Ultrahigh Energy-Storage in Dual-Phase Relaxor Ferroelectric Ceramics.

Autor: Xiong X; Department of Physical Chemistry, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China., Liu H; Department of Physical Chemistry, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China., Zhang J; Nanjing University of Science and Technology, Nanjing, 210094, China., da Silva LL; Fraunhofer Institute for Mechanics of Materials IWM, 79108, Freiburg, Germany., Sheng Z; Wuhan University of Technology, Wuhan, 430070, China., Yao Y; Department of Physical Chemistry, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China., Wang G; University of Manchester, Manchester, S13 9PL, UK., Hinterstein M; Fraunhofer Institute for Mechanics of Materials IWM, 79108, Freiburg, Germany., Zhang S; University of Wollongong, Wollongong, NSW, 2500, Australia., Chen J; Department of Physical Chemistry, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, China.; Hainan University, Haikou, 570228, China.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Nov; Vol. 36 (48), pp. e2410088. Date of Electronic Publication: 2024 Oct 10.
DOI: 10.1002/adma.202410088
Abstrakt: High-performance dielectric energy-storage ceramics are beneficial for electrostatic capacitors used in various electronic systems. However, the trade-off between reversible polarizability and breakdown strength poses a significant challenge in simultaneously achieving high energy density and efficiency. Here a strategy is presented to address this issue by constructing a dual-phase structure through in situ phase separation. (Bi 0.5 Na 0.5 )TiO 3 -BaTiO 3 -based relaxor ferroelectric ceramics are developed, creating a grain-separated dual perovskite phase structure using a facile solid-state reaction method. These ceramics feature two interactive relaxor phases with diversified nanoscale polar structures and heterogeneous grain boundaries, synergistically contributing to high polarization with low hysteresis, substantially increased resistivity, and suppressed electrostrain. Remarkably, a record-high energy density of 23.6 J cm -3 with a high efficiency of 92% under 99 kV mm -1 is achieved in the bulk ceramic capacitor. This strategy holds promise for enhancing overall energy-storage performance and related functionalities in ferroelectrics.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: