Flexible hybrid electrochromic zinc battery

Electrochromic batteries, with simultaneous colour-changing and energy-storage capabilities, have great commercial interest, ranging from renewable energy systems, electric vehicles to consumer electronics. Recently, the development of these devices has skewed towards those that could conform to non...

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Main Author: Poh, Wei Church
Other Authors: Lee Pooi See
Format: Thesis-Doctor of Philosophy
Language:English
Published: Nanyang Technological University 2023
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Online Access:https://hdl.handle.net/10356/168635
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1686352023-07-04T01:52:12Z Flexible hybrid electrochromic zinc battery Poh, Wei Church Lee Pooi See School of Materials Science and Engineering PSLee@ntu.edu.sg Engineering::Materials::Energy materials Engineering::Materials::Composite materials Engineering::Materials::Organic/Polymer electronics Electrochromic batteries, with simultaneous colour-changing and energy-storage capabilities, have great commercial interest, ranging from renewable energy systems, electric vehicles to consumer electronics. Recently, the development of these devices has skewed towards those that could conform to non-planar and curvature surfaces, as to cater to the rising demand for futuristic wearables such as energy-saving wearable displays and expressive garments. However, the current bottleneck in conformable devices lies in their poor mechanical durability due to limited availability of suitable materials. In this dissertation, efforts are invested in developing a flexible electrochromic zinc battery based on innovative designs and selection of materials. The undertaking was first approached by studying the prospect of chemically anchored electrochromic materials via electropolymerization process. Particularly, electropolymerizable iron-centred coordination polymer has been deployed, showing not only effective in manipulating thicknesses and surface morphologies, but also demonstrated robust electrochromic and cathodic performances. Despite these promising features, the construction of flexible devices is still limited by a lack of suitable electrolyte and substrate. Traditional liquid and gel electrolytes are not competent due to their poor environmental stability, leakage tendency and poor processability. Considering the low oxygen solubilities of poly(ionic liquid)s, solid-state ionogels were developed via facile in-situ photopolymerization approach, establishing electrolytes with high transparency, stretchability and excellent physicochemical stabilities (e.g., thermal, electrochemical and air stability). Benefitting from the versatility of the materials, they were modified to tailor for an electrochromic Zn battery. By coupling with zinc mesh anode, the compatibilized materials were readily assembled on an ultra-thin-ITO glass, realizing a flexible EC battery device that delivers a capacity of 19.3 mAh m-2 at 0.01 mA cm-2 which could be bent repeatedly with minimal damage and powering up a wireless portable device, paving the road towards the advancement of wearable electronics. Doctor of Philosophy 2023-06-14T07:36:09Z 2023-06-14T07:36:09Z 2023 Thesis-Doctor of Philosophy Poh, W. C. (2023). Flexible hybrid electrochromic zinc battery. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/168635 https://hdl.handle.net/10356/168635 10.32657/10356/168635 en This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials::Energy materials
Engineering::Materials::Composite materials
Engineering::Materials::Organic/Polymer electronics
spellingShingle Engineering::Materials::Energy materials
Engineering::Materials::Composite materials
Engineering::Materials::Organic/Polymer electronics
Poh, Wei Church
Flexible hybrid electrochromic zinc battery
description Electrochromic batteries, with simultaneous colour-changing and energy-storage capabilities, have great commercial interest, ranging from renewable energy systems, electric vehicles to consumer electronics. Recently, the development of these devices has skewed towards those that could conform to non-planar and curvature surfaces, as to cater to the rising demand for futuristic wearables such as energy-saving wearable displays and expressive garments. However, the current bottleneck in conformable devices lies in their poor mechanical durability due to limited availability of suitable materials. In this dissertation, efforts are invested in developing a flexible electrochromic zinc battery based on innovative designs and selection of materials. The undertaking was first approached by studying the prospect of chemically anchored electrochromic materials via electropolymerization process. Particularly, electropolymerizable iron-centred coordination polymer has been deployed, showing not only effective in manipulating thicknesses and surface morphologies, but also demonstrated robust electrochromic and cathodic performances. Despite these promising features, the construction of flexible devices is still limited by a lack of suitable electrolyte and substrate. Traditional liquid and gel electrolytes are not competent due to their poor environmental stability, leakage tendency and poor processability. Considering the low oxygen solubilities of poly(ionic liquid)s, solid-state ionogels were developed via facile in-situ photopolymerization approach, establishing electrolytes with high transparency, stretchability and excellent physicochemical stabilities (e.g., thermal, electrochemical and air stability). Benefitting from the versatility of the materials, they were modified to tailor for an electrochromic Zn battery. By coupling with zinc mesh anode, the compatibilized materials were readily assembled on an ultra-thin-ITO glass, realizing a flexible EC battery device that delivers a capacity of 19.3 mAh m-2 at 0.01 mA cm-2 which could be bent repeatedly with minimal damage and powering up a wireless portable device, paving the road towards the advancement of wearable electronics.
author2 Lee Pooi See
author_facet Lee Pooi See
Poh, Wei Church
format Thesis-Doctor of Philosophy
author Poh, Wei Church
author_sort Poh, Wei Church
title Flexible hybrid electrochromic zinc battery
title_short Flexible hybrid electrochromic zinc battery
title_full Flexible hybrid electrochromic zinc battery
title_fullStr Flexible hybrid electrochromic zinc battery
title_full_unstemmed Flexible hybrid electrochromic zinc battery
title_sort flexible hybrid electrochromic zinc battery
publisher Nanyang Technological University
publishDate 2023
url https://hdl.handle.net/10356/168635
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