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

[1] Kim N.D., Kim W., Joo J.B., Et al., Electrochemical capacitor performance of N-doped mesoporous carbons prepared by ammoxidation, Journal of Power Sources, 180, 1, pp. 671-672, (2008)
[2] Liu D., Shen J., Li Y., Et al., Pore structures of carbon aerogels and their effects on electrochemical supercapacitor performance, Acta Physico-Chimica Sinica, 28, 4, pp. 843-849, (2012)
[3] Pognon G., Brousse T., Belanger D., Effect of molecular grafting on the pore size distribution and the double layer capacitance of activated carbon for electrochemical double layer capacitors, Carbon, 49, 4, pp. 1340-1348, (2011)
[4] Li W., Probstle H., Fricke J., Electrochemical behavior of mixed CmRF based carbon aerogels as electrode materials for supercapacitors, Journal of Non-Crystalline Solids, 325, 1-3, pp. 1-5, (2003)
[5] Wang J., Yang X., Wu D., Et al., The porous structures of activated carbon aerogels and their effects on electrochemical performance, Journal of Power Sources, 185, 1, pp. 589-594, (2008)
[6] Yuan Q., Wang C., Fu Z., Et al., Effects of CO<sub>2</sub> temperature on carbon aerogels porous structures and hydrogen absorption capacity, High Power Laser and Particle Beams, 23, 7, pp. 1853-1856, (2011)
[7] Xu Z., Ji T., Zhao L., Et al., Restructured carbon aerogels and their electrochemical performances, Acta Physico-Chimica Sinica, 28, 2, pp. 361-366, (2012)
[8] Maldonado-Hodar F.J., Ferro-Garcia M.A., Rivera-Utrilla J., Et al., Synthesis and textural characteristics of organic aerogels, transition metal containing organic aerogels and their carbonized derivatives, Carbon, 37, 8, pp. 1199-1205, (1999)
[9] Chang H., Guang Y., Shu C., Resorcinol formaldehyde aerogels prepared by supercritical acetone drying, Journal of Non Crystalline Solids, 271, 1-2, pp. 167-170, (2000)
[10] Wu D., Fu R., Zhang S., Et al., Preparation of low-density carbon aerogels by ambient pressure drying, Carbon, 42, 10, pp. 2033-2039, (2004)

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