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 networks. The simultaneous enhancement of the reversible polarization and breakdown strength leads to a U e of 202 joules per cubic centimeter with a high efficiency of ~79%. The proposed strategy provides a design freedom for next-generation high-performance dielectrics.

中文翻译：

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弛豫器中的极地雪泥分区策略可带来巨大的能量存储能力


弛豫铁电（RFE）薄膜是用于小型化高功率电子系统的有前途的储能候选者，这归功于其高能量密度（ U e ）和效率。然而，推进他们的U e超过每立方厘米 200 焦耳是一个挑战，限制了它们作为下一代储能设备的潜力。我们在 RFE 中实施了分区极地雪泥策略，以突破U e 。在相场模拟的指导下，我们设计并制造了高性能 Bi(Mg 0.5钛0.5 )O 3 -钛酸锶3基于RFE薄膜，具有孤立的雪泥状极性簇，这是通过抑制非极性立方基体和引入高度绝缘网络实现的。可逆极化和击穿强度的同时增强导致U e 202 焦耳/立方厘米，效率高达约 79%。所提出的策略为下一代高性能电介质提供了设计自由度。