Synthesis and characterization of a novel tube-in-tube nanostructured PPy/MnO2/CNTs composite for supercapacitor
Synthesis and characterization of a novel tube-in-tube nanostructured PPy/MnO2/CNTs composite for supercapacitor
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DOI：
10.1016/j.materresbull.2012.11.014
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发表时间：
2013-02
影响因子：
5.4
通讯作者：
Juan Li;Tingli Que;Jianbin Huang
中科院分区：
文献类型：
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作者：
Juan Li;Tingli Que;Jianbin Huang
以甲基橙子（MO）/FeCl 3为反应性自降解软模板，以MnO 2和CNTs为无机基质，通过原位化学氧化聚合法制备了聚吡咯/二氧化锰/碳纳米管（PPy/MnO 2/CNTs）三元有机-无机复合材料。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HRTEM）、傅里叶变换红外光谱（FT-IR）和X射线衍射（XRD）对复合材料的形貌结构进行了表征。结果表明，PPy/MnO 2/CNTs复合材料具有典型的管中管结构：内管为CNTs，外管为模板合成的PPy。MnO 2纳米颗粒可以夹在内外小管之间的空间中，也可以直接锁在PPy管壁上。在-0.6 ~0.4V电位范围内进行1000次循环的循环伏安（CV）测试，复合材料具有良好的电化学可逆性，在恒流充放电实验中，电流密度为1Ag− 1时，其比电容达到402.7Fg− 1。
Ternary organic–inorganic complex of polypyrrole/manganese dioxide/carbon nanotubes (PPy/MnO2/CNTs) composite was prepared by in situ chemical oxidation polymerization of pyrrole in the host of inorganic matrix of MnO2and CNTs, using complex of methyl orange (MO)/FeCl3was used as a reactive self-degraded soft-template. The morphological structures of the composite were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopic (HRTEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD), respectively. All the results indicate that the PPy/MnO2/CNTs composite possesses the typical tube-in-tube nanostructures: the inner tubules are CNTs and the outer tubules are template-synthesized PPy. MnO2nanoparticles may either sandwich the space between the inner and outer tubules or directly latch onto the wall of the PPy tubes. The composite yields a good electrochemical reversibility through 1000 cycles’ cyclic voltammogram (CV) test in the potential range of −0.6 to 0.4V and its specific capacitance was up to 402.7Fg−1at a current density of 1Ag−1in galvanostatic charge–discharge experiment.