High energy storage density under low electric fields in BiFeO3-based ceramics with max configurational entropy

Xiaohui Tang; Hongjun Zhang; Fangzhe Li; Dongliang Wang; Yong Huang; Hua Ke

doi:10.1016/j.jeurceramsoc.2023.07.047

High energy storage density under low electric fields in BiFeO₃-based ceramics with max configurational entropy

Xiaohui Tang
, Hongjun Zhang
, Fangzhe Li
, Dongliang Wang
, Yong Huang
, Hua Ke^*

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology
Harbin Institute of Technology
Harbin Institute of Technology
The Su Zhou Bohai Microsystem Company Ltd.

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Dielectric capacitors play an increasingly important role in power systems because of their fast charging and discharging speed. Applications are usually limited due to the low W_rec. We design materials with high values of ΔP(P_max-P_r) and recoverable energy storage density(W_rec) from the high entropy perspective. Two single phases with a large Curie temperature T_c difference have been selected, which leads to the enlarged entropy. The ceramics (Bi_0.85Nd_0.1Sm_0.05)_1-xBa_x)(Fe_1-xTi_x)O₃(BNSBFT_x) are prepared by the solid-state reaction. As x increases, the corresponding configuration entropy(S_config) goes from 1.4 R to 1.52 R. The increased entropy destroys the long-range order, accompanied by the reduced remanent polarization(P_r) and the improved W_rec. The W_rec of BNSBFT_0.5 ceramics reaches 4.9 J/cm³ at a low field of 250 kV/cm. Both temperature change(∼ 0.5% from 30 °C to 140 °C) and frequency variation(∼ 4.8% from 1 Hz∼50 Hz) in W_rec show excellent stability.

Original language	English
Pages (from-to)	6875-6882
Number of pages	8
Journal	Journal of the European Ceramic Society
Volume	43
Issue number	15
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2023.07.047
State	Published - Dec 2023

Keywords

(BiNdSm)BaFeTiO
Energy density
High entropy
Stability

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10.1016/j.jeurceramsoc.2023.07.047

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title = "High energy storage density under low electric fields in BiFeO3-based ceramics with max configurational entropy",

abstract = "Dielectric capacitors play an increasingly important role in power systems because of their fast charging and discharging speed. Applications are usually limited due to the low Wrec. We design materials with high values of ΔP(Pmax-Pr) and recoverable energy storage density(Wrec) from the high entropy perspective. Two single phases with a large Curie temperature Tc difference have been selected, which leads to the enlarged entropy. The ceramics (Bi0.85Nd0.1Sm0.05)1-xBax)(Fe1-xTix)O3(BNSBFTx) are prepared by the solid-state reaction. As x increases, the corresponding configuration entropy(Sconfig) goes from 1.4 R to 1.52 R. The increased entropy destroys the long-range order, accompanied by the reduced remanent polarization(Pr) and the improved Wrec. The Wrec of BNSBFT0.5 ceramics reaches 4.9 J/cm3 at a low field of 250 kV/cm. Both temperature change(∼ 0.5\% from 30 °C to 140 °C) and frequency variation(∼ 4.8\% from 1 Hz∼50 Hz) in Wrec show excellent stability.",

keywords = "(BiNdSm)BaFeTiO, Energy density, High entropy, Stability",

author = "Xiaohui Tang and Hongjun Zhang and Fangzhe Li and Dongliang Wang and Yong Huang and Hua Ke",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

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doi = "10.1016/j.jeurceramsoc.2023.07.047",

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T1 - High energy storage density under low electric fields in BiFeO3-based ceramics with max configurational entropy

AU - Tang, Xiaohui

AU - Zhang, Hongjun

AU - Li, Fangzhe

AU - Wang, Dongliang

AU - Huang, Yong

AU - Ke, Hua

PY - 2023/12

Y1 - 2023/12

N2 - Dielectric capacitors play an increasingly important role in power systems because of their fast charging and discharging speed. Applications are usually limited due to the low Wrec. We design materials with high values of ΔP(Pmax-Pr) and recoverable energy storage density(Wrec) from the high entropy perspective. Two single phases with a large Curie temperature Tc difference have been selected, which leads to the enlarged entropy. The ceramics (Bi0.85Nd0.1Sm0.05)1-xBax)(Fe1-xTix)O3(BNSBFTx) are prepared by the solid-state reaction. As x increases, the corresponding configuration entropy(Sconfig) goes from 1.4 R to 1.52 R. The increased entropy destroys the long-range order, accompanied by the reduced remanent polarization(Pr) and the improved Wrec. The Wrec of BNSBFT0.5 ceramics reaches 4.9 J/cm3 at a low field of 250 kV/cm. Both temperature change(∼ 0.5% from 30 °C to 140 °C) and frequency variation(∼ 4.8% from 1 Hz∼50 Hz) in Wrec show excellent stability.

AB - Dielectric capacitors play an increasingly important role in power systems because of their fast charging and discharging speed. Applications are usually limited due to the low Wrec. We design materials with high values of ΔP(Pmax-Pr) and recoverable energy storage density(Wrec) from the high entropy perspective. Two single phases with a large Curie temperature Tc difference have been selected, which leads to the enlarged entropy. The ceramics (Bi0.85Nd0.1Sm0.05)1-xBax)(Fe1-xTix)O3(BNSBFTx) are prepared by the solid-state reaction. As x increases, the corresponding configuration entropy(Sconfig) goes from 1.4 R to 1.52 R. The increased entropy destroys the long-range order, accompanied by the reduced remanent polarization(Pr) and the improved Wrec. The Wrec of BNSBFT0.5 ceramics reaches 4.9 J/cm3 at a low field of 250 kV/cm. Both temperature change(∼ 0.5% from 30 °C to 140 °C) and frequency variation(∼ 4.8% from 1 Hz∼50 Hz) in Wrec show excellent stability.

KW - (BiNdSm)BaFeTiO

KW - Energy density

KW - High entropy

KW - Stability

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DO - 10.1016/j.jeurceramsoc.2023.07.047

M3 - 文章

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SN - 0955-2219

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JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 15

ER -

High energy storage density under low electric fields in BiFeO₃-based ceramics with max configurational entropy

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