DEVELOPMENT OF ELECTROCHROMIC DEVICES WORKING WITH HYDROPHOBIC LITHIUM ELECTROLYTE

This manuscript report on a new lithium electrolyte, allowing the manufacturing of electrochemical systems, such as electrochromic devices, in ambient atmosphere. It is based on lithium bis ‐trifluoromethane sulfonimide dissolved in the following hydrophobic salt, which was first prepared by M. Grätzel et al. : 1‐ethyl. 3‐methyllimidazolium bis ‐trifluoromethane sulfonimide. We have also successfully tested the compatibility of this electrolyte with WO 3 and TiO 2 ‐CeO 2 films acting respectively as efficient electrochromic electrode and counter electrode for smart‐window working with Li + ions.