期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 240, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.solmat.2022.111657
关键词
Gel electrolyte; UV curable; Vinyl acetate; Electrochromic device; Smart windows
资金
- ECO-sustainable and intelligent fibers and fabrics for TEChnic clothing (ECOTEC), PON RI 2014-2020 [ARS01_00951, CUP B66C18000300005]
- Progetto FISR - C.N.R. Tecnopolo di nanotecnologia e fotonica per la medicina di precisione [CUP B83B17000010001]
- ARTI [UNISAL034]
In this study, a gel polymer electrolyte (GPE) for large-area electrochromic devices was successfully prepared using two cheap and non-toxic commercial resins. After several investigations and optimizations, the best formulation for fabricating large-area EC devices was found, demonstrating the electrochemical stability of the GPE as an ion-conducting medium.
Solid-state ionic conductors embodying either protons or lithium ions are very attractive for large-area electrochromic (EC) devices. In this work, aiming at the preparation of a gel polymer electrolyte (GPE), two cheaper and non-toxic commercial resins are used: a urethane-based prepolymer (NOA65) and a vinyl acetate-based resin (MASTIFLEX). They are employed as host matrices to trap the liquid constituents, made of lithium perchlorate-propylene carbonate (LiClO4-PC). Thermogravimetric analyses indicate that both resins show excellent thermal performance. Several GPE formulations are investigated with respect to electrical and optical properties, varying the polymer-to-liquid ratio and LiClO4 concentration. The EC devices made with the two GPEs are also char-acterized in terms of optical contrast, switching kinetics and repetitive switching cycles. These activities made it possible to find the best formulations finally employed for the fabrication of 100 cm(2) large area EC devices. The obtained results demonstrate that low-cost GPEs based on commercial polymers are electrochemically stable as ion-conducting media for EC devices.
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