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Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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Suppression of the loss of an electroactive dopant from polypyrrole by using a non-aqueous electrolyte of dopant-phobicity

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Title
Suppression of the loss of an electroactive dopant from polypyrrole by using a non-aqueous electrolyte of dopant-phobicity
Author
Hwang, Ryeo YunKim, Sung YeolPalmore, G. Tayhas R.Song, Hyun-Kon
Keywords
Chemical degradation; De-doping; Electroactive; Electroactive dopants; Electrochemical stimulus; Model system; Non-aqueous electrolytes; Overoxidations; Oxidized state; Quartz crystal microgravimetry
Issue Date
201107
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v.657, no.41276, pp.181 - 186
Abstract
Loss of electroactive dopants from conducting polymers (CPs) was investigated by electrochemical quartz crystal microgravimetry (EQCM). pPy[ABTS], polypyrrole doped with ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate), was used as a model system. Two different kinds of electrolytes were used for studying the loss of dopants under electrochemical stimuli: one is a solvent to dissolve the dopant (dopant-philic) while the dopant is insoluble in the other (dopant-phobic). Degradation of polypyrrole backbone as well as loss of the dopant from pPy[ABTS] was observed in the dopant-philic electrolyte. Severe chemical overoxidation of polypyrrole by the most oxidized state of ABTS {(ABTS(2+))(2-)} was emphasized as a factor responsible for de-doping in addition to potential-driven overoxidation or ion exchange. In the dopant-phobic electrolyte, however, the chemical degradation of the polymer film was suppressed.
URI
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DOI
http://dx.doi.org/10.1016/j.jelechem.2011.03.028
ISSN
1572-6657
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ECHE_Journal Papers

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