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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Ultra-flexible fibrous supercapacitors with carbon nanotube/polypyrrole brush-like electrodes
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Ultra-flexible fibrous supercapacitors with carbon nanotube/polypyrrole brush-like electrodes

机译：具有碳纳米管/聚吡咯刷状电极的超柔纤维超级电容器

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摘要

Ultra-flexible fibrous supercapacitors have been fabricated with oxidized carbon nanotubes grown on carbon fiber (OCNTF)/polypyrrole (PPY) brush-like electrodes, for the first time. Hierarchically mesoporous OCNTF serves as a large surface area-bearing electrically conductive substrate for the electropolymerization of PPY during the synthesis of OCNTF/PPY nanocomposites. Here, carbon fiber serves as a mechanical support for the OCNTF/PPY nanocomposite architecture and current collector for the supercapacitor. X-ray photoelectron spectroscopic analysis has revealed the presence of various oxygen-containing functional groups on the surface of OCNTF. The OCNTF/PPY supercapacitor exhibits a maximum gravimetric capacitance of 305 F g(-1) with a gravimetric energy density of 42 W h kg(-1) and a maximum volume specific capacitance of 14 950 mF cm(-3) at a current density of 2.5 mA cm(-2). The enhanced supercapacitive performance of the ultra-flexible OCNTF/PPY supercapacitor is due to the superior pseudocapacitive charge storage exhibited by the oxygen-containing surface functional groups and the redox-active PPY. The supercapacitor is highly bendable and twistable. The ultra-flexible supercapacitor exhibits an excellent cyclic stability of more than 5000 cycles. The all-solid-state flexible OCNTF/PPY supercapacitor module is a promising candidate for application in flexible and wearable electronic devices.
机译：首次使用在碳纤维（OCNTF）/聚吡咯（PPY）刷状电极上生长的氧化碳纳米管制造了超柔韧性纤维超级电容器。在合成OCNTF / PPY纳米复合材料期间，分层介孔的OCNTF用作大表面积的导电基材，用于PPY的电聚合。在此，碳纤维充当OCNTF / PPY纳米复合材料架构的机械支撑，并用作超级电容器的集电器。 X射线光电子能谱分析表明，OCNTF表面存在各种含氧官能团。 OCNTF / PPY超级电容器在电流下的最大重量电容为305 F g（-1），重量能量密度为42 W h kg（-1），最大体积比电容为14 950 mF cm（-3）。密度为2.5 mA cm（-2）。超柔OCNTF / PPY超级电容器的超级电容性能增强，是由于含氧表面官能团和氧化还原活性PPY表现出了优异的伪电容电荷存储能力。超级电容器是高度可弯曲和可扭曲的。超柔性超级电容器具有超过5000次循环的出色循环稳定性。全固态柔性OCNTF / PPY超级电容器模块是在柔性和可穿戴电子设备中应用的有希望的候选者。

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