Tailoring frequency-insensitive large field-induced strain and energy storage properties in (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3 -modified (Bi 0.5 Na 0.5 )TiO 3 lead-free ceramics

and η of 69%, while still remaining insensitive to changes in temperature, frequency, and cycle number. More importantly, a short discharge time (of ∼0.41 μs) was also measured for this composition. Introducing BCZT into the composition was found to promote a non-ergodic-to-ergodic relaxor (NR-ER) phase transition and the formation of dynamic polar nanoregions (PNRs), generating the high strain responses and superior energy storage performances of the given compositions. These features may offer a new strategy to simultaneously tailor lead-free relaxor ferroelectrics toward high field-induced strain and superior energy storage performance for ceramics actuators and capacitor applications.