Enhanced electrocaloric effect and energy-storage performance in PBLZT films with various Ba2+ content. Issue 15 (15th November 2016)

• Record Type: Journal Article
• Authors: Gao, Hongcheng; Sun, Ningning; Li, Yong; Zhang, Qiwei; Hao, Xihong; Kong, Ling Bing; Wang, Qing
• Is Part Of: Ceramics international. Volume 42:Issue 15(2016)
• Page Start: 16439
• Page End: 16447
• Publication Date: 2016-11-15
• Subjects: Antiferroelectric -- Thick films -- Electrocaloric effect -- Energy-storage; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.08.054
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: (100)-oriented Pb(0.90− x ) Ba x La0.10 Zr0.90 Ti0.10 O3 ( x =0, 0.02, 0.05 and 0.11) antiferroelectric thick films were deposited on LaNiO3 /Si (100) substrates by the sol-gel process. The influences of Ba 2+ content on the dielectric properties, electrocaloric effect (ECE), energy-storage performance and leakage current were systematically investigated. With Ba 2+ content increasing, the temperature ( T m ) corresponding to the maximum dielectric constant of the thick films was decreased, while their diffuseness was increased. The maximum ECE ∆ T =18.1 °C was obtained in the thick film with x =0.05 at room temperature under ∆ E =700 kV/cm. The maximum energy storage density of 42.3 J/cm 3 and the corresponding efficiency of 68% was achieved in the film with x =0.11, companied by a power density of 0.53 MW/cm 3, due to its high breakdown strength. In addition, a small leakage current density (<10 −5 A/cm 2 ) were attained in these films at room temperature. In conclusion, we believe that this kind of antiferroelctric thick film is a potential candidate for applications in solid cooling devices and the energy-storage systems.