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科学通报  2011 

氧化石墨/聚吡咯复合材料的制备及其电化学性质

, PP. 1927-1933

Keywords: 氧化石墨,聚吡咯,纳米复合材料,电化学性能

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Abstract:

利用原位聚合制备了氧化石墨(graphiteoxide,GO)/聚吡咯(polypyrrole,PPy)纳米复合材料(GPYs),探讨了吡咯与GO的投料比对GPYs的结构以及电化学性能的影响.利用傅里叶红外光谱(FTIR)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)以及X-射线衍射(XRD)技术对复合材料的结构进行表征;利用循环伏安、恒电流充放电以及电化学阻抗技术测试复合材料的电化学性能.实验结果表明,当吡咯加入量较多时(GPYs20(吡咯/GO=8020)与GPYs50(吡咯/GO=5050))会导致复合材料中PPy和GO层的团聚,这会降低PPy在GPYs20与GPYs50中的比电容贡献值.当吡咯与GO的投料比低至2080时,复合材料中具有纳米纤维状形貌的PPy均匀分散于脱落的GO层表面/层内,所得到GPYs80的导电性得以提高.PPy在GPYs80的比电容贡献值(383F/g)比纯PPy(201F/g)高,表明GO和PPy之间存在协同效应.

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