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Bistable Elastic Electrochromic Ionic Gels for Energy-Saving Displays.

Jiashuang Li1, Jingjing Li2, Hongbin Li2

  • 1Key Laboratory of Science & Technology of Eco-Textile, Jiangnan University, Ministry of Education, Wuxi, Jiangsu 214122, China.

ACS Applied Materials & Interfaces
|June 1, 2021
PubMed
Summary

Researchers developed a highly elastic, bistable electrochromic ionic gel using hydrogen bonding. This novel material offers excellent resilience and uniform coloring for advanced electrochromic displays.

Keywords:
bistabilityelasticityelectrochromicintelligent displaysionic gel

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Electrochemistry

Background:

  • Electrochromic devices offer tunable optical properties but face challenges in flexibility.
  • Existing electrochromic processes often lack the necessary elasticity for highly flexible applications.

Purpose of the Study:

  • To develop a highly elastic and bistable electrochromic ionic gel.
  • To overcome limitations in current flexible electrochromic materials.

Main Methods:

  • Solution polymerization utilizing a hydrogen bonding cross-linking network.
  • Inspired by the structural properties of hydrogels.

Main Results:

  • The ionic gel exhibits excellent tensile resilience and uniform coloring.
  • Achieved reversible switching in ≤24.3 s, a transmittance change ≥80%, and bistability for 54 h.
  • Demonstrated reversibility over >500 cycles with a coloration efficiency ≥85.3 cm²·C⁻¹.

Conclusions:

  • The developed ionic gel provides a promising pathway for highly flexible and bistable electrochromic devices.
  • The novel bistable design principle may inspire future advancements in electrochromic technology.