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Article Dans Une Revue New Journal of Chemistry Année : 2014

One−pot Route To Class II Hybrid Ionogels Electrolytes

Résumé

A new system based on class II hybrid ionogels (Si-IL gels) has been developed for overcoming leaking problems associated with liquid electrolytes in dye-sensitized solar cells (DSSCs). We co-condensed a silica precursor with an alkoxysilane functionalized ionic liquid precursor, under acidic conditions, to obtain a hybrid ionogel where ionic liquid is covalently linked to silica domains. The morphology and the microstructure of the Si-IL xerogels were explored using NMR, SAXS and field emission scanning electron microscopy (FE-SEM). Cyclic voltammetry experiments were carried out to measure the apparent diffusion coefficient of the redox couple I−/I3− into these Si-IL gels. The diffusion coefficient of triiodide in the gel is comparable to the one observed in a solvent-free based ionic liquid electrolyte. These Si-IL gels were evaluated as electrolytes in quasi-solid-state DSSCs. For this purpose, various DSSCs have been fabricated. The cells containing Si-IL ionogels with 50 wt% of a silica modified liquid ionic precursor exhibit a short-circuit photocurrent of 2.8 mA cm−2, an open circuit voltage of 680 mV, a fill factor of 0.65, and an overall efficiency of 1.25%. Accordingly, this work constitutes a proof of concept.

Domaines

Matériaux
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Dates et versions

hal-00922351 , version 1 (26-12-2013)

Identifiants

Citer

Olivier Fontaine, Amina Touidjine, Manuel Maréchal, Christian Bonhomme, François Ribot, et al.. One−pot Route To Class II Hybrid Ionogels Electrolytes. New Journal of Chemistry, 2014, 38 (5), pp.2008-2015. ⟨10.1039/C3NJ01272G⟩. ⟨hal-00922351⟩
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