Fluorescent modified graphene oxide/polyaniline nanowhiskers composites as smart electrode material for supercapacitors
Fluorescent modified graphene oxide/polyaniline nanowhiskers composites as smart electrode material for supercapacitors
复制标题
DOI：
10.1016/j.jtice.2017.10.029
复制
发表时间：
2018
影响因子：
5.7
通讯作者：
Wenling Wu;Dongjuan Niu;Jianfeng Zhu;Liuqing Yang;Yanming Shao;Yuan Fang;Cui Yun
中科院分区：
文献类型：
--
作者：
Wenling Wu;Dongjuan Niu;Jianfeng Zhu;Liuqing Yang;Yanming Shao;Yuan Fang;Cui Yun
通过原位化学氧化聚合法，分别掺杂荧光剂黄绿素（F）、罗丹明B（R）和香豆素（C），成功制备了具有有序聚苯胺纳米晶须的荧光改性氧化石墨烯/聚苯胺（Xn-GO/PANI，或Xn-GP）复合材料。有序的PANI纳米晶须（~ 25 nm）均匀生长在GO片的表面和边缘。TEM和SEM图像显示了Xn-GP纳米复合材料的准二维（2D）结构。FT-IR、UV-vis和荧光光谱分析进一步验证了Xn-GP复合物的结构。作为超级电容器电极材料的电化学测试结果表明，Fn-GP、Rn-GP和Cn-GP纳米复合材料在0.5A/g下具有较高的电化学比容量（分别为555.6F/g、473.5F/g和459.5F/g），较低的电荷转移电阻，以及优异的CV、GCD、EIS和循环稳定性。Xn-GP三元复合材料的上级电化学性能主要归因于Xn、GO和PANI的良好协同效应，这为有效的电子传递提供了准二维导电基体，为离子扩散提供了合适的通道，提供了良好的π-π相互作用，并为PANI纳米晶须在充放电过程中的体积膨胀提供了有效的缓冲。特别是具有荧光性质的新型Xn-GP复合材料作为超级电容器的智能电极材料具有很好的应用前景。
Fluorescent modified Graphene oxide/Polyaniline (Xn-GO/PANI, or Xn-GP) composites with ordered PANI nanowhiskers were successfully fabricated through a facilein situchemical oxidation polymerization doping the fluorescent agents, Fluorescein (F), Rhodamine B (R) and Coumarin (C), respectively. The ordered PANI nanowhiskers (∼25 nm) were uniformly grown onto the surface and edge of GO sheets. TEM and SEM images demonstrated a quasi-two-dimensional (2D) architecture of Xn-GP nanocomposites. FT–IR, UV–vis, and Fluorescence emission analysis further verified the Xn-GP composites. As electrode materials for supercapacitors, the electrochemical results confirmed that the Fn-GP, Rn-GP and Cn-GP nanocomposites possessed the high electrochemical specific capacitance (555.6 F/g, 473.5 F/g and 459.5 F/g, respectively) at 0.5 A/g, the low charge transfer resistance, and excellent electrochemical stability by CV, GCD, EIS and cycle stability. The superior electrochemical performance of the Xn-GP ternary composites are principally ascribed to the fine synergistic effects of Xn, GO and PANI, which offered a quasi-2D conductive matrix for effective electron transfer, suitable channels for ion diffusion, good π–π interactions, and valid buffer for volume expansion of the PANI nanowhiskers during charge/discharge process. Especially, the novel Xn-GP composites with fluorescence property have the promising applications as smart electrode materials for supercapacitors.