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Giant electrocaloric materials energy efficiency in highly ordered lead scandium tantalate

Author

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  • Youri Nouchokgwe

    (Luxembourg Institute of Science and Technology
    University of Luxembourg)

  • Pierre Lheritier

    (Luxembourg Institute of Science and Technology)

  • Chang-Hyo Hong

    (Ulsan National Institute of Science and Technology)

  • Alvar Torelló

    (Luxembourg Institute of Science and Technology
    University of Luxembourg)

  • Romain Faye

    (Luxembourg Institute of Science and Technology)

  • Wook Jo

    (Ulsan National Institute of Science and Technology)

  • Christian R. H. Bahl

    (Technical University of Denmark)

  • Emmanuel Defay

    (Luxembourg Institute of Science and Technology)

Abstract

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.

Suggested Citation

  • Youri Nouchokgwe & Pierre Lheritier & Chang-Hyo Hong & Alvar Torelló & Romain Faye & Wook Jo & Christian R. H. Bahl & Emmanuel Defay, 2021. "Giant electrocaloric materials energy efficiency in highly ordered lead scandium tantalate," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23354-y
    DOI: 10.1038/s41467-021-23354-y
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