon nanosheets derived from Al-based MOFs for supercapacitors
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DOI：
10.1016/j.micromeso.2016.08.032
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发表时间：
2016-12-01
影响因子：
5.2
通讯作者：
Liu, Shucheng
中科院分区：
文献类型：
--
作者：
Liu, Yi;Xu, Jiao;Liu, Shucheng
在这项工作中，我们报告的多孔碳纳米片（CN）的制备通过碳化铝基金属有机框架（DUT-5）在700 ℃下，在惰性气体气氛下。所得氯化萘为二维纳米结构，具有高BET表面积（415.2 m2·g-1）和孔体积（0.99 cm 3·g-1）。在具有6 M KOH电解质的三电极配置中评价所合成的氯化萘的电化学性能。在电流密度为0.25、0.5、1、2和3 A g（-1）时，电容值分别为119、100、88、84和80 F g（-1）。最后，利用碳纳米管作为正负极制备了对称型超级电容器。在6 M KOH溶液中，电池的工作电压可扩展到1.5V，能量密度可达3.0Wh kg（-1），功率密度为1384 W kg（-1），显示了组装系统在实际应用中的潜力。(C)2016 Elsevier Inc. All rights reserved.
In this work, we report preparation of porous carbon nanosheets (CNs) through carbonization of an Al-based metal-organic frameworks (DUT-5) at 700 degrees C under an inert gas atmosphere. The obtained CNs shows a two-dimensional (2D) nanostructure, with a high BET surface area (415.2 m(2) g(-1)) and pore volume (0.99 cm(3) g(-1)). The electrochemical performance of the as-synthesized CNs was evaluated in a three-electrode configuration with 6 M KOH electrolyte. The capacitance values are calculated to be 119, 100, 88, 84 and 80 F g(-1), respectively, at current densities of 0.25, 0.5, 1, 2 and 3 A g(-1). Finally, the symmetric supercapacitors (SCs) were fabricated by utilizing the CNs as the positive and negative electrode. The working voltage of the SCs can be extended to 1.5 V in 6 M KOH and achieved an energy density up to 3.0 Wh kg(-1) at a power density of 1384 W kg(-1), indicating the potential of assembled system in practical application. (C) 2016 Elsevier Inc. All rights reserved.