Supercapacitive performance of hierarchical porous carbon microspheres prepared by simple one-pot method
Supercapacitive performance of hierarchical porous carbon microspheres prepared by simple one-pot method
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DOI：
10.1016/j.jpowsour.2013.12.091
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发表时间：
2014-05
影响因子：
9.2
通讯作者：
Qinglan Zhao;Xian-you Wang;Chun Wu;J. Liu;Hao Wang;Jiao Gao;Youwei Zhang;H. Shu
中科院分区：
文献类型：
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作者：
Qinglan Zhao;Xian-you Wang;Chun Wu;J. Liu;Hao Wang;Jiao Gao;Youwei Zhang;H. Shu
以糠醇为碳源，通过简单的一锅法制备了多级孔碳微球（HPCMS）。 HPCMS 通过扫描电子显微镜 (SEM)、透射电子显微镜 (TEM) 和 77 K 氮气吸附/解吸等温线、循环伏安法 (CV)、恒电流充电/放电测试、电化学阻抗谱 (EIS) 和 6 M KOH 中的循环寿命测量进行表征。结果表明，通过调节糠醇/原硅酸四乙酯的比例制备的所有 HPCMS 样品均具有三维定制的孔结构，具有独特的微孔、介孔和大孔系统。特别是，摩尔比为2/1（糠醇/原硅酸四乙酯）制备的HPCMS-2显示出最大比表面积为709 m2g−1，HPCMS-2电极在1 A g−1电流密度下比电容高达221 F g−1。使用HPCMS-2作为活性材料的超级电容器表现出高比电容和优异的循环稳定性，在0.5 A g−1的充放电电流密度下表现出56 F g−1的比电容。此外，HPCMS-2超级电容器在5000 W kg−1的功率密度下可提供6.1 Wh kg−1的高能量密度，揭示了超级电容器的广阔应用前景。
The hierarchical porous carbon microspheres (HPCMSs) using furfuryl alcohol as carbon resource have been prepared by a simple one-pot method. The HPCMSs are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption/desorption isotherm at 77 K, cyclic voltammetry (CV), galvanostatic charge/discharge tests, electrochemical impedance spectroscopy (EIS) and cycle life measurements in 6 M KOH. The results show that all the HPCMSs samples, which can be fabricated by adjusting the ratio of furfuryl alcohol/tetraethyl orthosilicate, possess three-dimensionally tailored pore structures with unique micro-, meso- and macroporous systems. Particularly, the HPCMS-2 prepared at the mole ratio of 2/1 (furfuryl alcohol/tetraethyl orthosilicate) shows the largest specific surface area of 709 m2g−1, and the HPCMS-2 electrode owns specific capacitance as high as 221 F g−1at the current density of 1 A g−1. The supercapacitor using HPCMS-2 as the active material shows high specific capacitance and excellent cycle stability, which exhibits a specific capacitance of 56 F g−1at the charge/discharge current density of 0.5 A g−1. Furthermore, the HPCMS-2 supercapacitor delivers high energy densities of 6.1 Wh kg−1at the power density of 5000 W kg−1, revealing a promising application in supercapacitors.