Synthesis and electrochemical performance of N-doped carbon aerogels with super-high specific surface area

被引：1

作者：

Chang, Lijuan ^{[1
,2
]}

Yuan, Lei ^{[2
]}

Fu, Zhibing ^{[2
]}

Wei, Jianjun ^{[1
]}

Tang, Yongjian ^{[2
]}

Wang, Chaoyang ^{[2
]}

机构：

[1] Institute of Atomic and Molecular Physics, Sichuan University

[2] Science and Technology on Plasma Physics Laboratory, Research Centre of Laser Fusion, China Academy of Engineering Physics

来源：

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2013年 / 25卷 / 10期

关键词：

CO[!sub]2[!/sub] activation; Cycle stability; Nitrogen functionalities; Specific capacitance; Specific surface area;

D O I：

10.3788/HPLPB20132510.2621

中图分类号：

学科分类号：

摘要：

Activated N-doped carbon aerogel (N-ACA) is synthesized by the sol-gel polycondensation of resorcinol with formaldehyde using the melamine as nitrogen source, and then the carbon derivative being activated in CO2 flow. The surface morphology and porous structure are analyzed using scanning electron microscopy (SEM) and N2 adsorption at 77 K. The contained nitrogen of surface and monolith is tested by X-ray photoelectron spectroscopy (XPS) and elemental analysis. The electrochemical performances of N-dope carbon aerogels as electrodes are confirmed using constant-current charge-discharge test (GV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). It reveals that the rich porous structure and the chemical state of nitrogen functionalities have crucial effect on the electrochemical performance of the electric double-layer capacitors. The appropriate CO2 activation can increase the number of micropores and mesopores as well as the specific surface area (4082 m2·g-1). Furthermore, the presence of amount of pyrrolic nitrogen is reinforced in the electron donor capacity. The specific capacitance of N-ACA electrode is up to 211.9 F·g-1 and retains about 98% after 500 charge-discharge cycles.

引用

页码：2621 / 2626

页数：5

共 22 条

[11] Kang K.Y., Hong S.J., Lee B.I., Et al., Enhanced electrochemical capacitance of nitrogen-doped carbon gels synthesized by microwave-assisted polymerization of resorcinol and formaldehyde, Electrochemistry Communications, 10, 7, pp. 1105-1108, (2008)
[12] Zulamita Z.B., Francisco C.M., Carlos M.C., Et al., Preparation, surface characteristics, and electrochemical double-layer capacitance of KOH-activated carbon aerogels and their O- and N-doped derivatives, Journal of Power Sources, 219, pp. 80-88, (2012)
[13] White R.J., Noriko Y., Markus A., Et al., A sustainable synthesis of nitrogen-doped carbon aerogels, Green Chemistry, 13, 9, pp. 2428-2434, (2011)
[14] Hao G., Mi J., Li D., Et al., A comparative study of nitrogen-doped hierarchical porous carbon monoliths as electrodes for supercapacitors, New Carbon Materials, 26, 3, pp. 197-203, (2011)
[15] Yang R.T., Adsorbents: Fundamentals and Application, pp. 8-17, (2003)
[16] Jurewicz K., Babel K., Ziolkowski A., Et al., Ammoxidation of active carbons for improvement of supercapacitor characteristics, Electrochimica Acta, 48, 11, pp. 1491-1498, (2003)
[17] Lee Y.H., Lee Y.F., Chang K.H., Et al., Novel synthesis of N-doped porous carbons from collagen for electrocatalytic production of H<sub>2</sub>O<sub>2</sub>, Electrochemistry Communications, 13, pp. 50-53, (2011)
[18] Jurewicz K., Babel K., Pietrzak R., Et al., Capacitance properties of multi-walled carbon nanotubes modified by activation and ammoxidation, Carbon, 44, 12, pp. 2368-2375, (2006)
[19] Fuertes A.B., Pico F., Rojo J.M., Influence of pore structure on electric double-layer capacitance of template mesoporous carbons, Journal of Power Sources, 133, 2, pp. 329-336, (2004)
[20] Wang X., Liu L., Wang X., Et al., Preparation and performances of carbon aerogel microspheres for the application of supercapacitor, Journal of Solid State Electrochemistry, 15, 4, pp. 646-648, (2011)

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