Engineering of solvation entropy by poly(4-styrenesulfonic acid) additive in an aqueous electrochemical system for enhanced low-grade heat harvesting
The thermally regenerative electrochemical cycle (TREC) is a reliable and efficient approach to converting low-grade heat into electricity. A high temperature coefficient (α) is the key to maximize the energy conversion efficiency of the TREC system. In this study, we present significant improvement...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/171429 |
| _version_ | 1811690939569143808 |
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| author | Li, Jia Li, Xiaoya Lee, Donghoon Yun, Jeonghun Wu, Angyin Jiang, Cheng Lee, Seok Woo |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Li, Jia Li, Xiaoya Lee, Donghoon Yun, Jeonghun Wu, Angyin Jiang, Cheng Lee, Seok Woo |
| author_sort | Li, Jia |
| collection | NTU |
| description | The thermally regenerative electrochemical cycle (TREC) is a reliable and efficient approach to converting low-grade heat into electricity. A high temperature coefficient (α) is the key to maximize the energy conversion efficiency of the TREC system. In this study, we present significant improvement of α of a Prussian blue analogue (PBA)-based electrochemical cell by adding poly(4-styrenesulfonic acid) (PSS) to the electrolyte. Raman spectra showed that water-soluble charged polymers strongly affect the ion hydration structure and increase the entropy change (ΔS) during ion intercalation in PBA. A large α of -2.01 mV K-1 and high absolute heat-to-electricity conversion efficiency up to 1.83% was achieved with a TREC cell in the temperature range 10-40 °C. This study provides a fundamental understanding of the origin of α and a facile method to boosting the temperature coefficient for building a highly efficient low-grade heat harvesting system. |
| first_indexed | 2024-10-01T06:11:58Z |
| format | Journal Article |
| id | ntu-10356/171429 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:11:58Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1714292023-10-25T06:10:02Z Engineering of solvation entropy by poly(4-styrenesulfonic acid) additive in an aqueous electrochemical system for enhanced low-grade heat harvesting Li, Jia Li, Xiaoya Lee, Donghoon Yun, Jeonghun Wu, Angyin Jiang, Cheng Lee, Seok Woo School of Electrical and Electronic Engineering Rolls-Royce@NTU Corporate Lab Engineering::Electrical and electronic engineering Low-Grade Heat Harveting Thermally Regenerative Electrochemical Cycle The thermally regenerative electrochemical cycle (TREC) is a reliable and efficient approach to converting low-grade heat into electricity. A high temperature coefficient (α) is the key to maximize the energy conversion efficiency of the TREC system. In this study, we present significant improvement of α of a Prussian blue analogue (PBA)-based electrochemical cell by adding poly(4-styrenesulfonic acid) (PSS) to the electrolyte. Raman spectra showed that water-soluble charged polymers strongly affect the ion hydration structure and increase the entropy change (ΔS) during ion intercalation in PBA. A large α of -2.01 mV K-1 and high absolute heat-to-electricity conversion efficiency up to 1.83% was achieved with a TREC cell in the temperature range 10-40 °C. This study provides a fundamental understanding of the origin of α and a facile method to boosting the temperature coefficient for building a highly efficient low-grade heat harvesting system. S. W. L. acknowledges that this study is supported under the RIE2020 Industry Alignment Fund−Industry Collaboration Projects (IAF-ICP) Funding Initiative. 2023-10-25T06:10:02Z 2023-10-25T06:10:02Z 2023 Journal Article Li, J., Li, X., Lee, D., Yun, J., Wu, A., Jiang, C. & Lee, S. W. (2023). Engineering of solvation entropy by poly(4-styrenesulfonic acid) additive in an aqueous electrochemical system for enhanced low-grade heat harvesting. Nano Letters, 23(13), 6164-6170. https://dx.doi.org/10.1021/acs.nanolett.3c01764 1530-6984 https://hdl.handle.net/10356/171429 10.1021/acs.nanolett.3c01764 37368326 2-s2.0-85164299019 13 23 6164 6170 en Nano Letters © 2023 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Low-Grade Heat Harveting Thermally Regenerative Electrochemical Cycle Li, Jia Li, Xiaoya Lee, Donghoon Yun, Jeonghun Wu, Angyin Jiang, Cheng Lee, Seok Woo Engineering of solvation entropy by poly(4-styrenesulfonic acid) additive in an aqueous electrochemical system for enhanced low-grade heat harvesting |
| title | Engineering of solvation entropy by poly(4-styrenesulfonic acid) additive in an aqueous electrochemical system for enhanced low-grade heat harvesting |
| title_full | Engineering of solvation entropy by poly(4-styrenesulfonic acid) additive in an aqueous electrochemical system for enhanced low-grade heat harvesting |
| title_fullStr | Engineering of solvation entropy by poly(4-styrenesulfonic acid) additive in an aqueous electrochemical system for enhanced low-grade heat harvesting |
| title_full_unstemmed | Engineering of solvation entropy by poly(4-styrenesulfonic acid) additive in an aqueous electrochemical system for enhanced low-grade heat harvesting |
| title_short | Engineering of solvation entropy by poly(4-styrenesulfonic acid) additive in an aqueous electrochemical system for enhanced low-grade heat harvesting |
| title_sort | engineering of solvation entropy by poly 4 styrenesulfonic acid additive in an aqueous electrochemical system for enhanced low grade heat harvesting |
| topic | Engineering::Electrical and electronic engineering Low-Grade Heat Harveting Thermally Regenerative Electrochemical Cycle |
| url | https://hdl.handle.net/10356/171429 |
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