Thermoresponsive ionic liquid for electrochemical low-grade heat harvesting
Thermally regenerative electrochemical cycle (TREC) is a promising technology for low-grade heat harvesting by employing the thermogalvanic effect of the electrodes. Whereas the electrolytes applied in TREC systems have a negligible response to temperature variation. In this study, a thermoresponsiv...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/170444 |
| _version_ | 1811693790927257600 |
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| author | Wu, Angyin Li, Xiaoya Lee, Donghoon Li, Jia Yun, Jeonghun Jiang, Cheng Li, Zongkang Lee, Seok Woo |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Wu, Angyin Li, Xiaoya Lee, Donghoon Li, Jia Yun, Jeonghun Jiang, Cheng Li, Zongkang Lee, Seok Woo |
| author_sort | Wu, Angyin |
| collection | NTU |
| description | Thermally regenerative electrochemical cycle (TREC) is a promising technology for low-grade heat harvesting by employing the thermogalvanic effect of the electrodes. Whereas the electrolytes applied in TREC systems have a negligible response to temperature variation. In this study, a thermoresponsive ionic liquid (TRIL) is added to an electrolyte to endow it with temperature-driven phase change behavior, and the electrolyte is then utilized in a copper hexacyanoferrate-based TREC system for ultralow-grade heat harvesting. The TREC system is operated between 10 and 30 °C across the phase change critical point (Tc), so that the solvation states of the ions varied during the charging and discharging process, and a high energy density of 1.30 J g−1 and high energy conversion efficiency of 1.32% (20.0% for the Carnot efficiency) are achieved. The energy efficiency is 10 times that achieved by the conventional non-TRIL system under the same conditions. Moreover, the Tc of the TRIL can be tuned according to the species and concentrations of the electrolyte salt, which enhances the feasibility and resilience of the TRIL-containing TREC system. This study provides a novel perspective for electrolyte design in electrochemical cells, promoting the applicability of electrochemical cells in high-performance ultralow-grade thermal energy harvesting systems. |
| first_indexed | 2024-10-01T06:57:17Z |
| format | Journal Article |
| id | ntu-10356/170444 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:57:17Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1704442023-09-12T05:38:30Z Thermoresponsive ionic liquid for electrochemical low-grade heat harvesting Wu, Angyin Li, Xiaoya Lee, Donghoon Li, Jia Yun, Jeonghun Jiang, Cheng Li, Zongkang Lee, Seok Woo School of Electrical and Electronic Engineering Rolls-Royce@NTU Corporate Lab Engineering::Electrical and electronic engineering Thermally Regenerative Electrochemical Cycle Critical Temperature Tuning Thermally regenerative electrochemical cycle (TREC) is a promising technology for low-grade heat harvesting by employing the thermogalvanic effect of the electrodes. Whereas the electrolytes applied in TREC systems have a negligible response to temperature variation. In this study, a thermoresponsive ionic liquid (TRIL) is added to an electrolyte to endow it with temperature-driven phase change behavior, and the electrolyte is then utilized in a copper hexacyanoferrate-based TREC system for ultralow-grade heat harvesting. The TREC system is operated between 10 and 30 °C across the phase change critical point (Tc), so that the solvation states of the ions varied during the charging and discharging process, and a high energy density of 1.30 J g−1 and high energy conversion efficiency of 1.32% (20.0% for the Carnot efficiency) are achieved. The energy efficiency is 10 times that achieved by the conventional non-TRIL system under the same conditions. Moreover, the Tc of the TRIL can be tuned according to the species and concentrations of the electrolyte salt, which enhances the feasibility and resilience of the TRIL-containing TREC system. This study provides a novel perspective for electrolyte design in electrochemical cells, promoting the applicability of electrochemical cells in high-performance ultralow-grade thermal energy harvesting systems. Ministry of Education (MOE) S.W.L. acknowledges the support by Ministry of Education, Singapore under Ref. no. MOE2019-T2-1-122. 2023-09-12T05:38:30Z 2023-09-12T05:38:30Z 2023 Journal Article Wu, A., Li, X., Lee, D., Li, J., Yun, J., Jiang, C., Li, Z. & Lee, S. W. (2023). Thermoresponsive ionic liquid for electrochemical low-grade heat harvesting. Nano Energy, 105, 108022-. https://dx.doi.org/10.1016/j.nanoen.2022.108022 2211-2855 https://hdl.handle.net/10356/170444 10.1016/j.nanoen.2022.108022 2-s2.0-85142312572 105 108022 en MOE2019-T2-1-122 Nano Energy © 2022 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Thermally Regenerative Electrochemical Cycle Critical Temperature Tuning Wu, Angyin Li, Xiaoya Lee, Donghoon Li, Jia Yun, Jeonghun Jiang, Cheng Li, Zongkang Lee, Seok Woo Thermoresponsive ionic liquid for electrochemical low-grade heat harvesting |
| title | Thermoresponsive ionic liquid for electrochemical low-grade heat harvesting |
| title_full | Thermoresponsive ionic liquid for electrochemical low-grade heat harvesting |
| title_fullStr | Thermoresponsive ionic liquid for electrochemical low-grade heat harvesting |
| title_full_unstemmed | Thermoresponsive ionic liquid for electrochemical low-grade heat harvesting |
| title_short | Thermoresponsive ionic liquid for electrochemical low-grade heat harvesting |
| title_sort | thermoresponsive ionic liquid for electrochemical low grade heat harvesting |
| topic | Engineering::Electrical and electronic engineering Thermally Regenerative Electrochemical Cycle Critical Temperature Tuning |
| url | https://hdl.handle.net/10356/170444 |
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