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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202004717
|2 doi
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|a pubmed24n1071.xml
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|a (DE-627)NLM321536711
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|a (NLM)33594714
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|a DE-627
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|a eng
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|a Gao, Caitian
|e verfasserin
|4 aut
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|a Efficient Low-Grade Heat Harvesting Enabled by Tuning the Hydration Entropy in an Electrochemical System
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 02.04.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 Wiley-VCH GmbH.
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|a Harvesting of low-grade heat (<100 °C) is promising, but its application is hampered by a lack of efficient and low-cost systems. The thermally regenerative electrochemical cycle (TREC) is a potential alternative system with high energy-conversion efficiency. Here, the temperature coefficient (α), which is a key factor in a TREC, is studied by tuning the hydration entropy of the electrochemical reaction. The change of α in copper hexacyanoferrate (CuHCFe) with intercalation of different monovalent cations (Na+ , K+ , Rb+ , and Cs+ ) and a larger α value of -1.004 mV K-1 being found in the Rb+ system are observed. With a view to practical application, a full cell is constructed for low-grade heat harvesting. The resultant ηe is 4.34% when TREC operates between 10 and 50 °C, which further reaches 6.21% when 50% heat recuperation is considered. This efficiency equals to 50% of the Carnot efficiency, which is thought to be the highest ηe reported for low-grade heat harvesting systems. This study provides a fundamental understanding of the mechanisms governing the TREC, and the demonstrated efficient system paves the way for low-grade heat harvesting
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|a Journal Article
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|a energy conversion efficiency
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|a hydration entropy
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|a low-grade heat harvesting
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|a monovalent cations
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|a thermally regenerative electrochemical cycle
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|a Liu, Yezhou
|e verfasserin
|4 aut
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|a Chen, Bingbing
|e verfasserin
|4 aut
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|a Yun, Jeonghun
|e verfasserin
|4 aut
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|a Feng, Erxi
|e verfasserin
|4 aut
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|a Kim, Yeongae
|e verfasserin
|4 aut
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|a Kim, Moobum
|e verfasserin
|4 aut
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|a Choi, Ahreum
|e verfasserin
|4 aut
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|a Lee, Hyun-Wook
|e verfasserin
|4 aut
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| 700 |
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|a Lee, Seok Woo
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 33(2021), 13 vom: 26. Apr., Seite e2004717
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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|g volume:33
|g year:2021
|g number:13
|g day:26
|g month:04
|g pages:e2004717
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|u http://dx.doi.org/10.1002/adma.202004717
|3 Volltext
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