种子模板法制备镍盐掺杂聚吡咯纳米纤维及其电化学电容性质

Preparation and Electrochemical Capacitance of Polypyrrole Nanofibers Doped with Ni Salt by Seed Template Method

在镍盐存在下,以氯化铁和甲基橙溶液形成的化合物为种子模板,制备了镍盐掺杂的聚吡咯纳米纤维(Ni-PPy)。用扫描电镜(SEM)对种子模板、聚吡咯及镍盐掺杂聚吡咯的形貌进行了表征。用循环伏安法、电化学阻抗谱和恒流充放电技术测试聚合物的电化学性能。结果表明,以镍盐掺杂聚吡咯为活性物质制成的电极材料在1 mol/L KCl溶液中的比容量高达474 F/g。

Polypyrrole nanofibers doped with Ni salt （Ni-PPy） were synthesized by using the fibrillar complex as a seed template in the presence of Ni salt. Morphologies of the seed template, PPy and Ni-PPy were characterized by SEM. The supercapacitor was assembled with Ni-PPy as active electrode materials and 1 mol/L KCI aqueous solution as electrolyte. The electrochemical performances of the supercapacitor were investigated by cyclic voltammetry, electrochemical impedance speetroseopy and galvanostatic charge-discharge. At a current density of 2 mA/cm^2, the Ni-PPy exhibits high specific capadtance of 474 F/g.