Synthesis and electrical conductivity of FeCl3 exfoliated graphite intercalation compounds
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P578.1+ 6; O44

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    Abstract:

    The FeCl3 graphite intercalation compounds (FeCl3-GICs) have aroused special attention for their highly electrical conductivity and stability. In this paper, FeCl3-exfoliated graphite intercalation compounds (Abs. FeCl3-EGICs) have been synthesized under the protection of nitrogen gas with the melting salt method. The experimental results show that pure stage-I FeCl3-EGICs can be synthesized at 360℃ for 12 hours, and pure stage-II FeCls3-EGICsat 460℃ for 12 hours when FeCl3 is excessive. In addition, the electrical conductivity of FeCl3-EGICs was measured at different temperatures, the number of stage Ⅰ EGICs is 7.513×10 6S·m-1 at 297K which is 3.7 times larger than pristine exfoliated graphite, and stage Ⅱ is 6.87×10 6 S.m-1at the same temperature which is 3.4 times larger. The conductance of FeCl3-EGICs is similar to that of metals, and its electrical resistivity shows a linear relation with the temperature from 297K to decomposition temperature. The resistivityincreases with temperature, with the mechanism being phonon scattering.

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曹宏 马恩宝 王学华 宾晓蓓 李阳艳,2005,FeCl3膨胀石墨层间化合物制备及电导性能研究[J].岩石矿物学杂志,24(6):629~632. CAO Hong, MA En-bao, WANG Xue-hua, BIN Xiao-bei, LI Yang-yan,2005,Synthesis and electrical conductivity of FeCl3 exfoliated graphite intercalation compounds[J]. Acta Petrologica et Mineralogica,24(6):629~632.

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  • Received:July 30,2005
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