Gelové polymerní elektrolyty pro elektrochromní prvky

Abstract

Předkládaná práce se zabývá výzkumem nových materiálů a metod přípravy gelových polymerních elektrolytů (GPE) na bázi methakrylátů, které lze zejména vzhledem k jejich mechanickým vlastnostem s výhodou využít při konstrukci elektrochromních (EC) prvků.This work deals with the research on the methacrylate based gel polymer electrolytes (GPEs) primarily but not solely designed for use in electrochromic (EC) devices, but also in other Li-ion applications. An EC device comprises an active solar control film whose transmittance in the visible and near IR part of the spectrum can be reversibly modulated by a low DC voltage. The poly(methyl methacrylate) PMMA based redox electrolyte with I3-/I- pair was introduced. The method of in-situ thermal polymerization of the gel was used to prepare a hybrid FTO|WO3|redox GPE|Pt|FTO cell in a vacuum bag. The relationship between the electrolyte composition and the parameters such as change of transmittance, response time and stability was discussed based on results from coupled optoelectrochemical measurements. The hybrid EC cell showed moderate optical modulation (ca 30 % of dT at 634 nm), slow initial state recovery and relatively low coloration efficiency (10.5 cm2/C). On the other hand the switching speeds (