Li Jiashuang, Li Jingjing, Li Hongbin, Wang Chengcheng, Sheng Mingfei, Zhang Liping, Fu Shaohai
Key Laboratory of Science & Technology of Eco-Textile, Jiangnan University, Ministry of Education, Wuxi, Jiangsu 214122, China.
The First Scientific Research Institute of Wuxi, Wuxi, Jiangsu 214122, China.
ACS Appl Mater Interfaces. 2021 Jun 16;13(23):27200-27208. doi: 10.1021/acsami.1c05768. Epub 2021 Jun 1.
The diversification of electrochromic materials greatly expands the application fields of electrochromic devices. However, highly flexible electrochromic materials remain challenging due to the inherent limitations associated with the existing electrochromic processes. Inspired by the hydrogen bonding effect in the hydrogel structure, a highly elastic and bistable electrochromic ionic gel based on a hydrogen bonding cross-linking network is prepared by solution polymerization having excellent tensile resilience, uniform coloring, reversible switching (≤24.3 s), maximum transmittance change (≥80%), bistability (54 h), reversibility (>500 cycles), and coloration efficiency (≥85.3 cm·C). This method has been used to develop bistable electrochromic displays. The unconventional exploration of the bistable design principle may provide a new idea for the realization of bistable electrochromic devices.
电致变色材料的多样化极大地拓展了电致变色器件的应用领域。然而，由于现有电致变色过程存在固有限制，制备高度柔性的电致变色材料仍然具有挑战性。受水凝胶结构中氢键效应的启发，通过溶液聚合制备了一种基于氢键交联网络的高弹性双稳态电致变色离子凝胶，该凝胶具有优异的拉伸回弹性、均匀着色、可逆切换（≤24.3秒）、最大透过率变化（≥80%）、双稳态（54小时）、可逆性（>500次循环）和显色效率（≥85.3厘米·库仑）。该方法已用于开发双稳态电致变色显示器。对双稳态设计原理的非常规探索可能为实现双稳态电致变色器件提供新思路。
