Structure and energy storage performance of lanthanide elements doped AgNbO3 lead-free antiferroelectric ceramics. Issue 5 (May 2022)

• Record Type: Journal Article
• Authors: Ma, Li; Chen, Zhenpei; Che, Zhiyi; Feng, Qin; Cen, Zhenyong; Toyohisa, Fujita; Wei, Yuezhou; Hu, Changzheng; Liu, Laijun; Luo, Nengneng
• Is Part Of: Journal of the European Ceramic Society. Volume 42:Issue 5(2022)
• Page Start: 2204
• Page End: 2211
• Publication Date: 2022-05
• Subjects: Lanthanide elements -- Silver niobate -- Antiferroelectrics -- Energy storage performance; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2021.12.074
• Languages: English
• ISSNs: 0955-2219

Abstract

Highlights: Evidently enhanced AFE stability is achieved in all lanthanide ions doped ReAN samples compared to pristine AgNbO3 . Lanthanide ions can enter either A- or B-site, leading to a complex change of AFE stability and tolerance factor. Wrec and η are achieved to be respective around 4.5 J/cm 3 and 65 % for compositions from SmAN to TbAN under 250 kV/cm. This study provides a comprehensive knowledge of lanthanide element dopants in AgNbO3 system. Abstract: The aliovalent A-site modification in Silver niobate (AgNbO3, AN) antiferroelectrics has exhibited its advances in improving energy storage performance, but lack of a comprehensive understanding. In this work, 3 mol% lanthanide elements (Re: Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm) modified AgNbO3 (ReAN) ceramics were investigated. Compared with pristine AN, the ReAN ceramics exhibited decreased M1-M2 phase transition temperature and typical double-like P - E loops. The antiferroelectricity improved firstly from SmAN to TbAN because of reduction of tolerance factor, then it decayed with increasing atomic number due to partial Re 3+ ions entering into B-site. Consequently, high recoverable energy density ( W rec ≈ 4.5 J/cm 3 ) and efficiency ( η ≈ 65 %) were achieved for the compositions from SmAN to TbAN under 250 kV/cm. While a general decrease in W rec and η was observed by further increasing atomic number. This study provides a comprehensive knowledge of lanthanide element dopants in AgNbO3 system.