Transition Metal-Doped Polyaniline/Single-Walled Carbon Nanotubes Nanocomposites: Efficient Electrode Material for High Performance Supercapacitors
Transition Metal-Doped Polyaniline/Single-Walled Carbon Nanotubes Nanocomposites: Efficient Electrode Material for High Performance Supercapacitors
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DOI：
10.1021/sc5000072
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发表时间：
2014-05-01
影响因子：
8.4
通讯作者：
Das, C. K.
中科院分区：
文献类型：
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作者：
Dhibar, Saptarshi;Bhattacharya, Pallab;Das, C. K.
对超级电容器等上级储能装置的需求一直在增长，以满足混合动力汽车和可再生能源系统的应用需求。在这里，我们报告了一个简单的方法来合成氯化锰（MnCl 2）掺杂聚苯胺（PANI）/单壁碳纳米管（SWCNTs）的电化学超级电容器纳米复合材料。通过傅里叶变换红外光谱（FTIR）、紫外-可见光谱和拉曼光谱研究了MnCl 2与聚苯胺和单壁碳纳米管之间可能的相互作用。利用场发射扫描显微镜（FESEM）和透射电子显微镜（TEM）研究了电极材料的形貌特征。所制备的纳米复合材料在室温下表现出较高的电导率为9.65 S/cm，并达到非线性的电流-电压特性。在0.5 A/g电流密度下，复合材料的最大比电容为546 F/g。过渡金属掺杂和单壁碳纳米管增强了纳米复合材料的电化学性能。更好的比电容和充电/放电速率使它们成为超级电容器中电极的有前途的候选者，将高能量密度与高水平的功率传输相结合。
The demand for superior energy storage devices, such as supercapacitors, has been growing to meet the application requirements of hybrid vehicles and renewable energy systems. Here, we report a simple method to synthesize manganese chloride (MnCl2)-doped polyaniline (PANI)/single-walled carbon nanotubes (SWCNTs) nanocomposites for electrochemical supercapacitors. The possible interactions between MnCl2 and both PANI and SWCNTs was studied by Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy, and Raman spectroscopy. The morphological characteristics of the electrode materials were investigated by field emission scanning microscopy (FESEM) and transmission electron microscopy (TEM). As-prepared nanocomposites showed higher electrical conductivity of 9.65 S/cm at room temperature and reached nonlinear current-voltage characteristics. A maximum specific capacitance of 546 F/g has been obtained for the nanocomposites at 0.5 A/g current density. Transition metal doping and SWCNTs enhance the electrochemical properties of the nanocomposites. The better specific capacitance and charge/discharge rates make them promising candidates as electrodes in supercapacitors, combining high energy densities with high levels of power delivery.