【作者】 李浩；

【导师】 严锋；

【作者基本信息】 苏州大学 ， 化学工程与技术， 2017， 硕士

【摘要】 电致变色材料可以用于信息显示、智能窗、护目镜、光开关、装饰等。但电解质,特别是液体电解质,作为影响电致变色器件的关键性材料之一,存在易挥发、需严格封装、易降解等缺点,使得电致变色材料的广泛商业化难以实现。而且由于玻璃的易碎性和一些特殊场合的需求,开展柔性电致变色器件的研究迫在眉睫。（聚）离子液体具有低挥发性、高的离子导电率以及宽电化学窗口,在电解质制备方面具有无可比拟的优势,引起了学术界和工业界的广泛关注。聚离子液体电解质为电致变色器件带来了新的希望。本文利用（聚）离子液体制备凝胶态电解质,并将其应用于可切换银镜器件、电致变色器件及柔性器件,研究的主要内容如下:1.基于咪唑类（聚）离子液体的可切换银镜和柔性器件的研究。合成咪唑盐类（聚）离子液体,并将其与AgNO₃和氧化还原媒介混合得到凝胶电解质,通过旋转涂抹法制备可切换银镜器件及柔性器件。对器件的透过率、反射率、形貌、循环稳定性进行测试。研究表明制备的基于聚离子液体的可切换银镜器件在室温下的最大透过率差为82%,且具有良好的稳定性;制备的柔性器件也显示出了良好的镜面效果。2.基于咪唑类（聚）离子液体的电致变色和柔性器件的研究。将（聚）离子液体和紫精化合物混合得到的凝胶电解质,制备电致变色器件和柔性电致变色器件。对电致变色器件的透过率、反射率、还原电位、初始电流和循环稳定性进行测试。研究表明,制备的基于聚离子液体凝胶电解质的电致变色器件和柔性电致变色器件均具有较好的变色效果和稳定性,其中电致变色器件的最大透过率差为81%。更多还原

【Abstract】 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.更多还原