File(s) under permanent embargo
High mobility I− / I3− redox couple in a molecular plastic crystal: A potential new generation of electrolyte for solid-state photoelectrochemical cells
journal contributionposted on 31.01.2006, 00:00 authored by Q Dai, D MacFarlane, Maria ForsythMaria Forsyth
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.
JournalSolid state ionics
Pagination395 - 401
LocationAmsterdam, The Netherlands
Publication classificationC1.1 Refereed article in a scholarly journal
Copyright notice2005, Elsevier B.V.
Read the peer-reviewed publication
solid electrolytediffusioniodide\/tri-iodideionic conductivity and plastic crystalScience & TechnologyPhysical SciencesChemistry, PhysicalPhysics, Condensed MatterChemistryPhysicsSENSITIZED SOLAR-CELLMETHYL-N-ALKYLPYRROLIDINIUMFAST-ION CONDUCTIONMOLTEN-SALTSCONVERSION EFFICIENCIESPOLYMER ELECTROLYTEPHOTOVOLTAIC CELLSCHARGE-SEPARATIONENERGY CONVERSIONTITANIUM-DIOXIDE