Giant electrocaloric materials energy efficiency in highly ordered lead scandium tantalate
| Autor: | Pierre Lheritier, Emmanuel Defay, Youri Nouchokgwe, Alvar Torello, Christian R.H. Bahl, Romain Faye, Wook Jo, Chang-Hyo Hong |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Ferroelectrics and multiferroics
Materials science Energy storage Science General Physics and Astronomy 02 engineering and technology 01 natural sciences General Biochemistry Genetics and Molecular Biology Article chemistry.chemical_compound Electric field 0103 physical sciences Lead scandium tantalate Figure of merit SDG 7 - Affordable and Clean Energy 010306 general physics Adiabatic process Multidisciplinary General Chemistry 021001 nanoscience & nanotechnology Engineering physics chemistry Vapor-compression refrigeration 0210 nano-technology Efficient energy use |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021) Nature Communications Nouchokgwe, Y, Lheritier, P, Hong, C H, Torelló, A, Faye, R, Jo, W, Bahl, C & Defay, E 2021, ' Giant electrocaloric materials energy efficiency in highly ordered lead scandium tantalate ', Nature Communications, vol. 12, no. 1, 3298 . https://doi.org/10.1038/s41467-021-23354-y |
| ISSN: | 2041-1723 |
| Popis: | Electrocaloric materials are promising working bodies for caloric-based technologies, suggested as an efficient alternative to the vapor compression systems. However, their materials efficiency defined as the ratio of the exchangeable electrocaloric heat to the work needed to trigger this heat remains unknown. Here, we show by direct measurements of heat and electrical work that a highly ordered bulk lead scandium tantalate can exchange more than a hundred times more electrocaloric heat than the work needed to trigger it. Besides, our material exhibits a maximum adiabatic temperature change of 3.7 K at an electric field of 40 kV cm−1. These features are strong assets in favor of electrocaloric materials for future cooling devices. The intrinsic efficiency of electrocaloric materials has been largely overlooked. Here, the authors use the parameter materials efficiency as the figure of merit to rank caloric materials, reporting on the materials efficiency of highly ordered bulk lead scandium tantalate PST. |
| Databáze: | OpenAIRE |
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