High mobility I− / I3− redox couple in a molecular plastic crystal: A potential new generation of electrolyte for solid-state photoelectrochemical cells

Dai, Qing, MacFarlane, Douglas R. and Forsyth, Maria 2006, High mobility I− / I3− redox couple in a molecular plastic crystal: A potential new generation of electrolyte for solid-state photoelectrochemical cells, Solid state ionics, vol. 177, no. 3-4, pp. 395-401.

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Title High mobility I− / I3− redox couple in a molecular plastic crystal: A potential new generation of electrolyte for solid-state photoelectrochemical cells
Formatted title High mobility I / I3 redox couple in a molecular plastic crystal : a potential new generation of electrolyte for solid-state photoelectrochemical cells
Author(s) Dai, Qing
MacFarlane, Douglas R.
Forsyth, Maria
Journal name Solid state ionics
Volume number 177
Issue number 3-4
Start page 395
End page 401
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2006-01-31
ISSN 0167-2738
1872-7689
Keyword(s) solid electrolyte
diffusion
iodide/tri-iodide
ionic conductivity and plastic crystal
Summary A series of new electrolyte materials based on a molecular plastic crystal doped by different iodide salts together with iodine have been prepared and characterized by thermal analysis, ionic conductivity, electrochemical and solid-state NMR diffusion measurements. In these materials, the plastic crystal phase of succinonitrile acts as a good matrix for the quaternary ammonium based iodides and iodine and appears to act in some cases as a solid-state “solvent” for the binary dopants. The materials were prepared by mixing the components in the molten state with subsequent cooling into the plastic crystalline state. This resulted in waxy-solid electrolytes in the temperature range from − 40 to 60 °C. The combination of structural variation of the cations, and fast redox couple diffusion (comparable with liquid-based electrolytes), as well as a high ionic conductivity of up to 3 × 10− 3 S cm− 1 at ambient temperature, make these materials very attractive for potential use in solid-state photoelectrochemical cells.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2005, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030094

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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