Issue 7, 2020

(Na0.5Bi0.5)0.7Sr0.3TiO3 modified by Bi(Mg2/3Nb1/3)O3 ceramics with high energy-storage properties and an ultrafast discharge rate

Abstract

The design of ceramic dielectrics with high energy-storage properties and outstanding temperature stability is an important but challenging topic in advanced electronic and electrical power systems. Here, we utilized a strategy to achieve synergistic enhancement of energy density and energy efficiency in the (1 − x)(Na0.5Bi0.5)0.7Sr0.3TiO3xBi(Mg2/3Nb1/3)O3 systems based on refined grain size and the introduction of Bi3+'s lone pair electron 6s2 configuration, respectively. As a result, a giant discharge energy density of 3.45 J cm−3 and a high energy efficiency of 88.01% were simultaneously achieved in the 0.85NBST–0.15BMN ceramic, which precede those of recently reported lead-free dielectric ceramic materials. Meanwhile, excellent temperature (30–150 °C) and frequency (1–100 Hz) stability were also observed at 200 kV cm−1. Moreover, an outstanding power density (PD) of 38.47 MW cm−3 and an ultrafast discharge rate (t0.9) of 52.8 ns were also achieved in the 0.85NBST–0.15BMN ceramic at 120 kV cm−1. These results may provide a feasible approach to develop more NBST-based lead-free ceramics with vastly improved energy-storage properties.

Graphical abstract: (Na0.5Bi0.5)0.7Sr0.3TiO3 modified by Bi(Mg2/3Nb1/3)O3 ceramics with high energy-storage properties and an ultrafast discharge rate

Supplementary files

Article information

Article type
Paper
Submitted
13 nov 2019
Accepted
10 dec 2019
First published
12 dec 2019

J. Mater. Chem. C, 2020,8, 2258-2264

(Na0.5Bi0.5)0.7Sr0.3TiO3 modified by Bi(Mg2/3Nb1/3)O3 ceramics with high energy-storage properties and an ultrafast discharge rate

Y. Lin, D. Li, M. Zhang and H. Yang, J. Mater. Chem. C, 2020, 8, 2258 DOI: 10.1039/C9TC06218A

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