Skip to main content
placeholder image

Investigation of the applied potential limits for polypyrrole in a two-electrode device

Conference Paper


Abstract


  • The long term operation of two electrode all polymer devices requires a balance between extending the potential limits as far as possible to give full oxidation and reduction of the CEPs, while ensuring that the potentials at which overoxidation occurs are not reached. In this work, the `true' potential (vs Ag/AgCl) at one electrode in a two-electrode cell was determined whilst applying a range of potential differences between the two polypyrrole electrodes. At an applied potential of ±2 V, only slight overoxidation of polypyrrole was evident at either electrode. However, for long term applications of polymer films it was shown that ±1.5 V would be more suitable. This potential difference was applied over an extended period in a series of potential steps to a two electrode device in a propylene carbonate solution and found to have no deleterious effects on the polymer electrodes. It was also shown that this potential difference was sufficient to fully oxidize and reduce PPy both in a supporting electrolyte solution and as a component of a two-electrode solid state device.

Publication Date


  • 1999

Citation


  • Lewis, T. W., Spinks, G. M., Wallace, G. G., & De Rossi, D. (1999). Investigation of the applied potential limits for polypyrrole in a two-electrode device. In Proceedings of SPIE - The International Society for Optical Engineering Vol. 3669 (pp. 272-282).

Scopus Eid


  • 2-s2.0-0032625322

Start Page


  • 272

End Page


  • 282

Volume


  • 3669

Abstract


  • The long term operation of two electrode all polymer devices requires a balance between extending the potential limits as far as possible to give full oxidation and reduction of the CEPs, while ensuring that the potentials at which overoxidation occurs are not reached. In this work, the `true' potential (vs Ag/AgCl) at one electrode in a two-electrode cell was determined whilst applying a range of potential differences between the two polypyrrole electrodes. At an applied potential of ±2 V, only slight overoxidation of polypyrrole was evident at either electrode. However, for long term applications of polymer films it was shown that ±1.5 V would be more suitable. This potential difference was applied over an extended period in a series of potential steps to a two electrode device in a propylene carbonate solution and found to have no deleterious effects on the polymer electrodes. It was also shown that this potential difference was sufficient to fully oxidize and reduce PPy both in a supporting electrolyte solution and as a component of a two-electrode solid state device.

Publication Date


  • 1999

Citation


  • Lewis, T. W., Spinks, G. M., Wallace, G. G., & De Rossi, D. (1999). Investigation of the applied potential limits for polypyrrole in a two-electrode device. In Proceedings of SPIE - The International Society for Optical Engineering Vol. 3669 (pp. 272-282).

Scopus Eid


  • 2-s2.0-0032625322

Start Page


  • 272

End Page


  • 282

Volume


  • 3669