Realizing Remarkable Energy Storage at the Low Earth Orbit Temperature Range in Ternary (2-x)SrTiO3·x(Bi0.5Na0.5)TiO3·Bi4Ti3O12 Solid Solutions.

The high-performance energy storage ferroelectrics have drawn enormous attention, but one of the challenges for cutting-edge applications is a limited operating temperature range. Guided by grain boundary structures, composition, and phase field simulation, the remarkable energy-storage solid solutions were designed using ternary solid solutions 1.6SrTiO3·0.4(Bi0.5Na0.5)TiO3·Bi4Ti3O12, where giant recoverable energy density Ure ∼ 85.0 J/cm3, ultrahigh efficiency ƞ ∼ 69.0% and the state-of-the-art frequency stability were realized at Low Earth Orbit temperature range (-180°C-200°C). The emergent dipolar glass states induced by A-site cationic disorder and size mismatch are the origin of thermal stability and performance retention of 94% at extreme temperatures, which is confirmed by the First Order Reversal Curves method, Arrott plot, and phase field simulation. This work highlights a route to achieve extreme-temperature energy storage films.