Qian, X., Han, D., Zheng, L., Chen, J., Tyagi, M., Li, Q., Du, F., Zheng, S., Huang, X., Zhang, S., Shi, J., Huang, H., Shi, X., Chen, J., Qin, H., Bernholc, J., Chen, X., Chen, L. Q., Hong, L., & Zhang, Q. M. (2021). High-entropy polymer produces a giant electrocaloric effect at low fields. Nature, 600(7890), 664-669. https://doi.org/10.1038/s41586-021-04189-5
Qian, Xiaoshi ; Han, Donglin ; Zheng, Lirong et al. / High-entropy polymer produces a giant electrocaloric effect at low fields. In: Nature. 2021 ; Vol. 600, No. 7890. pp. 664-669.
@article{5997708389f24a358bb28d3db9edbfdf,
title = "High-entropy polymer produces a giant electrocaloric effect at low fields",
abstract = "More than a decade of research on the electrocaloric (EC) effect has resulted in EC materials and EC multilayer chips that satisfy a minimum EC temperature change of 5 K required for caloric heat pumps1–3. However, these EC temperature changes are generated through the application of high electric fields4–8 (close to their dielectric breakdown strengths), which result in rapid degradation and fatigue of EC performance. Here we report a class of EC polymer that exhibits an EC entropy change of 37.5 J kg−1 K−1 and a temperature change of 7.5 K under 50 MV m−1, a 275% enhancement over the state-of-the-art EC polymers under the same field strength. We show that converting a small number of the chlorofluoroethylene groups in poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer into covalent double bonds markedly increases the number of the polar entities and enhances the polar–nonpolar interfacial areas of the polymer. The polar phases in the polymer adopt a loosely correlated, high-entropy state with a low energy barrier for electric-field-induced switching. The polymer maintains performance for more than one million cycles at the low fields necessary for practical EC cooling applications, suggesting that this strategy may yield materials suitable for use in caloric heat pumps.",
author = "Xiaoshi Qian and Donglin Han and Lirong Zheng and Jie Chen and Madhusudan Tyagi and Qiang Li and Feihong Du and Shanyu Zheng and Xingyi Huang and Shihai Zhang and Junye Shi and Houbing Huang and Xiaoming Shi and Jiangping Chen and Hancheng Qin and Jerzy Bernholc and Xin Chen and Chen, {Long Qing} and Liang Hong and Zhang, {Q. M.}",
note = "Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer Nature Limited.",
year = "2021",
month = dec,
day = "23",
doi = "10.1038/s41586-021-04189-5",
language = "English",
volume = "600",
pages = "664--669",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Research",
number = "7890",
}
Qian, X, Han, D, Zheng, L, Chen, J, Tyagi, M, Li, Q, Du, F, Zheng, S, Huang, X, Zhang, S, Shi, J, Huang, H, Shi, X, Chen, J, Qin, H, Bernholc, J, Chen, X, Chen, LQ, Hong, L & Zhang, QM 2021, 'High-entropy polymer produces a giant electrocaloric effect at low fields', Nature, vol. 600, no. 7890, pp. 664-669. https://doi.org/10.1038/s41586-021-04189-5
High-entropy polymer produces a giant electrocaloric effect at low fields. / Qian, Xiaoshi; Han, Donglin; Zheng, Lirong et al.
In:
Nature, Vol. 600, No. 7890, 23.12.2021, p. 664-669.
Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - High-entropy polymer produces a giant electrocaloric effect at low fields
AU - Qian, Xiaoshi
AU - Han, Donglin
AU - Zheng, Lirong
AU - Chen, Jie
AU - Tyagi, Madhusudan
AU - Li, Qiang
AU - Du, Feihong
AU - Zheng, Shanyu
AU - Huang, Xingyi
AU - Zhang, Shihai
AU - Shi, Junye
AU - Huang, Houbing
AU - Shi, Xiaoming
AU - Chen, Jiangping
AU - Qin, Hancheng
AU - Bernholc, Jerzy
AU - Chen, Xin
AU - Chen, Long Qing
AU - Hong, Liang
AU - Zhang, Q. M.
N1 - Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Nature Limited.
PY - 2021/12/23
Y1 - 2021/12/23
N2 - More than a decade of research on the electrocaloric (EC) effect has resulted in EC materials and EC multilayer chips that satisfy a minimum EC temperature change of 5 K required for caloric heat pumps1–3. However, these EC temperature changes are generated through the application of high electric fields4–8 (close to their dielectric breakdown strengths), which result in rapid degradation and fatigue of EC performance. Here we report a class of EC polymer that exhibits an EC entropy change of 37.5 J kg−1 K−1 and a temperature change of 7.5 K under 50 MV m−1, a 275% enhancement over the state-of-the-art EC polymers under the same field strength. We show that converting a small number of the chlorofluoroethylene groups in poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer into covalent double bonds markedly increases the number of the polar entities and enhances the polar–nonpolar interfacial areas of the polymer. The polar phases in the polymer adopt a loosely correlated, high-entropy state with a low energy barrier for electric-field-induced switching. The polymer maintains performance for more than one million cycles at the low fields necessary for practical EC cooling applications, suggesting that this strategy may yield materials suitable for use in caloric heat pumps.
AB - More than a decade of research on the electrocaloric (EC) effect has resulted in EC materials and EC multilayer chips that satisfy a minimum EC temperature change of 5 K required for caloric heat pumps1–3. However, these EC temperature changes are generated through the application of high electric fields4–8 (close to their dielectric breakdown strengths), which result in rapid degradation and fatigue of EC performance. Here we report a class of EC polymer that exhibits an EC entropy change of 37.5 J kg−1 K−1 and a temperature change of 7.5 K under 50 MV m−1, a 275% enhancement over the state-of-the-art EC polymers under the same field strength. We show that converting a small number of the chlorofluoroethylene groups in poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer into covalent double bonds markedly increases the number of the polar entities and enhances the polar–nonpolar interfacial areas of the polymer. The polar phases in the polymer adopt a loosely correlated, high-entropy state with a low energy barrier for electric-field-induced switching. The polymer maintains performance for more than one million cycles at the low fields necessary for practical EC cooling applications, suggesting that this strategy may yield materials suitable for use in caloric heat pumps.
UR - http://www.scopus.com/inward/record.url?scp=85121521609&partnerID=8YFLogxK
U2 - 10.1038/s41586-021-04189-5
DO - 10.1038/s41586-021-04189-5
M3 - Article
C2 - 34937898
AN - SCOPUS:85121521609
SN - 0028-0836
VL - 600
SP - 664
EP - 669
JO - Nature
JF - Nature
IS - 7890
ER -
Qian X, Han D, Zheng L, Chen J, Tyagi M, Li Q et al. High-entropy polymer produces a giant electrocaloric effect at low fields. Nature. 2021 Dec 23;600(7890):664-669. doi: 10.1038/s41586-021-04189-5
