Chen Liang, Hu Tengfei, Shi Xiaoming, Yu Huifen, Zhang Hao, Wu Jie, Fu Zhengqian, Qi He, Chen Jun
Beijing Advanced Innovation Center for Materials Genome Engineering, Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, China.
State Key Laboratory of High Performance Ceramics and Superfine Microstructures and Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China.
Adv Mater. 2024 May;36(21):e2313285. doi: 10.1002/adma.202313285. Epub 2024 Feb 19.
Taking into account the need for energy conservation, achieving near-zero energy loss, namely ultrahigh efficiency (η), in energy storage capacitors with large recoverable energy storage density (W) plays an important role in applications, which is one of the major challenges in dielectric energy storage field. Here, guided by phase-field simulation, inhomogeneous polarization configuration with multiple symmetries and polarization magnitudes is controlled through aliovalent strongly polar double ion design to establish a strongly disordered state. A record-high η of ≈97.4% is realized in lead-free relaxors with a large W of ≈8.6 J cm, which also give a giant W of ≈11.6 J cm with an ultrahigh η of ≈96.1% through high-energy ball milling, showing a breakthrough progress in ceramic capacitors with a maximum figure of merit of 330. This work demonstrates that controlling inhomogeneous polarization configuration is an effective avenue to develop new high-performance near-zero energy loss energy storage capacitors.
考虑到节能的需求，在具有大的可恢复储能密度（W）的储能电容器中实现近零能量损失，即超高效率（η），在应用中起着重要作用，这是介电储能领域的主要挑战之一。在此，在相场模拟的指导下，通过异价强极性双离子设计控制具有多种对称性和极化强度的非均匀极化构型，以建立强无序状态。在具有约8.6 J/cm³大W值的无铅弛豫铁电体中实现了创纪录的约97.4%的η，通过高能球磨，其还给出了约11.6 J/cm³的巨大W值和约96.1%的超高η，在具有330的最大品质因数的陶瓷电容器中显示出突破性进展。这项工作表明，控制非均匀极化构型是开发新型高性能近零能量损失储能电容器的有效途径。
