High energy storage efficiency and large electrocaloric effect in lead-free BaTi0.89Sn0.11O3 ceramic. Issue 15 (15th October 2020)

• Record Type: Journal Article
• Authors: Merselmiz, Soukaina; Hanani, Zouhair; Mezzane, Daoud; Spreitzer, Matjaž; Bradeško, Andraž; Fabijan, David; Vengust, Damjan; Amjoud, M'Barek; Hajji, Lahoucine; Abkhar, Zahra; Razumnaya, Anna G.; Rožič, Brigita; Luk'yanchuk, Igor A.; Kutnjak, Zdravko
• Is Part Of: Ceramics international. Volume 46:Issue 15(2020)
• Page Start: 23867
• Page End: 23876
• Publication Date: 2020-10-15
• Subjects: Lead-free ceramic -- Energy storage -- High-efficiency -- Piezoelectric -- Electrocaloric effect; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.06.163
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Lead-free BaTi0.89 Sn0.11 O3 (BTSn) ceramic was elaborated via a solid-state reaction method and its dielectric, ferroelectric, energy storage, electromechanical as well as electrocaloric properties were investigated at 25 kV/cm. Pure perovskite structure was confirmed by X-ray diffraction analysis. The maximum of the dielectric constant was found to be 17390 at 41 °C. The enhanced total energy density, the recovered energy density, and the energy storage efficiency of 92.7 mJ/cm 3, 84.4 mJ/cm 3, and 91.04 %, respectively, were observed at 60 °C. In contrast, the highest energy storage efficiency of 95.87 % was obtained at 100 °C. At room temperature, the electromechanical strain and the large-signal piezoelectric coefficient reached a maximum of 0.07 % and 280 pm/V. The large electrocaloric effect of 0.71 K and the electrocaloric responsivity of 0.28 × 10 -6 K mm/kV at 49 °C under 25 kV/cm were indirectly determined via Maxwell approach and the measured ferroelectric polarization P ( E, T ). The electrocaloric response was also modelled by exploiting the Landau-Ginzburg-Devonshire (LGD) phenomenological theory. The modelling result of 0.61 K at 50 °C under 25 kV/cm supports the experimental findings. We conclude that BTSn lead-free ceramic is a promising candidate for potential applications in high-efficiency energy storage devices and solid-state refrigeration technology.