Cited 1 time in webofscience Cited 2 time in scopus

Diglyme-Based Thermoelectrochemical Cells Operable at Both Subzero and Elevated Temperatures

Title
Diglyme-Based Thermoelectrochemical Cells Operable at Both Subzero and Elevated Temperatures
Authors
Kim, KyungguLee, Hochun
DGIST Authors
Kim, Kyunggu; Lee, Hochun
Issue Date
2019-11
Citation
Energy Technology, 7(11), 1900857
Type
Article
Article Type
Article in press
Author Keywords
harvesting low-grade heatLi+/Li redox reactionsthermoelectrochemical cellswide-temperature-range operation
Keywords
THERMAL-CONDUCTIVITYAPROTIC-SOLVENTSPOWER-GENERATIONCARBON-NANOTUBELITHIUMHEATGLYMESPERFORMANCECONVERSIONENTROPY
ISSN
2194-4288
Abstract
Thermoelectrochemical cells (TECs) are promising devices for harvesting low-grade waste heat (<200 °C). Most TEC researches have thus far focused on aqueous redox couples, but aqueous solutions suffer from a limited operating temperature range (0–100 °C). Herein, TECs based on nonaqueous Li+/Li redox couples (Li-TECs) using diglyme (2G) electrolytes featuring a wide liquidus range (from −64 to 162 °C) are introduced. Notably, a Li-TEC with 1.8 m lithium bis(fluorosulfonyl)imide (LiFSI) 2G surpasses the current best nonaqueous TECs based on ionic liquid (IL) electrolytes at elevated temperatures: 30% higher output power for cold side temperature (Tcold) and hot side temperature (Thot) of 60 and 130 °C, respectively. In addition, unlike the TECs using ILs, the Li-TEC displays stable operation even at Tcold of −25 °C, which, for Thot of 150 °C, yields an unprecedented high output voltage of 270 mV from a single Li-TEC. Herein, the wide-temperature-range operation demonstrated takes the TECs one step closer to practical applications. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
http://hdl.handle.net/20.500.11750/10802
DOI
10.1002/ente.201900857
Publisher
Wiley-VCH Verlag
Related Researcher
  • Author Lee, Hochun Electrochemistry Laboratory for Sustainable Energy(ELSE)
  • Research Interests Lithium-ion batteries; Novel Materials for rechargeable batteries; Novel energy conversion;storage systems; Electrochemistry; 리튬이차전지; 이차전지용 신규 전극 및 전해액; 신규 에너지변환 및 저장 시스템; 전기화학
Files:
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Collection:
Department of Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles


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