High energy storage density and efficiency in AgNbO3 based relaxor antiferroelectrics with reduced silver content. Issue 8 (July 2023)

• Record Type: Journal Article
• Authors: Ma, Li; Che, Zhiyi; Xu, Chao; Cen, Zhenyong; Feng, Qin; Chen, Xiyong; Toyohisa, Fujita; Li, Jing-Feng; Zhang, Shujun; Luo, Nengneng
• Is Part Of: Journal of the European Ceramic Society. Volume 43:Issue 8(2023)
• Page Start: 3228
• Page End: 3235
• Publication Date: 2023-07
• Subjects: Silver niobate -- M2-M3 phase boundary -- Antiferroelectrics -- Energy storage performance -- Relaxor behavior; 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.2023.01.049
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Silver niobate based lead-free antiferroelectric ceramics have demonstrated great advantages, but the high consumption of noble metal silver may restrict their commercial application. In this work, Na + and Ta 5+ co-modified (Ag1- x Na x )(Nb1- y Ta y )O3 (100 x Na-100 y Ta) ceramics were investigated, aiming to reduce the silver consumption and achieve good energy storage properties. The Na + tended to increase M2-M3 phase transition temperature ( T M2-M3 ), while Ta 5+ was more likely to reduce T M2-M3 . A new current peak ( E R ) was observed for the first time in all current-electric field curves. As expected, a room temperature M2-M3 phase boundary with relaxor AFE property was realized in 40Na-65Ta with obviously reduced silver content, in which high recoverable energy storage density ( W rec ) of 6.5 J/cm 3 and good energy storage efficiency ( η ) of 78% were achieved. This work demonstrates a strategy to realize relaxor antiferroelectrics in AgNbO3 based ceramics for energy storage performance, and promotes the commercialization potential. Highlights: M2-M3 phase boundary with relaxor AFE feature is constructed. Current peak E R for relaxation is observed in current-electric field curves. High W rec of 6.5 J/cm 3 and η of 78% are achieved in 40Na-65Ta with reduced Ag content. Promoting commercialization potential of AgNbO3 -based ceramics.