摘要
WO_(3)是理想的无机电致变色材料,其电致变色机制是在电压作用下发生可逆的氧化还原反应,并伴随着电解质离子在材料内部的嵌入和脱出。本文研究了含有Li^(+)、Zn^(2+)、Al^(3+)的三种水系电解质对无定形WO_(3)电致变色性能的影响。结果表明,当以Al^(3+)作为嵌入离子时,WO_(3)获得了最好的电致变色性能,包括快响应速度(着色响应时间2.8 s,褪色响应时间1.1 s)、大光学对比度(700 nm处达83.4%)、优异的循环稳定性(连续循环1000次仅衰减2.8%)、高着色效率(74.7 cm^(2)·C^(-1)),其综合性能在已报道的WO_(3)电致变色器件中处于较高水平。机制研究发现,Al^(3+)水系电解质溶液中性能的提升得益于快速的离子传输动力学。这些结果将为高性能电致变色器件构建和电解质优选提供简单有效的指导。
WO_(3) is an ideal inorganic electrochromic material.Its electrochromic mechanism is reversible redox reaction under the driving of voltage,accompanied by the insertion and extraction of counterions in the material.In this paper,we investigated the electrochromic properties of amorphous WO_(3) in three aqueous electrolyte solutions of Li,Zn and Al.WO_(3) achieves the best electrochromic performances when Al^(3+)was used as insertion ions,including fast response speed(2.8 s for coloring and 1.1 s for decolorization),large optical contrast(83.4% at 700 nm),good cycling stability(2.8% decay for 1000 successive cycles),high coloration efficiency(74.7 cm^(2)·C^(-1)),and its comprehensive performance is at high level among the reported WO_(3) electrochromic devices.Mechanistic studies have revealed that the enhanced performance in Al^(3+)electrolytes is due to the fast ion transport kinetics.These results will provide a simple and effective guidance for the construction of high-performance electrochromic devices and the optimization of electrolytes.
作者
邢开笑
吕哲
李颜涛
吕营
李盼
闫靖宇
刘彬
李晟泽
刘星元
XING Kaixiao;LYU Zhe;LI Yantao;LYU Ying;LI Pan;YAN Jingyu;LIU Bin;LI Shengze;LIU Xingyuan(State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Mathematics,Jilin University,Changchun 130012,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2023年第8期1404-1412,共9页
Chinese Journal of Luminescence
基金
吉林省优秀青年科技人才项目(应用技术类)(20230508109RC)
国家自然科学基金(61875195)。
