Abstract
Energy storage materials have received increasing attention for sustainable energy production and use. Despite the excellent properties of ferroelectric/antiferroelectric ceramics, PVDF-based co/terpolymer films, and related composites, few materials meet the high-performance energy storage requirements. Here, we design antiferroelectric composites by combining anti-ferroelectric fillers with a high dielectric permittivity and ferroelectric copolymers with high breakdown fields. As a result, a high discharge energy density of 2.9 J/cm3 under much lower fields, i.e., 175 MV/m is realized. Such high-performance antiferroelectric composites could aid in the further development of promising new energy storage materials.
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