论文部分内容阅读
We report a distinctive way for designing lead-free films with high energy storage performance.By insert?ing different single perovskite cells into Bi4TiaO12,P-E hysteresis loops present larger maximum polarization,higher breakdown strength and smaller slim-shaped area.We prepared 0.15Bi7Fe3Ti3O21-0.5Bi4Sr3Ti6O21-0.35Bi4Ba3Ti6O21 solid solution ferroelectric films employing the sol-gel method,and obtained high energy storage density of 132.5 J/cm3 and efficiency of 78.6％ while maintaining large maximum polarization of 112.3 μC/cm2 and a high breakdown electric field of 3700kV/cm.Moreover,the energy storage density and efficiency exhibit stability over the temperature range from 20 ℃ to 125 ℃,and anti-fatigue stability maintains up to 108 cycles.The films with a simple preparation method and high energy storage performance are likely to become candidates for high-performance energy storage materials.