Molecular level assembly for high-performance flexible electrochromic energy-storage devices

The 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, inter...

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Main Authors: Cai, Guofa, Chen, Jingwei, Xiong, Jiaqing, Eh, Alice Lee-Sie, Wang, Jiangxin, Higuchi, Masayoshi, Lee, Pooi See
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/149774
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1497742021-05-20T05:24:21Z Molecular level assembly for high-performance flexible electrochromic energy-storage devices Cai, Guofa Chen, Jingwei Xiong, Jiaqing Eh, Alice Lee-Sie Wang, Jiangxin Higuchi, Masayoshi Lee, Pooi See School of Materials Science and Engineering Engineering::Materials Electrical Properties Optical Properties The 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 cm ) 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 cm C ), fast switching speed (<1 s), as well as robust electrochemical stability (with no obvious degradation after 10000 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. National Research Foundation (NRF) This work was financially supported by the Campus for Research Excellence and Technological Enterprise (CREATE) programme under the National Research Foundation, Prime Minister’s Office, Singapore; the Competitive Research Programme under NRF-CRP-13-2014-02; NRF-Investigatorship under NRF-NRFI2016-05; the National Natural Science Foundation of China (51902086); and the CREST project (Grant Number: JPMJCR1533) under the Japan Science and Technology Agency 2021-05-20T05:24:20Z 2021-05-20T05:24:20Z 2020 Journal Article Cai, G., Chen, J., Xiong, J., Eh, A. L., Wang, J., Higuchi, M. & Lee, P. S. (2020). Molecular level assembly for high-performance flexible electrochromic energy-storage devices. ACS Energy Letters, 5(4), 1159-1166. https://dx.doi.org/10.1021/acsenergylett.0c00245 2380-8195 0000-0001-9877-1134 0000-0003-1383-1623 https://hdl.handle.net/10356/149774 10.1021/acsenergylett.0c00245 2-s2.0-85083890188 4 5 1159 1166 en NRF-CRP-13-2014-02 NRF-NRFI2016-05 ACS Energy Letters © 2020 American Chemical Society (ACS). All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
Electrical Properties
Optical Properties
spellingShingle Engineering::Materials
Electrical Properties
Optical Properties
Cai, Guofa
Chen, Jingwei
Xiong, Jiaqing
Eh, Alice Lee-Sie
Wang, Jiangxin
Higuchi, Masayoshi
Lee, Pooi See
Molecular level assembly for high-performance flexible electrochromic energy-storage devices
description The 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 cm ) 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 cm C ), fast switching speed (<1 s), as well as robust electrochemical stability (with no obvious degradation after 10000 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.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Cai, Guofa
Chen, Jingwei
Xiong, Jiaqing
Eh, Alice Lee-Sie
Wang, Jiangxin
Higuchi, Masayoshi
Lee, Pooi See
format Article
author Cai, Guofa
Chen, Jingwei
Xiong, Jiaqing
Eh, Alice Lee-Sie
Wang, Jiangxin
Higuchi, Masayoshi
Lee, Pooi See
author_sort Cai, Guofa
title Molecular level assembly for high-performance flexible electrochromic energy-storage devices
title_short Molecular level assembly for high-performance flexible electrochromic energy-storage devices
title_full Molecular level assembly for high-performance flexible electrochromic energy-storage devices
title_fullStr Molecular level assembly for high-performance flexible electrochromic energy-storage devices
title_full_unstemmed Molecular level assembly for high-performance flexible electrochromic energy-storage devices
title_sort molecular level assembly for high-performance flexible electrochromic energy-storage devices
publishDate 2021
url https://hdl.handle.net/10356/149774
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