Multi-phase NaNbO (NN) exhibits high adjustability on the ordering of both polarization and oxygen octahedral tilt, becoming a perfect carrier to design heterogeneous structure for boosting comprehensive energy storage properties. To balance the energy storage density and efficiency, the coexistence of the relaxor antiferroelectric (AFE) with high polarization capability and the relaxor ferroelectrics (RFE) with high efficiency is designed in this work by introducing SrBi□TiTa□O (SBTT) into NaNbO-BiFeO. As a result, an outstanding capacitive energy density () of 12.25 J cm with a high of 83 % can be achieved in NN-BF-SBTT ceramic, which can be identified as a novel heterogeneous coexisting structure with the crossover of high polarization capability in relaxor AFE and high efficiency in RFE in terms of high-resolution TEM. Furthermore, grain refinement and the dense structure inhibit the leak current, suppress the concentration of oxygen vacancy defects and raise the activation energy (), thus enhancing the . These excellent energy storage properties overcome the trade-offs between the two sets of parameters (-, Δ-), offering a refreshing strategy for the development of high-performance ceramic capacitors.

中文翻译：

---

通过异质结构调整和缺陷工程增强无铅弛豫 AFE/FE 系统的综合储能性能


多相NaNbO（NN）在极化和氧八面体倾斜的有序性方面表现出高度可调节性，成为设计异质结构以提高综合储能性能的完美载体。为了平衡储能密度和效率，本工作通过将 SrBi□TiTa□O (SBTT) 引入到 NaNbO- 中，设计了具有高极化能力的弛豫反铁电体 (AFE) 和具有高效率的弛豫铁电体 (RFE) 的共存。铋铁氧体。结果，NN-BF-SBTT陶瓷可以实现高达83％的12.25 J cm的出色电容能量密度（），这可以被认为是一种新型异质共存结构，具有高极化能力的交叉。高分辨率 TEM 方面的弛豫 AFE 和 RFE 效率高。此外，晶粒细化和致密结构抑制了漏电流，抑制了氧空位缺陷的浓度并提高了活化能（），从而提高了。这些优异的储能特性克服了两组参数（-、Δ-）之间的权衡，为高性能陶瓷电容器的开发提供了令人耳目一新的策略。