In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 11, No. 10 ( 2023), p. 4937-4945
Abstract:
Inspired by the development of high-power/pulsed-power techniques, dielectric capacitors with enormous power densities as well as ultrafast charge/discharge speeds have captured increasing attention and extensive research, particularly ceramic capacitors. Nevertheless, the limited recoverable energy density ( W rec ) and/or low energy storage efficiency ( η ) of ceramic capacitors delay their applications in capacitive energy storage. Herein, single phase high-entropy (Bi 1/6 Na 1/6 Ba 1/6 Sr 1/6 Ca 1/6 Pb 1/6 )Ti 1− x Zr x O 3 dielectric ceramics are designed and investigated. The enhanced dielectric relaxation behavior and fine grain size gave rise to decreased remnant polarization ( P r ) and promoted electric breakdown strength ( E b ). The special electronic structure of Pb 2+ and Bi 3+ favors retaining relatively large maximum polarization ( P max ). Accordingly, ultrahigh W rec of 8.8 J cm −3 , high η of 92.5%, and exceptional thermal reliability ( W rec = 4.5 J cm −3 ± 6.5% in the range of 25–180 °C) are synchronously achieved in the optimum composition of x = 0.12, providing a feasible strategy to explore high-performance dielectric ceramics for applications in electrostatic energy storage.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702232-8
