nz0c00245_si_002.mp4 (9.26 MB)
Download fileMolecular Level Assembly for High-Performance Flexible Electrochromic Energy-Storage Devices
media
posted on 18.03.2020, 20:19 authored by Guofa Cai, Jingwei Chen, Jiaqing Xiong, Alice Lee-Sie Eh, Jiangxin Wang, Masayoshi Higuchi, Pooi See LeeThe
rational design and scalable assembly of nanoarchitectures
are important to deliver highly uniform, functional films with high
performance. However, fabrication of large-area and high-performance
films is quite difficult because of the challenges in controlling
homogeneous microstructures, interface properties, and the high cost
of the conventional vacuum deposition technique. Here, we report a
solution-processed molecular level assembly approach to fabricate
self-supported (without any binders or conductive additives) large-area
(up to 810 cm2) functional films with controllable thickness
and high homogeneity. We show that the assembled prototypical Fe(II)-based
metallo-supramolecular polymer (polyFe) film exhibits unprecedented
electrochromic performance such as ultrahigh coloration efficiency
(750.3 cm2 C–1), fast switching speed
(<1 s), as well as robust electrochemical stability (with no obvious
degradation after 10 000 cycles). We further demonstrate that
the assembled polyFe films can be used to fabricate a smart energy-storage
indicator, in which the energy-storage level is visually perceptible
and recognizable in real time. This strategy provides an exciting
alternative route for highly scalable fabrication of uniform films
and may extend to other materials for a wide range of functional devices
of diverse applications.
History
Usage metrics
Read the peer-reviewed publication
Categories
Keywords
Electrochromic Energy-Storage Deviceselectrochemical stabilityelectrochromic performancefilm exhibitslevel assembly approach10 000 cyclesscalable assemblyconductive additivesenergy-storage indicatoralternative routevacuum deposition technique810 cm 2polyFe filmsscalable fabricationinterface propertiesenergy-storage leveluniform filmsMolecular Level Assembly10 000