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首页> 外文期刊>RSC Advances >Covalently linked benzimidazole-containing reduced graphene oxide/polyaniline nanocomposites as electrode materials
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Covalently linked benzimidazole-containing reduced graphene oxide/polyaniline nanocomposites as electrode materials

机译：共价连接的含苯并咪唑的还原氧化石墨烯/聚苯胺纳米复合材料作为电极材料

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摘要

In the present manuscript, we reported the effective synthesis of 1,3-bis(2′-benzimidazolyl)-5-aminobenzene-grafted graphene oxide, followed by reduction, affording covalently linked benzimidazole-containing chemically modified reduced graphene oxide. The prepared material was further coated with polyaniline via in situ polymerization. The prepared material was successfully characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray powder diffraction (XRPD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and thermo-gravimetric analysis (TGA); subsequently, it was subjected to electrochemical analysis using a three-electrode system in dilute acid solutions as electrolytes in terms of cyclic voltammetry (CV), galvanostatic charge–discharge and electrochemical impedance studies. The polyaniline-coated binary composite materials revealed maximum specific capacitance of 823 F g ~(?1) at 0.2 A g ~(?1) current density, whereas the value for the chemically modified reduced graphene oxide was 477 F g ~(?1) . The CV curves denoted the pseudocapacitive nature of the electrode materials. The values for the retention of specific capacitance for the electrode materials were 77.5% and 87.9% up to 5000 charge–discharge cycles.
机译：在本手稿中，我们报道了1,3-双（2'-苯并咪唑基）-5-氨基苯接枝的氧化石墨烯的有效合成，然后还原，得到了共价连接的含苯并咪唑的化学修饰的还原氧化石墨烯。经由原位聚合将制备的材料进一步用聚苯胺涂覆。通过傅立叶变换红外（FT-IR）光谱，X射线粉末衍射（XRPD），X射线光电子能谱（XPS），场发射扫描电子显微镜（FESEM），透射电子显微镜（TEM）成功表征了所制备的材料，以及热重分析（TGA）;随后，在循环伏安法（CV），恒电流充放电和电化学阻抗研究方面，使用三电极系统在稀酸溶液中作为电解质对其进行了电化学分析。聚苯胺涂层二元复合材料在0.2 A g〜（？1）电流密度下的最大比电容为823 F g〜（？1），而化学改性的还原氧化石墨烯的值为477 F g〜（？1） ）。 CV曲线表示电极材料的假电容性质。直到5000次充放电循环，电极材料的比电容保留值分别为77.5％和87.9％。

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