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Evaluation of electrochemical methods for determination of the seebeck coefficient of redox electrolytes

Koerver, Raimund, MacFarlane, Douglas R. and Pringle, Jennifer M. 2015, Evaluation of electrochemical methods for determination of the seebeck coefficient of redox electrolytes, Electrochimica acta, vol. 184, pp. 186-192, doi: 10.1016/j.electacta.2015.10.070.

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Title Evaluation of electrochemical methods for determination of the seebeck coefficient of redox electrolytes
Author(s) Koerver, Raimund
MacFarlane, Douglas R.
Pringle, Jennifer M.ORCID iD for Pringle, Jennifer M. orcid.org/0000-0002-2729-2838
Journal name Electrochimica acta
Volume number 184
Start page 186
End page 192
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-12-01
ISSN 0013-4686
Keyword(s) redox couple
ionic liquids
Seebeck coefficient
thermal energy
Summary Recent advances in thermoelectrochemical cells, which are being developed for harvesting low grade waste heat, have shown the promise of cobalt bipyridyl salts as the active redox couple. The Seebeck coefficient, Se, of a redox couple determines the open circuit voltage achievable, for a given temperature gradient, across the thermoelectrochemical cell. Thus, the accurate determination of this thermodynamic parameter is key to the development and study of new redox electrolytes. Further, techniques for accurate determination of Se using only one half of the redox couple reduces the synthetic requirements. Here, we compare three different experimental techniques for measuring Se of a cobalt tris(bipyridyl) redox couple in ionic liquid electrolytes. The use of temperature dependent cyclic voltammetry (CV) in isothermal and non-isothermal cells was investigated in depth, and the Se values compared to those from thermo-electromotive force measurements. Within experimental error, the Se values derived from CV methods were found to be in accordance with those obtained from electromotive force (emf) measurements. The applicability of cyclic voltammetry techniques for determining Se when employing only one part of the redox couple was demonstrated.
Language eng
DOI 10.1016/j.electacta.2015.10.070
Field of Research 030604 Electrochemistry
03 Chemical Sciences
09 Engineering
02 Physical Sciences
Socio Economic Objective 850599 Renewable Energy not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Grant ID ARC CE140100012
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30079838

Document type: Journal Article
Collection: Institute for Frontier Materials
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