Premium
High Energy Storage Efficiency with Fatigue Resistance and Thermal Stability in Lead‐Free Na 0.5 K 0.5 NbO 3 /BiMnO 3 Solid‐Solution Films
Author(s) -
Sun Yizhu,
Zhou Yunpeng,
Lu Qingshan,
Zhao Shifeng
Publication year - 2018
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201700364
Subject(s) - materials science , ferroelectricity , dielectric , solid solution , thermal stability , energy storage , coercivity , polarization (electrochemistry) , electric field , condensed matter physics , optoelectronics , thermodynamics , metallurgy , chemical engineering , chemistry , power (physics) , physics , quantum mechanics , engineering
The ferroelectric, leakage, dielectric, and energy storage properties of lead‐free Na 0.5 K 0.5 NbO 3 /BiMnO 3 (KNN/BMO) solid‐solution films are investigated. The strong ferroelectric relaxation behaviors of slim ferroelectricity with small remanent polarization and coercive field induce a high energy‐storage density and efficiency at room temperature. The energy density reaches 14.8 J cm −3 , even the efficiency is up to 79.79% under the applied electric field of 985.66 kV cm −1 . Moreover, the energy storage performances of KNN/BMO solid‐solution films exhibit good thermal stability over a wide temperature range and high ferroelectric fatigue endurance after switching 10 6 bipole electrical cycles. KNN/BMO solid‐solution films can replace lead‐based films and other outstanding lead‐free systems in the energy storage performance.