Ultrahigh capacitive energy storage of BiFeO3-based ceramics through multi-oriented nanodomain construction

Lead-free BiFeO3-based (BF) materials with colossal spontaneous polarization and high Curie temperatures exhibit considerable potential for groundbreaking developments in dielectric capacitors. However, their inherent limitations, such as restricted breakdown strength (Eb) and pronounced remanent polarization, critically restrict advancements in energy storage capabilities. Herein, we achieve an exceptional recoverable energy density of 12.2 J cm−3 with an impressive efficiency of 90.1% via the strategic design of a dipolar region with high resilience to electric fields within BiFeO3-based ceramics. Guided by phase-field simulations and validated through atomic-scale observations, the superior energy storage…