Polypyrrole-coated α-MoO3 nanobelts with good electrochemical performance as anode materials for aqueous supercapacitors
Polypyrrole-coated α-MoO3 nanobelts with good electrochemical performance as anode materials for aqueous supercapacitors
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聚吡咯涂层α-MoO3纳米带作为水系超级电容器阳极材料具有良好的电化学性能
DOI：
10.1039/c3ta12902k
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Wu, Yuping
中科院分区：
文献类型：
--
作者：
Liu, Yu;Zhang, Baihe;Wu, Yuping
采用简单的原位聚合法制备了聚吡咯包覆的三氧化钼（α-MoO 3）纳米带纳米复合材料。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）和电化学测试等手段对纳米复合材料的结构、形貌和电化学性能进行了研究。结果表明，聚吡咯作为导电基体和包覆剂，有效地提高了MoO 3纳米带的导电性，抑制了循环过程中钼离子的溶解。以PPy@MoO3纳米复合材料为阳极、活性炭为阴极、0.5 M K2 SO 4水溶液为电解质的超级电容器与纯MoO 3相比具有更好的倍率性能和优异的循环性能。
A nanocomposite of molybdenum trioxide (alpha-MoO3) nanobelts coated with polypyrrole has been fabricated by a simple in situ polymerization route. The structure, morphology and electrochemical performance of the nanocomposite were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and electrochemical measurements. It was found that the polypyrrole acted as a conducting matrix and a coating agent, which effectively improves the conductivity of the MoO3 nanobelts and inhibits the dissolution of molybdenum ions during cycling. The supercapacitor based on the PPy@MoO3 nanocomposite as the anode, activated carbon as the cathode and 0.5 M K2SO4 aqueous solution as the electrolyte exhibits better rate capability as well as excellent cycling performance compared to the virginal MoO3.