High energy storage density and efficiency in AgNbO3 based relaxor antiferroelectrics with reduced silver content

Publication Name

Journal of the European Ceramic Society


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 Ta5+ co-modified (Ag1-xNax)(Nb1-yTay)O3 (100xNa-100yTa) 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 (TM2-M3), while Ta5+ was more likely to reduce TM2-M3. A new current peak (ER) 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 (Wrec) of 6.5 J/cm3 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.

Open Access Status

This publication is not available as open access

Funding Number


Funding Sponsor

National Natural Science Foundation of China