Constructing phase boundary in AgNbO₃ antiferroelectrics: pathway simultaneously achieving high energy density and efficiency.

ABSTRACT: Dielectric capacitors with high energy storage density (W_rec) and efficiency (η) are in great demand for high/pulsed power electronic systems, but the state-of-the-art lead-free dielectric materials are facing the challenge of increasing one parameter at the cost of the other. Herein, we report that high W_rec of 6.3 J cm^-3 with η of 90% can be simultaneously achieved by constructing a room temperature M2-M3 phase boundary in (1-x)AgNbO₃-xAgTaO₃ solid solution system. The designed material exhibits high energy storage stability over a wide temperature range of 20-150 °C and excellent cycling reliability up to 10⁶ cycles. All these merits achieved in the studied solid solution are attributed to the unique relaxor antiferroelec

SUBMITTER: Luo N 

PROVIDER: S-EPMC7515927 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature