Capacitance properties of poly(3,4-ethylenedioxythiophene)/polypyrrole composites
Capacitance properties of poly(3,4-ethylenedioxythiophene)/polypyrrole composites
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DOI：
10.1016/j.jpowsour.2006.04.011
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发表时间：
2006-09
影响因子：
9.2
通讯作者：
Youlong Xu;Jie Wang;Wei-Feng Sun;Shihai Wang
中科院分区：
文献类型：
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作者：
Youlong Xu;Jie Wang;Wei-Feng Sun;Shihai Wang
通过在聚吡咯（PPy）修饰钽电极表面电聚合3，4-乙撑二氧噻吩（EDOT），制备了聚3，4-乙撑二氧噻吩/聚吡咯复合电极。采用循环伏安法（CV）、恒电流充放电和电化学阻抗谱（EIS）等技术研究了该材料的电化学电容性能。结果表明，由于聚（3，4-乙撑二氧噻吩）（PEDOT）和聚吡咯（PPy）的协同效应，复合电极的比电容远高于纯PEDOT或纯聚吡咯电极。此外，在具有喇叭状结构的聚吡咯表面制备的复合材料的比电容高达200 Fg-1以上，并具有良好的循环性能。这表明PEDOT/PPy复合材料有望用作超级电容器的电极材料。
Poly(3,4-ethylenedioxythiophene)/polypyrrole composite electrodes were prepared by electropolymerization of 3,4-ethylenedioxythiophene (EDOT) on the surface of polypyrrole (PPy) modified tantalum electrodes. The electrochemical capacitance properties were investigated with cyclic voltammetry (CV), galvanostatic charge–discharge and electrochemical impedance spectroscopy (EIS) techniques with two- or three-electrode cell configuration. The data showed that the specific capacitance of composite electrodes, due to the synergic effect of poly(3,4-ethylenedioxythiophene) (PEDOT) and PPy, is much higher than the values of either pure PEDOT or pure PPy electrodes. Moreover, the composites prepared on the surface of PPy with horn-like structure allow the specific capacitance up to more than 200Fg−1and have a good cycleability. This implies that PEDOT/PPy composites are promising to be used as electrode material of supercapacitors.