Switchable Silver Mirror And Electrochromic Device Based On Poly (Ionic Liquids) And Flexible Displays On Plastic

Electrochromic materials can be used for information display and storage,sensors,smart windows,optical switches,decorative and security protection.However,it is difficult to realize the wide commercialization of electrochromic materials due to the disadvantages of electrolyte,such as volatile,strict encapsulation and degradation.Due to the fragility of glass and some special occasions,the application of flexible electrochromic devices is an urgent misson to carry out.Poly?ionic liquids?with low volatility,high ionic conductivity and wide electrochemical window,has aroused widespread concern in academic and industry.In recent years,ionic liquids and poly?ionic liquids?have unparalleled advantages in the preparation of electrolytes,bringing new hope for this field.In this paper,the gel electrolyte was obtained by introducing poly?ionic liquids?,and it was applied in switchable silver mirror and electrochromic device,and the flexible device was fabricated.The main contents and conclusions of the study were as follows:1.A variety of ionic liquids and poly?ionic liquids?have been synthesized.AgNO₃and the redox mediator were mixed with the poly?ionic liquids?to obtain the gel electrolyte.The device and the flexible device were prepared by spin coating method.A series of performance tests were performed on the device,including transmittance,reflectance,morphology,and cycling stability.The maximum transmittance difference of the switchable mirror device was 82%at room temperature,and the stability of the switchable mirror device was excellent.The resulting flexible device also exhibits a good mirror effect.2.Electrochromic device based on gel state electrolyte was obtained through the addition of poly?ionic liquid?and viologen.A series of performance tests were performed on the device,including transmittance,reflectance,reduction potential,initial current and cycling stability.The maximum transmittance difference of the electrochromic device was81%at room temperature.The flexible electrochromic device also shows good color effect and stability.