A quasi‐solid‐state tristate reversible electrochemical mirror device with enhanced stability
Reversible electrochemical mirror (REM) electrochromic devices with electrochemical tunability in multiple optical states are exciting alternatives to conventional electrochromic smart windows. Electrochromic devices are studied extensively, yet widespread adoptions have not been achieved due to pro...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/145574 |
| _version_ | 1824453478411403264 |
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| author | Eh, Alice Lee-Sie Chen, Jingwei Yu, Shu Hearn Thangavel, Gurunathan Zhou, Xinran Cai, Guofa Li, Shaohui Chua, Daniel H. C. Lee, Pooi See |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Eh, Alice Lee-Sie Chen, Jingwei Yu, Shu Hearn Thangavel, Gurunathan Zhou, Xinran Cai, Guofa Li, Shaohui Chua, Daniel H. C. Lee, Pooi See |
| author_sort | Eh, Alice Lee-Sie |
| collection | NTU |
| description | Reversible electrochemical mirror (REM) electrochromic devices with electrochemical tunability in multiple optical states are exciting alternatives to conventional electrochromic smart windows. Electrochromic devices are studied extensively, yet widespread adoptions have not been achieved due to problems associated with durability, switching speed, limited options on optical states, and cost. In this study, a REM electrochromic device based on CuSn alloy is developed, which offers highly reversible switching between transparent, greyish‐blue, and mirror states via reversible electrodeposition and dissolution. The alloying element, Sn acts as an electrochemical mediator, which facilitates the electrodeposition and dissolution of Cu. The CuSn‐based REM device shows superior cycling stability for 2400 cycles (transmittance mode) and 1000 cycles (reflectance mode). The electrodeposited CuSn alloy film is resistant to surface oxidation in ambient air, with a 2.9% difference in reflectance at 2000 nm after 3 days. In addition, the alloy film exhibits excellent NIR reflectance property with thermal modulation of 18.5 °C at a high temperature of 180 °C. The REM device with zero power consumption maintains its mirror state for at least 100 min, making it a promising candidate for energy‐efficient applications. |
| first_indexed | 2025-02-19T03:07:03Z |
| format | Journal Article |
| id | ntu-10356/145574 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:07:03Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1455742023-07-14T15:54:55Z A quasi‐solid‐state tristate reversible electrochemical mirror device with enhanced stability Eh, Alice Lee-Sie Chen, Jingwei Yu, Shu Hearn Thangavel, Gurunathan Zhou, Xinran Cai, Guofa Li, Shaohui Chua, Daniel H. C. Lee, Pooi See School of Materials Science and Engineering Engineering::Materials Cycling Stability Electrochemical Mediators Reversible electrochemical mirror (REM) electrochromic devices with electrochemical tunability in multiple optical states are exciting alternatives to conventional electrochromic smart windows. Electrochromic devices are studied extensively, yet widespread adoptions have not been achieved due to problems associated with durability, switching speed, limited options on optical states, and cost. In this study, a REM electrochromic device based on CuSn alloy is developed, which offers highly reversible switching between transparent, greyish‐blue, and mirror states via reversible electrodeposition and dissolution. The alloying element, Sn acts as an electrochemical mediator, which facilitates the electrodeposition and dissolution of Cu. The CuSn‐based REM device shows superior cycling stability for 2400 cycles (transmittance mode) and 1000 cycles (reflectance mode). The electrodeposited CuSn alloy film is resistant to surface oxidation in ambient air, with a 2.9% difference in reflectance at 2000 nm after 3 days. In addition, the alloy film exhibits excellent NIR reflectance property with thermal modulation of 18.5 °C at a high temperature of 180 °C. The REM device with zero power consumption maintains its mirror state for at least 100 min, making it a promising candidate for energy‐efficient applications. National Research Foundation (NRF) Published version This research was supported by the National Research Foundation, the Prime Minister’s Office, Singapore, under its Campus for Research Excellence and Technological Enterprise (CREATE) program. 2020-12-29T03:11:52Z 2020-12-29T03:11:52Z 2020 Journal Article Eh, A. L.-S., Chen, J., Yu, S. H., Thangavel, G., Zhou, X., Cai, G., . . . Lee, P. S. (2020). A quasi‐solid‐state tristate reversible electrochemical mirror device with enhanced stability. Advanced Sciencel, 7(13), 1903198-. doi:10.1002/advs.201903198 2198-3844 https://hdl.handle.net/10356/145574 10.1002/advs.201903198 32670746 13 7 en Advanced Science © 2020 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. application/pdf |
| spellingShingle | Engineering::Materials Cycling Stability Electrochemical Mediators Eh, Alice Lee-Sie Chen, Jingwei Yu, Shu Hearn Thangavel, Gurunathan Zhou, Xinran Cai, Guofa Li, Shaohui Chua, Daniel H. C. Lee, Pooi See A quasi‐solid‐state tristate reversible electrochemical mirror device with enhanced stability |
| title | A quasi‐solid‐state tristate reversible electrochemical mirror device with enhanced stability |
| title_full | A quasi‐solid‐state tristate reversible electrochemical mirror device with enhanced stability |
| title_fullStr | A quasi‐solid‐state tristate reversible electrochemical mirror device with enhanced stability |
| title_full_unstemmed | A quasi‐solid‐state tristate reversible electrochemical mirror device with enhanced stability |
| title_short | A quasi‐solid‐state tristate reversible electrochemical mirror device with enhanced stability |
| title_sort | quasi solid state tristate reversible electrochemical mirror device with enhanced stability |
| topic | Engineering::Materials Cycling Stability Electrochemical Mediators |
| url | https://hdl.handle.net/10356/145574 |
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