Bruglachner, H. and Jordan, S. and Schmidt, M. and Geissler, W. and Schwake, A. and Barthel, J. and Conway, B. E. and Gores, H. J. (2006) New electrolytes for electrochemical double layer capacitors - 1. Synthesis and electrochemical properties of 1-ethyl-3-methylimidazolium bis[1,2-oxalato(2-)-O,O']borate. JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS, 9 (3). pp. 209-220. ISSN 1480-2422,
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In this article details of the synthesis, analysis, purification, and electrochemical properties of 1-ethyl-3-methylimidazolium bis[1,2-oxalato(2-)-O,O']borate (EMIBOX) are reported. The concentration dependence of conductivities of EMIBOX in non-aqueous pure solvents and blends of solvents were measured at 25 degrees C, 5 degrees, 15 degrees C, and 35 degrees C, and fitted to the Casteel-Amis equation. Cyclic voltammetry showed a high anodic voltage limit of more than 4.9 V vs. Li/Li+ sufficient for charging/discharging double-layer capacitor modules over the potential range 0 V to 2.5V. Capacitors employing cloth-type carbon electrodes, filled with solutions of EMIBOX based on pure solvents and solvent blends were submitted to cycling up to 100,000 cycles, and measurements of impedance spectroscopy, open-circuit voltage and voltage decay were made. The salt may be a useful substitute for fluorine-containing salts such as tetraethylammonium tetrafluoroborate, at least at ambient and higher temperatures.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LITHIUM BIS(OXALATO)BORATE; TEMPERATURE-DEPENDENCE; BATTERY ELECTROLYTES; NONAQUEOUS SOLUTIONS; PROPYLENE CARBONATE; SALT; LIBOB; CONDUCTANCE; GRAPHITE; CONDUCTIVITY; electrochemical double layer capacitors; non-aqueous electrolytes; 1-ethyl-3-methylimidazolium bis[1,2-oxalato(2-)O,O']borate |
| 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: | 11 Feb 2021 09:47 |
| Last Modified: | 11 Feb 2021 09:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/34389 |
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