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Synthesis and characterisation of polyaniline/polyvinyl alcohol composites as supercapacitor electrode materials
Plastics, Rubber and Composites ( IF 2 ) Pub Date : 2021-09-23 , DOI: 10.1080/14658011.2021.1981090
Roopasri Rajamany 1 , Sivakrishna Prakash 1 , Yahya A. Ismail 1
Affiliation  

ABSTRACT

Composites of polyaniline and polyvinyl alcohol were prepared through an in-situ polymerisation of aniline using ethanol as a coagulating agent and characterised for their applicability as supercapacitor electrode material. The thermally stable composites afford moderately high electrical conductivity. Composite with 0.03 mol aniline exhibited a high electrical conductivity of 0.371 × 10−2 S/cm. The variation in electrical conductivity with an increase in aniline content is consistent with the band gap energies estimated from electronic spectra and IR drop. SEM analysis confirms coral-like nanowires of polyaniline (PANI) grown within the polyvinyl alcohol matrix. Cyclic voltametric studies revealed that the composites are highly electroactive as they allow easy diffusion of ions through the nanowires of PANI for efficient electrochemical reaction. The composite with 0.03 mol aniline has a superior specific capacitance of 302 Fg−1 at a scan rate of 5 mV/s. The composite exhibited a maximum energy density of 41.94 Whkg−1 and excellent stability even after storage of 18 months in ambient condition with 83.3% capacitance retention.



中文翻译:

聚苯胺/聚乙烯醇复合材料作为超级电容器电极材料的合成与表征

摘要

聚苯胺和聚乙烯醇的复合材料是通过苯胺原位聚合制备的,使用乙醇作为凝结剂,并表征了它们作为超级电容器电极材料的适用性。热稳定的复合材料具有中等高的导电性。含有 0.03 mol 苯胺的复合材料表现出 0.371 × 10 -2的高电导率米/厘米。随着苯胺含量的增加,电导率的变化与从电子光谱和 IR 降估计的带隙能量一致。SEM 分析证实了聚苯胺 (PANI) 的珊瑚状纳米线在聚乙烯醇基质中生长。循环伏安研究表明,复合材料具有高度的电活性,因为它们允许离子通过 PANI 纳米线轻松扩散,从而实现有效的电化学反应。具有 0.03 mol 苯胺的复合材料在 5 mV/s 的扫描速率下具有 302 Fg -1的优异比电容。即使在环境条件下储存 18 个月后,该复合材料也表现出 41.94 Whkg -1的最大能量密度和优异的稳定性,电容保持率为 83.3%。

更新日期:2021-09-23
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