This technology involves applying an aqueous composition containing a polyelectrolyte, an acrylate-based host polymer, a crosslinking agent, and a photoinitiator, followed by UV irradiation to form a solid electrolyte matrix in film form.
Conventional sol-gel methods or thermal curing processes have struggled with large-area roll-to-roll coating due to the low viscosity of the compositions. Furthermore, they faced technical limitations, including environmental restrictions related to the use of organic solvents and the need for complex encapsulation processes.
This technology ensures eco-friendliness by using water-based solvents, enables large-area coating by leveraging the high viscosity of the polyelectrolyte, and reduces processing time through UV curing. By adjusting the mixing ratio and molecular weight of the acrylate host and PSSA, it achieves an ionic conductivity of 1×10^-3 S/cm or higher and a transmittance of 80% or more. Applicable to electrochromic smart windows, transparent thin-film batteries, and flexible ion devices, it allows for continuous roll-to-roll production with just seconds of UV exposure.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of energy-saving large-area smart films featuring UV/IR blocking and 35% variable transmittance based on organic electronic materials.
US12215175B2
