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KMID : 1059519980420060664
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Journal of the Korean Chemical Society
1998 Volume.42 No. 6 p.664 ~ p.671
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Electrochemica Properties of Polypyrrole/Polyfuran Polymer Composite Electrode
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Cha Seong-Keuck
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Abstract
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Poly pyrrole polymer(ppy) has an excellent electrical conductivity and can be easfly polymerized on anode to give various morophology according to doped anion on electroactive sites. To improve the properties of brittleness, ageing and hydrophobisity, poly ftiran polymer(pfu) having a high initiation potenfial was anodically implanted in this porous ppy film matrix to get the Pt/ppy/pfu(x)type of polymer composite electrode. Cyclic voltammetry and electrochemical impedance methods were used to these electrode, where PF6- , BF4-, and C1O4- ions were employed as dopants. The composition of the pfu(x) at the electrode was changed from 0 to 1.10, but the range was useful only at 0.1 to 0.2 as the redox electrode. The polymer composite electrode doped with PF6- was better in charge transfer resistance by a factor of 40 times and in double layer capacitance by a factor of 20 times than others. The charge transfer in the polymer film of the electrode was influenced on frequency change and equivalent circuit of this electrode had Warburg impedance including mass transfer.
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