Affiliation:
1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China
2. Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education Donghua University Shanghai 201620 China
Abstract
AbstractElectrochromic technology that enables modulation of a material's optical properties by application of an applied voltage is utilized in smart windows. However, avoiding water absorption by lithium salt in the electrolyte necessitates complex encapsulated device assemblies that must be constructed under strict atmosphere conditions and are largely unrepairable. Herein, a lithium‐salt‐free, hydrophobic, solid‐state poly(ionic liquid) electrolyte based on strong C─F bonds that exhibits low polarizability, low moisture absorption, and a wide electrochemical window, allowing the fabrication of unencapsulated electrochromic devices with outstanding long‐term cycling and environmental stability are presented. Intimate contact between the electrolyte and the electrode is achieved through integrated in situ polymerization, providing an interface with multiple molecular interactions that impart robust adhesion, efficient ion transport, and excellent stability. To demonstrate the potential of this electrolyte for cost‐effective electrochromic smart windows, low‐cost (≈110 USD m−2), unencapsulated, removable, electrochromic “window tint film” with customizable dimensions and shapes are fabricated.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Science and Technology Commission of Shanghai Municipality
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials