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Highly conductive, twistable and bendable polypyrrole-carbon nanotube fiber for efficient supercapacitor electrodes

机译:高导电,可扭曲和可弯曲的聚吡咯-碳纳米管纤维,用于高效超级电容器电极

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摘要

Carbon nanotubes (CNTs) are a promising candidate for flexible and wearable electronic applications. Here, we report a conductive, twistable and bendable CNT composite fiber with core-shell structure for efficient supercapacitor electrode, where the CNT bundles are coated with a thin layer of polypyrrole (PPy) (denoted as PPy@CNT). The electrochemical properties of the fiber electrode depend on the content and distribution of the PPy. The PPy@CNT fiber exhibits a high specific capacitance of 350 F g(-1) and high stability in cyclic testing. The outstanding electrochemical performance originates from the high conductivity of the coreshell structured PPy@CNT composite, which makes charge transfer easily between PPy and CNTs. The PPy@CNT fiber is also stable under bending and twisting.
机译:碳纳米管(CNT)是柔性和可穿戴电子应用的有前途的候选者。在这里,我们报告了一种具有核-壳结构的导电,可扭曲和可弯曲的CNT复合纤维,用于高效的超级电容器电极,其中CNT束覆盖有一层薄薄的聚吡咯(PPy)(表示为PPy @ CNT)。纤维电极的电化学性质取决于PPy的含量和分布。 PPy @ CNT纤维在循环测试中显示出350 F g(-1)的高比电容和高稳定性。出色的电化学性能源于核壳结构的PPy @ CNT复合材料的高电导率,这使得电荷易于在PPy和CNT之间转移。 PPy @ CNT纤维在弯曲和扭曲下也很稳定。

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