Excellent energy storage and discharge performances in Na<sub>1/2</sub>Bi<sub>1/2</sub>TiO<sub>3</sub>-based ergodic relaxors by enlarging the [AO<sub>12</sub>] cages
Miaomiao Li, Mankang Zhu, Mupeng Zheng, Yudong Hou, Jitong Wang, Xiaolian Chao, Zupei Yang, Jinling Zhou, Ke Wang, Xiaoxing Ke
Abstract
By introducing K 0.5 Bi 0.5 (Zn 1/3 Nb 2/3 )O 3 , the [AO 12 ] cages are enlarged, which enhances the local polarization; meanwhile, the long-range correlations are disrupted, which renders PNRs percolate to room temperature. Finally, a high recoverable energy density of 5.1 J cm −3 and a high efficiency over 80% are obtained.
Topics & Concepts
Materials scienceErgodic theoryPolarization (electrochemistry)Energy densityRange (aeronautics)ThermodynamicsEngineering physicsPhysical chemistryPhysicsComposite materialMathematicsChemistryMathematical analysisFerroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis