One-step fabrication of heterogeneous conducting polymers-coated graphene oxide/carbon nanotubes composite films for high-performance supercapacitors
One-step fabrication of heterogeneous conducting polymers-coated graphene oxide/carbon nanotubes composite films for high-performance supercapacitors
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一步制备高性能超级电容器用异质导电聚合物涂覆氧化石墨烯/碳纳米管复合薄膜
DOI：
10.1016/j.electacta.2016.02.015
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发表时间：
2016-02
影响因子：
6.6
通讯作者：
Han Gaoyi
中科院分区：
文献类型：
--
作者：
Zhou Haihan;Han Gaoyi
采用一步电化学共沉积法制备了非均相导电聚合物包覆氧化石墨烯/碳纳米管（CPs-GO/CNTs; CPs，PPy和PEDOT）复合膜。扫描电子显微镜和透射电子显微镜的表征表明，所制备的CPs-GO/CNTs复合材料具有GO负载CPs包覆CNTs的三元杂化结构。循环伏安、恒流充放电和交流阻抗等电化学测试结果表明，碳纳米管的引入明显提高了CPs-GO电极的电容性能，而PEDOT-GO/CNTs电极的电化学性能随着碳纳米管的引入量的增加而提高。此外，所制备的PPy-GO/CNTs和PEDOT-GO/CNTs三元复合材料具有较高的面比电容（1.0 mA cm−2时分别为142.2 mF cm− 2和99.0 mF cm− 2），同时具有出色的上级倍率性能和出色的循环稳定性（在5000次循环中分别保持初始电容的97.3%和99.2%），这对于它们在高性能超级电容器电极中的应用是必不可少的。
Composite films of heterogeneous conducting polymers-coated graphene oxide/carbon nanotubes (CPs-GO/CNTs; CPs, PPy and PEDOT) have been fabricated via one-step electrochemical co-deposition. Scanning electron microscope and transmission electron microscopy characterizations indicate that the as-prepared CPs-GO/CNTs composites show a GO supported CPs-coated CNTs ternary hybrid microstructure. The electrochemical measurements including cyclic voltammetry, galvanostatic charge/discharge measurements, and electrochemical impedance spectroscopy tests manifest that the capacitive performances of CPs-GO electrodes are obviously promoted as the introduction of CNTs, and the PEDOT-GO/CNTs electrodes exhibit the more significantly improved electrochemical performances as the more CNTs introduced. Furthermore, the as-prepared PPy-GO/CNTs and PEDOT-GO/CNTs ternary composites achieve a high areal specific capacitance (142.2 mF cm−2and 99.0 mF cm−2at 1.0 mA cm−2, respectively), together with superior rate capability, and excellent cycle stability (maintain 97.3% and 99.2% of initial capacitance for 5000 cycles, respectively), which are essential for their applications in high-performance supercapacitor electrodes.
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