Electrochemical behaviour of poly(3,4-ethylenedioxythiophene) in a room-temperature ionic liquid

被引：70

作者：

Randriamahazaka, H ^{[1
]}

Plesse, C ^{[1
]}

Teyssié, D ^{[1
]}

Chevrot, C ^{[1
]}

机构：

[1] Univ Cergy Pontoise, EA 2528, Lab Physico Chim Polymeres & Interface, F-95031 Cergy Pontoise, France

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2003年 / 5卷 / 07期

关键词：

conducting polymer; poly(3,4-ethylenedioxythiophene); memory effect; redox switching; ionic liquid;

D O I：

10.1016/S1388-2481(03)00142-5

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The cyclic voltammetry responses and the redox switching dynamics of poly(3,4-ethylenedioxythiophene) (PEDOT) in a room-temperature ionic liquid, 1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)amide (EMImTf(2)N), were investigated. The shape of the cyclic voltammograms showed two anodic and two cathodic peaks. These peak currents varied linearly with the scan rate indicating a thin-layer behaviour. No memory effects were observed during the cyclic voltammetry experiments in this ionic liquid. On the other hand, the redox switching dynamics of PEDOT were studied by means of potential step experiments. The analysis of chronocoulograms in term of RC-circuits indicated that the time dependence of the charge transferred during the potential step showed two time constants. These results were consistent with the postulated structure or morphology of the PEDOT film which contained two types of coexisting zones: a compact and an open structures. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：613 / 617

页数：5

共 30 条

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