Partitioning polar-slush strategy in relaxors leads to large energy-storage capability

Relaxor ferroelectric (RFE) films are promising energy-storage candidates for miniaturizing high-power electronic systems, which is credited to their high energy density ( U e ) and efficiency. However, advancing their U e beyond 200 joules per cubic centimeter is challenging, limiting their potential for next-generation energy-storage devices. We implemented a partitioning polar-slush strategy in RFEs to push the boundary of U e . Guided by phase-field simulations, we designed and fabricated high-performance Bi(Mg 0.5 Ti 0.5 )O 3 -SrTiO 3 –based RFE films with isolated slush-like polar clusters, which were realized through suppression of the nonpolar cubic matrix and introduction of highly insulating…