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Development of Electropolymerized carbon nanotubes-polyaniline-3D graphene foam nanocomposite for supercapacitor applications

机译：用于超级电容器的电聚合碳纳米管-聚苯胺-3D石墨烯泡沫纳米复合材料的开发

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In this work, we present the development of carbon nanotubes (CNTs)-polyaniline (Pani)-3D graphene foam (GP foam) composite prepared by electropolymerization process for supercapitor applications. GP foam was fabricated by chemical vapor deposition (CVD) on Ni foam using acetylene/hydrogen mixture (3/24 sccm) at 700°C for 3 minutes. Next, the foam was then etched in 3M HC1 for an hour to partly remove Ni template. Next, multi-wall CNTs powder was dispersed in 1M HC1 under sonication at 80°C for 2 hours and 0.2 M aniline monomer was added. Electrochemical polymerization in CNTs-aniline monomer solution was then conducted on the GP-foam at 0.55 V vs. Ag/AgCl. Characterizations by electron microscopy and Raman spectroscopy confirmed the incorporation of CNTs in Pani/GP foam network with a number of nanowire features appeared on GP foam surface and dominant D and G carbon's peaks compared with PANI peaks. Cyclic voltammetry results in 2M H_2SO_4 electrolyte showed that PANI's redox peaks were broadened due to the presence of CNTs, indicating enhanced pseudocapacitance. From galvanostatic charge-discharge measurement, CNTs-Pani-GP foam exhibits a high specific capacitance of 920 Fg~(-1) at a specific current of 0.8 Ag~(-1), which is more than twice higher than that of Pani-GP foam (430 Fg~(-1)). Therefore, CNTs-Pani-GP foam is a promising candidate for supercapacitor applications.
机译：在这项工作中，我们介绍了通过超级电容器应用电聚合工艺制备的碳纳米管（CNT）-聚苯胺（Pani）-3D石墨烯泡沫（GP泡沫）复合材料的开发。 GP泡沫塑料是通过乙炔/氢气混合物（3/24 sccm）在700℃下3分钟在Ni泡沫塑料上进行化学气相沉积（CVD）制成的。接下来，然后将泡沫在3M HCl中蚀刻一小时，以部分去除Ni模板。接下来，将多壁CNTs粉末在80℃超声处理下分散在1M HCl中2小时，并添加0.2M苯胺单体。然后在相对于Ag / AgCl为0.55V的GP泡沫上在CNT-苯胺单体溶液中进行电化学聚合。通过电子显微镜和拉曼光谱表征，证实了在Pani / GP泡沫网络中并入了CNT，GP泡沫表面上出现了许多纳米线特征，与PANI峰相比，主要的D和G碳峰出现了。循环伏安法在2M H_2SO_4电解质中的结果表明，由于CNT的存在，PANI的氧化还原峰变宽，表明伪电容增强。根据恒电流充放电测量，CNTs-Pani-GP泡沫在0.8 Ag〜（-1）的比电流下显示出920 Fg〜（-1）的高比电容，是Pani-GP泡沫的两倍以上。 GP泡沫（430 Fg〜（-1））。因此，CNTs-Pani-GP泡沫是超级电容器应用的有前途的候选者。

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