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首页> 外文期刊>Journal of Applied Polymer Science >Electrochemical performance of polydopamine modified PANI/rGO composites: Dependency on preparation sequence
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Electrochemical performance of polydopamine modified PANI/rGO composites: Dependency on preparation sequence

机译：聚二胺改性PANI / RGO复合材料的电化学性能：依赖性序列

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摘要

Compounding polyaniline (PANI) and reduced graphite oxide (rGO) is a fascinating cost-effective way to combine the high energy density of faradic material and high power density of carbonaceous material. In this study, in-situ polymerization of dopamine was used to reduce graphite oxide and to modify the rGO product with polydopamine (PDA) simultaneously. This modification prevented restacking of rGO, and enhanced the interactions between PANI and rGO. The partial reduction of GO during the polymerization of dopamine was proven by X-ray diffraction, Fourier transform infrared attenuated total reflectance, and UV-vis spectroscopy. Surprisingly, the electrochemical performance of the composites depends strongly on the preparation sequence. PANI/(rGO-PDA) composites obtained by the synthesis of PANI in the presence of rGO-PDA show better electrochemical performance than (PANI/rGO)-PDA composites, which were produced by polymerizing dopamine in the presence of PANI/GO composite. At a given scan rate of 20 mV s(-1), the highest specific capacity of PANI/(rGO-PDA) composites was 230.7 F g(-1), which was higher than those of all (PANI/rGO)-PDA composites. This phenomenon is tightly related to the differences in morphologies, conductivities and specific surface areas of the two types of composites.
机译：聚苯胺（PANI）和还原氧化石墨（rGO）的复合是将法拉第材料的高能量密度和碳质材料的高功率密度结合起来的一种极具吸引力的成本效益的方法。在这项研究中，多巴胺的原位聚合被用于还原氧化石墨，同时用聚多巴胺（PDA）修饰rGO产物。这种修改防止了rGO的重新打包，并增强了PANI和rGO之间的相互作用。X射线衍射、傅里叶变换红外衰减全反射光谱和紫外-可见光谱证实了多巴胺聚合过程中GO的部分还原。令人惊讶的是，复合材料的电化学性能在很大程度上取决于制备顺序。在rGO-PDA存在下合成PANI/（rGO-PDA）复合材料比在PANI/GO复合材料存在下聚合多巴胺制备的（PANI/rGO）-PDA复合材料具有更好的电化学性能。在20mvs（-1）的扫描速率下，PANI/（rGO-PDA）复合材料的最高比容量为230.7fg（-1），高于所有（PANI/rGO）-PDA复合材料。这一现象与两种复合材料的形貌、导电性和比表面积的差异密切相关。

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