Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (24): 2516-2522. Previous Articles     Next Articles

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碳化钙骨架碳的N, O功能化及其电化学性能

郑丽萍,王先友*,安红芳,陈权启,刘黎,白俐   

  1. (湘潭大学化学学院环境友好化学与应用教育部重点实验室 湘潭 411105)
  • 收稿日期:2009-11-24 修回日期:2010-08-20 出版日期:2010-12-28 发布日期:2010-10-26
  • 通讯作者: 王先友 E-mail:wxianyou@yahoo.com

Surface N, O Functionalization of Calcium Carbide-derived Carbon and Its Electrochemical Performance

ZHENG Li-Ping, WANG Xian-You, AN Hong-Fang, CHEN Quan-Qi, LIU Li, BAI Li   

  1. (School of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Hunan 411105)
  • Received:2009-11-24 Revised:2010-08-20 Online:2010-12-28 Published:2010-10-26

Porous CaC2-derived carbon (CCDC) was synthesized by one-step route from CaC2 in a freshly prepared chlorine environment at low temperature. CCDC was oxidized by HNO3 and treated with urea or melamine by carbonization at 950 ℃ in an inert atmosphere, then nitrogen-enriched CCDC was obtained. The samples were characterized by Fourier infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and elemental analysis. It found that the surface texture and chemistry activation of CCDC are improved by the containing nitrogen or oxygen functional groups preexisting on the surface. Electrochemical performances of supercapacitors using modified CCDC as electrodes were studied by cyclic voltammery, galvanostatic charge/discharge and cycle life measurements. The results showed that the HNO3, urea and melamine modified CCDC revealed enhanced capacitances of 181.5, 210.8 and 225.4 F•g-1 in 1 mol/L H2SO4, which increase by 17.3%, 36.3% and 45.7% compared with the initial carbon, respectively. Furthermore, the capacitance of supercapacitors are nearly no change after 5000 cycles.

Key words: carbide-derived carbon, functionalization, surface functional group, supercapacitor

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