Anodic deposition of composites with a matrix of intrinsically conducting polymers
Composites with conducting polymers (ICPs) as a matrix were electrodeposited on anodes of platinum or carbon black filled polypropylene from a stirred electrolyte with dispersed particulate materials (concentration c E) such as copper phthalocyanine or carbon black (CB). The solvent (H 2O or CH 3CN)...
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Veröffentlicht in: | Electrochimica acta 2000-06, Vol.45 (20), p.3423-3429 |
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Sprache: | eng |
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Zusammenfassung: | Composites with conducting polymers (ICPs) as a matrix were electrodeposited on anodes of platinum or carbon black filled polypropylene from a stirred electrolyte with dispersed particulate materials (concentration
c
E) such as copper phthalocyanine or carbon black (CB). The solvent (H
2O or CH
3CN) contained the monomer (pyrrole or bithiophene) and the supporting electrolyte, 0.1 M LiClO
4. The concentration
c
C in the composite increases in proportion to log
c
E, starting from a threshold value
c
E,O.
c
C-Values of 2–60% are found, depending on the nature of the dispersed material;
c
E,0 varies widely, from 1 mg dm
−3 to 1 g dm
−3. A codeposition mechanism could be derived, consisting of two steps: I. Temkin type strong adsorption of the particle and II. charge transfer. II was treated as an activated, potential dependent process. In case of the polypyrrole/CB-composite
c
C decreases with increasing BET-surface. This is rationalized in terms of a synchronous charge of the electrochemical double layer capacitance of the CB particles. PPy as a matrix is superior over polybithiophene, were oligomers are dissolving. High insertion rates (
c
C) are obtained in comparison to other systems. |
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ISSN: | 0013-4686 1873-3859 |
DOI: | 10.1016/S0013-4686(00)00422-9 |