Facile fabrication of self-assembled polyaniline nanotubes doped with d-tartaric acid for high-performance supercapacitors
Facile fabrication of self-assembled polyaniline nanotubes doped with d-tartaric acid for high-performance supercapacitors
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DOI：
10.1016/j.jpowsour.2013.05.117
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发表时间：
2013-11
影响因子：
9.2
通讯作者：
Jingjing Mu;Guofu Ma;Hui Peng;Jiajia Li;K. Sun;Z. Lei
中科院分区：
文献类型：
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作者：
Jingjing Mu;Guofu Ma;Hui Peng;Jiajia Li;K. Sun;Z. Lei
以d-酒石酸(d-TA)为掺杂剂，过硫酸铵((NH4)2S2O8)为氧化剂，采用一种简单的化学无模板法合成了具有优异电化学性能的聚苯胺(PANI)纳米管。用扫描电子显微镜、透射电子显微镜、傅立叶变换红外光谱和X射线衍射仪对不同摩尔比的聚苯胺-(d-TA)的形貌和结构进行了表征。为了评价PANI-(d-TA)材料的电化学性质，进行了循环伏安(CV)和恒流充放电测试。[d-TA]/[苯胺]摩尔比为1：1的PANI-(d-TA)纳米管电极在1M的H_2SO_4水溶液中表现出较大的比电容(在1A/−时高达625F/g−1)和较高的容量保持率(500次循环后为初始容量的77%)。PANI-(d-TA)具有优异的电化学性质主要是由于其独特的纳米管结构，具有较高的电极/电解液接触面积和较短的离子扩散路径。这些新型的PANI-(d-TA)纳米管有望成为高性能超级电容器的电极材料。
Polyaniline (PANI) nanotubes with outstanding electrochemical properties have been successfully synthesized via a simple chemical template-free method in the presence ofd-tartaric acid (d-TA) as the dopant, and ammonium persulfate ((NH4)2S2O8) as the oxidant. The morphologies and structures of PANI-(d-TA) with different [d-TA]/[aniline] molar ratios are characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) and X-ray diffraction (XRD). To assess the electrochemical properties of PANI-(d-TA) materials, cyclic voltammetry (CV) and galvanostatic charging–discharging measurements are performed. The PANI-(d-TA) nanotubes electrode, with [d-TA]/[aniline] molar ratio of 1:1, exhibits larger specific capacitance (as high as 625 F g−1at 1 A g−1) and higher capacitance retention (77% of its initial capacitance after 500 cycles) in 1 M H2SO4aqueous solution. The remarkable electrochemical characteristics of PANI-(d-TA) are mainly attributed to their unique nanotubular structures, which provide a high electrode/electrolyte contact area and short ions diffusion path. These novel PANI-(d-TA) nanotubes will be promising electrode materials for high-performance supercapacitors.