Silver Nanoparticles Decorated Polyaniline/Multiwalled Carbon Nanotubes Nanocomposite for High-Performance Supercapacitor Electrode
Silver Nanoparticles Decorated Polyaniline/Multiwalled Carbon Nanotubes Nanocomposite for High-Performance Supercapacitor Electrode
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DOI：
10.1021/ie402161e
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发表时间：
2014-03-05
影响因子：
4.2
通讯作者：
Das, Chapal Kumar
中科院分区：
文献类型：
--
作者：
Dhibar, Saptarshi;Das, Chapal Kumar
在当今时代，开发一种简单、廉价、可扩展的技术来制造储能系统仍然是一个挑战。本文采用低成本和简单的工艺制备了用于高性能超级电容器电极的银-聚苯胺/多壁碳纳米管（(Ag-PANI)/MWCNTs）纳米复合材料。利用红外光谱和紫外可见光谱对银和聚苯胺之间可能的相互作用进行了表征。形态学研究证实了在PANI表面形成了Ag纳米粒子，并且随着Ag纳米粒子的存在，MWCNTs被PANI均匀包裹。在室温下，纳米复合材料的电导率为4.24 S/cm，并具有非线性的电流-电压特性。在5 mV/s扫描速率下，该纳米复合材料的最高比电容为528 F/g。纳米复合材料也表现出更好的能量和功率密度。基于Ag-PANI/CNT的超级电容器具有出色的能量和功率密度，使其成为未来储能系统的潜在候选者。
In the modern era, it is still a challenge to develop an easy, inexpensive, and scalable technique to fabricate an energy storage system. Here, a low-cost and simple process was used to fabricate a silver-polyaniline/multiwalled carbon nanotubes ((Ag-PANI)/MWCNTs) nanocomposite for high-performance supercapacitor electrodes. The possible interactions between Ag and PANI were characterized by Fourier transform infrared and UV-visible spectroscopies. Morphological study confirmed the formation of Ag nanoparticles in the PANI surface, and the MWCNTs were uniformly coated by PANI with the presence of Ag nanoparticles. The nanocomposite showed better electrical conductivity of 4.24 S/cm at room temperature and also attained nonlinear current-voltage characteristics. The highest specific capacitance of 528 F/g has been obtained for the nanocomposite at 5 mV/s scan rate. The nanocomposite also showed better energy as well as power density. Ag-PANI/CNT based supercapacitors with outstanding energy and power density make them a potentially promising candidate for future energy storage systems.