Citation: XU Zi-Jie, JI Tao, ZHAO Lei, WANG Wei-Yan, YANG Chun-Yan, GAN Li-Hua. Restructured Carbon Aerogels and Their Electrochemical Performances[J]. Acta Physico-Chimica Sinica, ;2012, 28(02): 361-366. doi: 10.3866/PKU.WHXB201112063 shu

Restructured Carbon Aerogels and Their Electrochemical Performances

1.
Department of Chemistry, Tongji University, Shanghai 200092, P. R. China

Received Date: 26 September 2011
Available Online: 6 December 2011
Fund Project: 国家自然科学基金(20973127)资助项目 (20973127)

Restructured carbon aerogels (RCAs) were obtained by annealing carbon aerogels (CAs) in sodium melt at 800 °C for 3 h and the differences in electrochemical performance between the resultant CAs and RCAs were studied. X-ray diffraction (XRD), Raman scattering spectra, gas physisorption (BET), transmission electron microscopy (TEM), and electrochemical impedance spectroscopy (EIS) were used to probe the structures of CAs and RCAs. The studies indicated that the amorphous carbon particles were rearranged in sodium melt, in which the surface area of the resultant RCAs was 48% larger than that of CAs. Two concentrated pore distributions were observed at the apertures of 2 and 4 nm in RCAs. The pore volume at apertures below 10 nm is 30% of the total volume in RCAs, which is 3 times as many as that in CAs. Electrochemical performances of both CAs and RCAs were investigated and the results indicate that the inner resistance of RCAs is only 45% of that in the sample of CAs. The results also indicate that RCAs display od performance in capacitance characteristics.
- Carbon aerogel,
- Sodium melt,
- Restructure,
- Electrochemical impedance spectroscopy
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