Wachter, Phillipp and Schreiner, Christian and Zistler, Markus and Gerhard, Dirk and Wasserscheid, Peter and Gores, Heiner J. (2008) A microelectrode study of triiodide diffusion coefficients in mixtures of room temperature ionic liquids, useful for dye-sensitised solar cells. MICROCHIMICA ACTA, 160 (1-2). pp. 125-133. ISSN 0026-3672, 1436-5073
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The diffusion coefficients of triiodide in binary mixtures of ionic liquids at 25 +/- 0.05 degrees C were determined via steady-state cyclic voltammetry at platinum disk microelectrodes in five different electrolyte systems, all representing potential ionic liquid based electrolytes for dye-sensitised solar cells. These electrolytes were composed of iodine, 1-methyl-3-propylimidazolium iodide (acting as iodide source) and a second lower viscous ionic liquid, namely 1-ethyl-3-methylimidazolium dicyanamide, 1-ethyl-3-methylimidazolium tetrafluoroborate or 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) and were investigated either at fixed ionic liquid composition and varying iodine concentration or at fixed iodine concentration and varying 1-methyl-3-propylimidazolium iodide content. To check and optimise our measurement set-up, four Pt disk microelectrodes with four different electrode radii (0.3-5 mu m) were tested at a well known system (ferrocene/tetraethylammonium tetrafluoroborate/acetonitrile solutions). The radius of each electrode was controlled by scanning electron microscopy at the beginning and during the work.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHARGE-TRANSPORT; ORGANIC-SOLVENTS; DISK ELECTRODES; REDOX COUPLE; STEADY-STATE; ELECTROLYTES; IODIDE; ULTRAMICROELECTRODES; ELECTROCHEMISTRY; PERFORMANCE; microelectrode; diffusion coefficient; ionic liquids; non-Stokesian transport behaviour |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Heiner Jakob Gores |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Nov 2020 06:06 |
| Last Modified: | 23 Nov 2020 06:06 |
| URI: | https://pred.uni-regensburg.de/id/eprint/31720 |
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