New electrolytes for solar battery based on imidazolium and piperidinium cations

Abstract

For electrochemical applications at high temperatures, a series of imidazolium and piperidinium -based cations with different anions were synthesized and studied as electrolytes for solar battery. The syntheses are based on a dialkylation reaction of methylimdazole and N-alkylpiperidine followed by anion exchange. The structures of ILs, were identified by using 1H, 13C, 19F, 31P NMR and FT-IR spectroscopy. Their physicochemical and dielectric properties, including melting point, thermal stability, conductivity, and activation energies are determined. The thermal investigations have revealed that the melting points were slightly higher than 100°C, which may be interest for solid electrolyte applications. The obtained results encourage us to use the imidazolium with other anions in view to synthesis ILs with better dielectric properties for electrochemical application