Separation of ionic and solvent transport during charge compensation processes in electroactive polymers by a.c. electrogravimetry

被引:34
作者
Gabrielli, C
Keddam, M
Perrot, H
Pham, MC
Torresi, R
机构
[1] Univ Paris 06, CNRS, UPR Phys Liquides & Electrochim 15, F-75252 Paris 05, France
[2] Univ Paris 07, ITODYS, F-75252 Paris, France
[3] Univ Sao Paulo, Dept Quim Fis, BR-13560 Sao Carlos, Brazil
关键词
electrochemical impedance; electrogravimetry; redox polymers; conducting polymers; ionic insertion;
D O I
10.1016/S0013-4686(99)00136-X
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Simultaneous measurement of the faradaic impedance and electrogravimetric transfer function during the redox reactions of a polymer in HClO4 allows anions, cations and solvent contributions to the charge compensation processes to be separated and their insertion/expulsion rate to be evaluated. A model of the transport processes in the polymer and the charge transfer kinetics of the ions and solvent at the polymer/solution interface is proposed. For the polymers and experimental conditions investigated, it was shown that the anions are generally inserted and the solvent generally expelled. Concerning the cations or species related to cations. e.g. hydronium ions, they can be either inserted or expelled. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:4217 / 4225
页数:9
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