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    题名 作者 年代 出处 被引量
1氧化石墨/聚吡咯复合材料的制备及其电化学性质显示文摘利用原位聚合制备了氧化石墨(graphite oxide,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=80:20)与GPYs50(吡咯/GO=50:50))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20:80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.韩永芹 丁兵 张校刚 2011科学通报2011,56,23:6
2Effect of feeding ratios on the structure and electrochemical performance of graphite oxide/polypyrrole nanocomposites显示文摘Graphite oxide (GO)/polypyrrole (PPy) nanocomposites (GPYs) were synthesized using in situ polymerization.The effect of the feeding ratios of pyrrole and GO on the structure and electrochemical performances of GPYs was investigated.The structure was characterized via Fourier-transform infrared spectroscopy,scanning electron microscopy,transmission electron microscopy and X-ray diffraction.The electrochemical performance was characterized via cyclic voltammetry,galvanostatic charge-discharge and electrochemical impedance spectroscopy.The results indicate that the more pyrrole is added to GO (with GO concentrations of 20% and 50%),the more agglomeration of both PPy and GO layers occurs.This is detrimental to the capacitance utilization of PPy.When the feeding ratio of GO:pyrrole is 80:20,PPys with nanofibrils are dispersed homogenously in/on the exfoliated layer of GO and the conductivity is enhanced.The capacitance utilization of PPy in a composite with a GO concentration of 80% (383 F/g) is higher than that of pure PPy (201 F/g),which indicates the presence of a synergistic effect between GO and PPy.HAN YongQin DING Bing ZHANG XiaoGang 2011Chinese Science Bulletin2011,56,26:5
3羧基化石墨烯基导电聚吡咯复合材料的超电容性能显示文摘制备了羧基化石墨烯基聚吡咯复合物(CG/ppy)修饰电极,用循环伏安法和交流阻抗法研究了修饰电极的电化学行为,并对修饰电极进行了恒流充放电以及循环稳定性测试。实验结果表明,CG/ppy显著提高了玻碳电极在电解液中的电流响应,降低了玻碳电极在电解液中的电阻,修饰电极的比电容可达584 F/g,且经过1000次循环后比电容仍保持初始值的81%。首次将羧基化石墨烯基聚吡咯应用于电化学领域,证实了CG/ppy修饰电极在该领域中有潜在的应用价值。李娜 肖迎红 鲁嘉 王延平 许崇正 杨小弟 2013应用化学2013,30,3:2
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