Abstract
Lead-free BiMnO3 modified BaTiO3 solid solution films are prepared by Sol-gel methods. An ultrahigh energy storage density of 94.1 J/cm3 and an efficiency of 84.51% are obtained, together with excellent frequency and thermal stability, in 0.92BaTiO3-0.08BiMnO3 solid solution films. The Jujube-Cake structure of the segregation particles in the films is suggested to improve the electric insulation, breakdown strength, and the maximum polarization, which are the key factors for energy storage performances in relaxor ferroelectrics. This work opens a route to improve the energy storage performances in solid solution films.
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