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Enhanced electrochemical performance of hierarchical porous carbon/polyaniline composite for supercapacitor applications
Nano Express Pub Date : 2021-02-03 , DOI: 10.1088/2632-959x/abdd88
Sangeeta Rawal 1 , U K Mandal 2 , Ashwani Kumar 3 , Yogesh Kumar 4 , Bhawana Joshi 1
Affiliation  

In this work, activated carbon/polyaniline (AC/PANi) composites were synthesized by low temperature in situ polymerization and their electrochemical performance was investigated. Microstructure and morphology examination of the samples confirmed a uniform coating of polyaniline on AC surfaces without any change in the structure. The electrochemical studies of the samples confirmed the improvement in the electrochemical performance of AC/PANi composites. Despite a decrease in the specific surface area a substantial increase in electrochemical performance is recorded for the AC/PANi composites due to the synergistic effect between the pseudocapacitance and double layer capacitance. The highest specific capacitance of 1021 F g−1 was calculated for the APA-29.4 composite in neutral aqueous electrolyte (1 M Na2SO4) which is many times greater than the specific capacitance values for AC (253 F g−1) and PANi (389 F g−1). The enhancement in the electrochemical performance of AC after polymerization with PANi in composites favours its use as a favourable electrode material for the energy storage devices.



中文翻译:

用于超级电容器应用的分级多孔碳/聚苯胺复合材料的电化学性能增强

在这项工作中,活性炭/聚苯胺(AC/PANi)复合材料通过低温原位聚合合成,并研究了它们的电化学性能。样品的微观结构和形态检查证实了 AC 表面上均匀的聚苯胺涂层,结构没有任何变化。样品的电化学研究证实了 AC/PANi 复合材料的电化学性能的改善。尽管比表面积减少,但由于赝电容和双层电容之间的协同效应,AC/PANi 复合材料的电化学性能显着提高。最高比电容1021 F g -1对 APA-29.4 复合材料在中性水性电解质 (1 M Na 2 SO 4 ) 中进行计算,其比 AC (253 F g -1 ) 和 PANi (389 F g -1 )的比电容值大很多倍。AC在复合材料中与PANi聚合后电化学性能的增强有利于其用作储能装置的有利电极材料。

更新日期:2021-02-03
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