| 초록 |
Electrochemical devices include electrolytes as a fundamental component. Ideal electrolytes are required to have both high ionic conductivity and mechanical robustness. Herein, we suggest a simple but effective strategy for preparing ion gels consisting of random copolymers and room temperature ionic liquids. The resulting ion gels simultaneously exhibited high ionic conductivity (~1.15 mS/cm) and large elastic modulus (~0.105 MPa) at room temperature. To demonstrate the versatility of the gels as solid-state electrolytes, they are applied to electrochromic devices (ECDs) with anodic species (dimethyl ferrocene, dmFc) and electrochromic (EC) materials (ethyl viologen, EV2+). The ECDs showed low-voltage operation, large optical transmittance contrast, and good cyclic coloration/bleaching stability. Moreover, to take advantage of the mechanical resilience of the gels, we fabricated flexible ECDs and they showed outstanding bending stability irrespective of bending directions. |
