电致变色
材料科学
超级电容器
电容
储能
光电子学
扩散
电致变色装置
纳米技术
透射率
分析化学(期刊)
电极
功率(物理)
热力学
有机化学
物理化学
化学
物理
作者
Seon Yeong Kim,Yeon Jae Jang,Yong Min Kim,Jae Kyeong Lee,Hong Chul Moon
标识
DOI:10.1002/adfm.202200757
摘要
Abstract Electrochromic (EC) energy storage devices represent a cutting‐edge technology visually indicating stored energy status in real time through color change. Herein, extremely simple single‐layer electrochromic supercapacitors (SL‐ECSs) based on energy storage EC ion gels are proposed. The operation of SL‐ECSs follows Fick's law because of the diffusive nature of mass transport of all redox species. Therefore, the diffusion dynamics are tuned by tailoring fundamental parameters, the diffusion coefficient, and concentration gradient, and the availability of energy storage is maximized by reducing residual charges that cannot be extracted during the normal discharge process. In terms of the two critical metrics of ECSs, areal capacitance ( C areal ) and transmittance contrast between charged and discharged states (Δ T ), the performance of SL‐ECSs ( C areal ≈ 43.0 mF cm –2 and Δ T ≈ 96.8%) is favorably compared with previously reported ECSs. The capacitance retention remains at >80% even after continuous charge/discharge cyclic operations for 3000 min without specific encapsulation. Moreover, the practical multi‐functionality of the SL‐ECS is successfully demonstrated as a power source and applied force monitoring platform. It is expected that the SL‐ECS will be a simple but versatile component of high‐performance, ultra‐small functional electronics.
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