基于碳纳米管的超级电容器聚吡咯电极复合方法

Compound Method of Supercapacitor PPy Electrode Based on Carbon Nanotube

针对聚吡咯超级电容器机械性能随着充放电循环而降低、循环稳定性差的缺陷,提出了基于多壁碳纳米管的超级电容器聚吡咯电极复合方法。形成的聚吡咯包覆多壁碳纳米管的结构有效地增大了电极材料的比表面积,增大了电极材料活性物质的利用率,提高了电极材料的电导率,改善了电极材料的快速充放电性能,同时很大程度上改善了聚吡咯的循环稳定性。利用脉冲电流沉积的方法制备用于超级电容器的聚吡咯与功能化多壁碳纳米管复合电极材料,其在3mol∙L^-1氯化钾电解液中,1000mV∙s^-1扫描速率下,经10万周循环后,容量仅衰减了16%。

For the defect that the mechanical properties of polypyrrole supercapacitors decrease with charge and discharge cycles,and the cycle stability is poor,a compound method of polypyrrole electrode for supercapacitors based on multi-walled carbon nanotubes is proposed.The structure of the formed polypyrrole coated multi-walled carbon nanotubes effectively increase the specific surface area of the electrode material,the utilization rate of the active material and the electrical conductivity,improve the rapid charge and discharge performance of the electrode material,and greatly improve cyclic stability of polypyrrole.The composite electrode material of polypyrrole and functionalized multi-walled carbon nanotubes for supercapacitors is prepared by pulse current deposition method.It is scanned at a scanning rate of 1000mV∙s^-1 in a 3mol∙L^-1 potassium chloride electrolyte,after 100,000-cycle,the capacity only declines by 16%.