FeCl3膨胀石墨层间化合物制备及电导性能研究
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P578.1+ 6; O44

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湖北省教育厅优秀中青年项目(2003B001),湖北省自然科学基金项目(2004ABA090)


Synthesis and electrical conductivity of FeCl3 exfoliated graphite intercalation compounds
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    摘要:

    在N2保护下用熔盐法合成了FeCl_3膨胀石墨层间化合物(简称FeCl_3-EGICs)。研究表明,在FeCl3过量、360℃、12h的条件下可得到纯一阶产物;460℃、12h为纯二阶。293K时,一阶FeCl3_EGICs的电导率为7.513×106S·m-1,二阶为6.87×106S·m-1,分别是原料膨胀石墨的3.7倍和3.4倍。在293K至分解温度范围内,FeCl3_EGICs具有金属电导特性,其电阻与温度间呈线性关系,随温度升高电阻增大,其机理为声子散射。

    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, et al, 2005. Synthesis and electrical conductivity of FeCl3 exfoliated graphite intercalation compounds[J]. Acta Petrologica et Mineralogica, 24(6): 629~632.

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  • 收稿日期:2005-07-30
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