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首页> 外文期刊>Clean technologies and environmental policy >One-pot synthesis of covalently functionalized reduced graphene oxide-polyaniline nanocomposite for supercapacitor applications
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One-pot synthesis of covalently functionalized reduced graphene oxide-polyaniline nanocomposite for supercapacitor applications

机译：一锅合成共价官能化的氧化石墨烯-聚苯胺纳米复合材料，用于超级电容器

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摘要

A high-performance reduced graphene oxide–polyaniline (RGO-PANI) electrode material was prepared through commercially viable, facile one-pot synthesis, applying famed diazotization chemistry and grafting strategy. In this work, 4-nitroaniline was utilized as a grafting substrate to bind reduced graphene oxide and polyaniline covalently to a highly stable and efficient supercapacitor electrode material. The chemical composition and structural analysis of covalently functionalized RGO-PANI nanocomposites were characterized by X-ray diffraction, field-emission scanning electron microscopy, Raman spectroscopy, UV–visible spectroscopy, and Fourier-transform infrared spectroscopy. The electrochemical behavior of the nanocomposites was analyzed through cyclic voltammetry, galvanostatic charge and discharge, and electrochemical impedance spectroscopy. The prepared nanocomposite shows a high specific capacitance of 490 F g_(−1)in 1 M Na~(2)SO~(4)with outstanding cyclic stability (10,000 cycles). The applied covalent functionalization through grafting strategy was the principal factor for both high specific capacitance and excellent cyclic stability. Graphical abstract.
机译：通过著名的重氮化化学方法和接枝策略，通过商业上可行的，简便的一锅合成，制备了高性能的氧化石墨烯-聚苯胺（RGO-PANI）电极材料。在这项工作中，将4-硝基苯胺用作接枝基材，将还原的氧化石墨烯和聚苯胺共价结合到高度稳定和高效的超级电容器电极材料上。通过X射线衍射，场发射扫描电子显微镜，拉曼光谱，紫外可见光谱和傅里叶变换红外光谱对共价官能化RGO-PANI纳米复合材料的化学组成和结构分析进行了表征。通过循环伏安法，恒电流充放电和电化学阻抗谱分析了纳米复合材料的电化学行为。制备的纳米复合材料在1M Na〜（2）SO〜（4）中表现出490 F g _（-1）的高比电容，具有出色的循环稳定性（10,000个循环）。通过接枝策略应用的共价官能化是获得高比电容和出色的循环稳定性的主要原因。图形概要。

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