Tailoring Diffusion Dynamics in Energy Storage Ionic Conductors for High-Performance, Multi-Function, Single-Layer Electrochromic Supercapacitors
발표자
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초록
내용
We propose extremely simple single-layer electrochromic supercapacitors (SL-ECSs) based on energy storage EC ion gels. The operation of SL-ECSs follows Fick’s law because of the diffusive nature of mass transport of all redox species. Therefore, we tune the diffusion dynamics by tailoring the diffusion coefficient and concentration gradient, and maximize the energy storage by reducing residual charges. In terms of the two critical metrics of ECSs, areal capacitance (Careal) and transmittance contrast (ΔT), the performance of SL-ECSs (Careal ~43.0 mF cm–2 and ΔT ~96.8%) is favorably compared with previously reported ECSs. The capacitance retention remains at ＞ 80% even after continuous cyclic operations for 3000 min. Moreover, we successfully demonstrate the practical multi-functionality of the SL-ECS as a power source and applied force monitoring platform.