二氧化硅增强复合电解质的电致变色纤维
Electrochromic fibers enhanced by silica-reinforced composite electrolytes
翟凯悦 1范庆超 1吴锡录 1侯成义 1张青红 1李耀刚 1王宏志 1李克睿1
作者信息
- 1. 东华大学 材料科学与工程学院,纤维材料改性国家重点实验室,上海
- 折叠
摘要
具有光反射调节的电致变色纤维在智能服装、自适应伪装等领域具有广阔的应用前景,但现有的电致变色纤维在实际应用中仍面临电化学稳定性差、切换速度慢等问题.使用 SiO2 纳米颗粒对电致变色电解质进行改性,对基于改性电解质制备的电致变色纤维的光学性能、电化学性能进行讨论,同时分析SiO2 纳米颗粒对变色材料稳定性的影响.结果显示:SiO2 改性电致变色纤维的着色效率达 53.1 cm2/C,展现出较快的切换速度(22.9/12.6 s);300 个电化学循环后,仍具有良好的变色稳定性(光学反射对比度保持初始值的 58.3%).未掺杂 SiO2 改性的电致变色纤维的着色效率(20.2 cm2/C)较低、切换速度(34.7/38.4 s)较慢.此外,电致变色纤维器件具有优异的机械柔性,在可穿戴显示等领域展现出潜在的应用价值.
Abstract
Electrochromic(EC)fibers hold significant potential in applications such as smart clothing and adaptive camouflage.However,EC fibers still encounter challenges in practical applications,such as poor electrochemical stability and slow switching speed.The EC electrolyte was modified by SiO2 nanoparticles to address these issues.The optical and electrochemical properties of EC fibers fabricated with the modified electrolyte were investigated and discussed,and the influence of SiO2 nanoparticles on the stability of the color-changing material was analyzed.The results show that the coloration efficiency of SiO2-modified EC fibers reach 53.1 cm2/C,accompanied by a rapid switching speed(22.9/12.6 s).Even after 300 electrochemical cycles,the device maintained excellent coloration stability(optical reflective contrast maintains 58.3%of the initial value).Undoped SiO2-modified EC fibers show lower coloring efficiency(20.2 cm2/C)and slower switching speed(34.7/38.4 s).Additionally,the mechanical properties of EC fiber devices are excellent,demonstrating potential application value in wearable devices.
关键词
SiO2/电致变色/纤维/变色稳定性/变色切换速度Key words
SiO2/electrochromism/fiber/coloration stability/color change switching speed引用本文复制引用
基金项目
科技部重点研发计划(2022YFB3902700)
上海市自然科学基金面上项目(23ZR1400400)
出版年
2024
NETL
NSTL
万方数据