首页|(163139)Achieving ultrahigh energy storage performance over a broad temperature range in (Bi_(0.5)Na_(0.5))TiO_3-based eco-friendly relaxor ferroelectric ceramics via multiple engineering processes
(163139)Achieving ultrahigh energy storage performance over a broad temperature range in (Bi_(0.5)Na_(0.5))TiO_3-based eco-friendly relaxor ferroelectric ceramics via multiple engineering processes
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NSTL
Elsevier
The development of ABO_3 perovskite-structured dielectric materials with high recoverable energy storage density (V_(rec)) and power density (P_D) is crucial for the downsizing of pulsed power devices. Despite several research efforts, achieving a high W_(rec) over a wide working temperature range in an environmentally benign system remains a difficulty. A synergistic design strategy is given here, which includes concurrently doping at the A- and B-site to achieve a spread and depressed dielectric response, adding sintering aids, and employing advanced viscous polymer rolling technology for dense and ultra-thin ceramic samples, respectively. Finally, at a relatively low electric field of 380 kV/cm, an ultrahigh W_(rec) of 6.57 J/cm~3 is realized in (Bi_(0.5)Na_(0.5))_(0.93)Ca_(0.07)Ti_(0.85)Zr_(0.15)O_3-0.5 wt% Li_2CO_3 component, which benefits from gentle polarization saturating and improved breakdown strength. The W_(rec) can be maintained above 6 J/cm~3 while maintaining strong thermal stability (variation ≤ ± 3%) over a temperature range of 30-150 °C. Because BNT-based materials have such high energy storage performance and temperature stability, they are not only a promising candidate for replacing lead-based dielectrics, but also a valuable guide for developing new high-performance ferroelectric materials for future energy storage devices in the pulsed power system.
BNTRelaxor ferroelectricsEnergy storageEco-friendlyViscous polymer rolling
Leiyang Zhang、Shuyao Cao、Yang Li
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Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi'an Jiaotong Universit
State Key Laboratory of Solidification Processing, MIITKey Laboratory of Radiation Detection Materials and Devices, USI Institute of Intelligence Materials and Structure, NPU-QJMUL Joint Research Institute of Advanced Materials and Structure, School of Ma
School of Materials and Energy, Southwest University, Chongqing 400715, China
NSTL
Elsevier
