Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Kyunggu | - |
dc.contributor.author | Kang, Junsik | - |
dc.contributor.author | Lee, Hochun | - |
dc.date.accessioned | 2021-10-17T13:00:12Z | - |
dc.date.available | 2021-10-17T13:00:12Z | - |
dc.date.created | 2021-10-14 | - |
dc.date.issued | 2021-12 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/15569 | - |
dc.description.abstract | Thermoelectrochemical cells (TECs) are promising platforms for thermal energy conversion. However, their widespread use is limited because of their low Seebeck coefficient and low conversion efficiency. We demonstrate a hybrid thermoelectrochemical and concentration cell based on carbonate solvents with a I3−/I− redox couple (referred to as i-TCC), which outperforms the current best n-type TEC employing an aqueous Fe3+/2+ redox couple. As the temperature of the hot side of i-TCC increases above 40 °C, dimethyl carbonate solvent reacts with iodide anions to form a porous Li2CO3-matrix near the hot electrode, which sustains long-lasting iodide-concentration gradient across the cell. The thermally driven concentration difference boosts the performance of the TEC to yield a remarkably high Seebeck coefficient (+7.7 mV K−1), figure of merit (ZT = 0.114), and Carnot efficiency (5.2%) for a temperature difference of 35 °C (25 °C and 60 °C for cold and hot temperatures, respectively). i-TCC demonstrated here thus provides a new perspective in harvesting low-grade waste heat. © 2021 Elsevier B.V. | - |
dc.language | English | - |
dc.publisher | Elsevier B.V. | - |
dc.title | Hybrid thermoelectrochemical and concentration cells for harvesting low-grade waste heat | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.cej.2021.131797 | - |
dc.identifier.wosid | 000724596700002 | - |
dc.identifier.scopusid | 2-s2.0-85113679430 | - |
dc.identifier.bibliographicCitation | Chemical Engineering Journal, v.426 | - |
dc.description.isOpenAccess | FALSE | - |
dc.subject.keywordAuthor | Electrochemistry | - |
dc.subject.keywordAuthor | Energy conversion | - |
dc.subject.keywordAuthor | Energy harvesting | - |
dc.subject.keywordAuthor | Nucleophilic substitution | - |
dc.subject.keywordAuthor | Thermoelectrochemical cell | - |
dc.subject.keywordPlus | Electrochemistry | - |
dc.subject.keywordPlus | Lithium compounds | - |
dc.subject.keywordPlus | Seebeck coefficient | - |
dc.subject.keywordPlus | Waste heat | - |
dc.subject.keywordPlus | Carbonate solvents | - |
dc.subject.keywordPlus | Cell/B.E | - |
dc.subject.keywordPlus | Concentration cells | - |
dc.subject.keywordPlus | Energy | - |
dc.subject.keywordPlus | Low-grade waste heat | - |
dc.subject.keywordPlus | Nucleophilic substitutions | - |
dc.subject.keywordPlus | Redox couple | - |
dc.subject.keywordPlus | Seebeck | - |
dc.subject.keywordPlus | Thermo-electrochemical cells | - |
dc.subject.keywordPlus | Energy harvesting | - |
dc.citation.title | Chemical Engineering Journal | - |
dc.citation.volume | 426 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental; Engineering, Chemical | - |
dc.type.docType | Article | - |
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