Supercapacitor based on H+ and Ni2+ co-doped polyaniline–MWCNTs nanocomposite: synthesis and electrochemical characterization
Supercapacitor based on H+ and Ni2+ co-doped polyaniline–MWCNTs nanocomposite: synthesis and electrochemical characterization
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DOI：
10.1039/c3ra40955d
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发表时间：
2013-07
期刊：
影响因子：
3.9
通讯作者：
D. Ghosh;Soumen Giri;A. Mandal;C. Das
中科院分区：
文献类型：
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作者：
D. Ghosh;Soumen Giri;A. Mandal;C. Das
在寻找有前途的电极材料的超级计算机应用中，我们已经合成了一个Ni 2+掺杂的聚苯胺，并基于多壁碳纳米管（MWCNTs）和Ni 2+掺杂的聚苯胺（PANI）在盐酸介质中通过原位氧化聚合的纳米复合物。在HCl介质中，在Ni 2+存在下，PANI变成与H+和Ni 2+共掺杂。通过FTIR、拉曼光谱和XRD研究对合成材料进行了表征。场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）分析证实了成功的涂层的共掺杂聚苯胺的多壁碳纳米管表面。电化学表征通过三电极系统进行，用1 M H2SO 4作为电解质。用H+和Ni 2+共掺杂的PANI在0.5 A g-1恒定电流下表现出311 F g-1的比电容，这高于仅H+掺杂的PANI在相同条件下表现出265 F g-1的比电容。将MWCNT掺入共掺杂的PANI影响比电容，在相同的恒定电流密度下增加到781 F g−1，在700次恒电流循环中初始比电容保持92%。
In the search for promising electrode materials for supercomputer applications, we have synthesized a Ni2+ doped polyaniline, and a nanocomposite based on multiwalled carbon nanotubes (MWCNTs) and a Ni2+ doped polyaniline (PANI) in a HCl medium by an in situ oxidative polymerization. In the HCl medium and in the presence of Ni2+, PANI becomes co-doped with both H+ and Ni2+. The as synthesized materials were characterized by FTIR and Raman spectroscopy and an XRD study. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) analyses confirmed the successful coating of the co-doped PANI on the MWCNT surface. The electrochemical characterizations were carried out by a three electrode system, with 1 M H2SO4 as the electrolyte. The PANI co-doped with H+ and Ni2+exhibited a specific capacitance of 311 F g−1 at a 0.5 A g−1 constant current, which was higher than that of the solely H+ doped PANI, which exhibited a specific capacitance of 265 F g−1 under the same conditions. The incorporation of MWCNTs to the co-doped PANI influenced the specific capacitance to increase to 781 F g−1 at the same constant current density, with a 92% retention of initial specific capacitance over 700 galvanostatic cycles.