Synergic Enhancement of Energy Storage Density and Efficiency in MnO-Doped AgNbO@SiO Ceramics via A/B-Site Substitutions.

ACS Appl Mater Interfaces

State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

Published: February 2022

Dielectric energy storage devices with high power density show great potential in applications of smart grids, electrical vehicles, pulsed power weapons, and so on. However, their limited recoverable energy density badly restricts their utilization and harms the miniaturization, portability, and integration of electronics. Herein, equivalent amounts of BiO and ScO were introduced to improve the energy storage property of 0.10 wt % MnO-doped AgNbO@SiO ceramics by simultaneously enhancing the maximum polarization, breakdown strength, and relaxation feature. It is particularly interesting that the AgNbO-based ceramics with 4 mol % BiO and ScO demonstrate the recoverable energy storage density of 5.9 J/cm with the energy storage efficiency of 71%, exhibiting 1.9 and 1.4 times enhancement compared to 0.10 wt % MnO-doped AgNbO@SiO ceramics. In addition, the benign energy storage performance can be maintained at elevated temperatures and frequencies and up to 10 cycling, indicating great potential in advanced high-power applications.

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http://dx.doi.org/10.1021/acsami.1c25234DOI Listing

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