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arXiv · 2209.14452

Enhanced electrocaloric and energy-storage properties of environment-friendly ferroelectric Ba0.9Sr0.1Ti1-xSnxO3 ceramics

Hajar Zaitouni·Lahoucine Hajji·Daoud Mezzane·El Hassan Choukri·Anna Razumnaya·Yaovi Gagou·Khalid Hoummada·Abdelhadi Alimoussa·Brigita Rozic·Dejvid Cresnar·Mimoun El Marssi·Zdravko Kutnjak
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Abstract

The electrocaloric (EC) effect and energy storage properties of eco-friendly ferroelectric Ba0.9Sr0.1Ti1-xSnxO3 (BSTS-x) ceramics prepared by the conventional solid-state reaction method were studied. Significant energy efficiency exceeding 80% was found in our samples. In particular, BSTS-5 and BSTS-10 samples exhibit 92% and 88% efficiency, respectively, over a wide temperature range around room temperature (RT). Direct EC measurement and an indirect method based on the thermodynamic approach were used to characterize the EC effect, and both yielded consistent results. The largest electrocaloric responsivity of 0.73 K mm/kV was obtained for BSTS-0 at 368 K with an adiabatic temperature change DT(EC) of 0.55 K at a low applied electric field of only 7.4 kV/cm. With increasing Sn-content, the EC response of BSTS-x ceramics decreases, while their diffuseness increases over an extensive temperature range, centered at RT. A significant coefficient of performance (COP > 26) was found for our samples. The obtained results demonstrate the possibility of designing eco-friendly materials with higher EC effect and energy efficiency for potential solid-state refrigeration and energy storage devices.

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Hajar Zaitouni, Lahoucine Hajji, Daoud Mezzane, El Hassan Choukri, Anna Razumnaya, Yaovi Gagou, Khalid Hoummada, Abdelhadi Alimoussa, Brigita Rozic, Dejvid Cresnar, Mimoun El Marssi, Zdravko Kutnjak. 2022-09-28. Enhanced electrocaloric and energy-storage properties of environment-friendly ferroelectric Ba0.9Sr0.1Ti1-xSnxO3 ceramics. https://doi.org/10.1016/j.mtcomm.2022.103351

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