Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/140294
Title: Engineering the electrochemical temperature coefficient for efficient low-grade heat harvesting
Authors: Gao, Caitian
Yin, Yuling
Zheng, Lu
Liu, Yezhou
Sim, Soojin
He, Yongmin
Zhu, Chao
Liu, Zheng
Lee, Hyun-Wook
Yuan, Qinghong
Lee, Seok Woo
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Gao, C., Yin, Y., Zheng, L., Liu, Y., Sim, S., He, Y., . . . Lee, S. W. (2018). Engineering the electrochemical temperature coefficient for efficient low-grade heat harvesting. Advanced Functional Materials, 28(35), 1803129-. doi:10.1002/adfm.201803129
Journal: Advanced Functional Materials
Abstract: Low-grade heat to electricity conversion has shown a large potential for sustainable energy supply. Recently, the low-grade heat harvesting in the thermally regenerative electrochemical cycle (TREC) is a promising candidate with high energy conversion efficiency. In this system, the electrochemical temperature coefficient (α) plays a dominant role in efficient heat harvesting. However, the internal factors that affect α are still not clear and significant improvements are needed. Here, α of various Prussian Blue analogues (PBAs) is investigated and their lattice change during cation intercalation is monitored using the ex situ X-ray diffraction (XRD) method. For the first time, it is found that α is highly related to the lattice parameter change. Large lattice shrinkage exhibits a large negative α, while lattice expansion is corresponding to a positive α. These are mainly attributed to the different phonon vibration entropy changes upon cation intercalation in various PBAs. Especially, purple cobalt hexacynoferrate delivers the largest α of −0.89 mV K−1 and enables highly efficient heat conversion efficiency up to 2.65% (21% of relative efficiency). The results of this study provide a fundamental understanding of temperature coefficient in electrochemical reactions and pave the way for designing high-performance material for low-grade heat harvesting.
URI: https://hdl.handle.net/10356/140294
ISSN: 1616-301X
DOI: 10.1002/adfm.201803129
Rights: © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

SCOPUSTM   
Citations 10

42
Updated on Feb 2, 2023

Web of ScienceTM
Citations 10

40
Updated on Jan 25, 2023

Page view(s)

213
Updated on Jan 31, 2023

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.