Energy storage performance and dielectric tunability of AgNbO3 ferroelectric films

AgNbO3 ceramics have attracted significant attention as environmentally friendly energy storage materials; however, their low energy densities limit further development. In this study, a 400-nm AgNbO3 films with a dense microstructure and flat surface is prepared by pulsed laser deposition. The dielectric tenability and hysteresis loops of the film reveal its ferroelectric nature. The dielectric tunability of the AgNbO3 film was 63.6% at 600 kV/cm. The breakdown strength reached 1500 kV/cm, resulting in a high recoverable energy density of 13.3 J/cm(3). The recoverable energy storage density of AgNbO3 films indicates good temperature stability with a variation of < 10% between 30 degrees C and 150 degrees C and good frequency stability with a variation of < 10% between 10(3) Hz and 10(5) Hz. These results suggest that AgNbO(3 )dielectric films are promising energy storage materials.