纳米叶状聚苯胺超级电容器

Leafy nanostructure PANI for material of supercapacitors

纳米导电聚苯胺(PANI),作为超级电容器的电极材料,有着广阔的应用前景.采用三电极体系下的恒定电流法,通过多步电化学聚合获得以导电玻璃(ITO)为基底的纳米结构导电聚苯胺薄膜.采用场发射扫描电子显微镜(FESEM)对薄膜进行形貌表征.由于电极材料的纳米结构,材料的比电容在电流密度为1 A/g及10 A/g下分别为829 F/g及667 F/g.以20 A/g的电流密度对电极进行500次的恒定电流充放电测试,电极的比电容下降为95.1%,显示了较好的循环稳定性.

Nanostructure conducting polyaniline（PANI） has great potential applications in supercapacitor electrode materials. In this paper, we report a template-free approach to synthesize PANI by a galvanostatic current procedure with a three-electrode con- figuration directly on indium-doped tin-oxide substrates （ITO）. The morphology of product was characterized by Hitachi S -4800 field emission scanning electron microscope （FE-SEM）. Due to the nanostructure,the specific capacitance of PANI film with the thickness of 100nm were measured as high as 829 F/g and 667 F/g at a charge-discharge current density of 1 A/g and 10 A/g re- spectively. After 500 cycle charge-discharge test employed at the current density of 20 A/g the PANI film still had a 95.1% ca- pacitance retention.