Issue 33, 2024

Glass modified Na0.5Bi0.5TiO3-based energy-storage ceramics for high-temperature applications at low/moderate electric fields

Abstract

Given the necessity to spur the progress of energy-storage equipment for high pulse power systems, it is important to tackle the critical issue of concurrently optimizing energy storage density (Wrec), efficiency (η) and stability at elevated temperatures in Na0.5Bi0.5TiO3-based ceramics. This work puts forward an innovative optimizing strategy via glass addition in 0.85(Na0.5Bi0.5)0.75Sr0.25TiO3–0.15Ca(Mg1/3Ta2/3)O3 (NBST–0.15CMT) ceramics to lower sintering temperature through liquid sintering, which in turn triggers refined grains and boosts breakdown strength (Eb). Moreover, a low but temperature-stable permittivity caused by 40Na2O–18CaO–42SiO2 (NCS) glass assists in ameliorating high-temperature stability of energy storage properties (ESPs) and enhances Eb by prolonging saturation polarization. Ultimately, 6.0 wt% NCS glass-additive composition accomplishes anticipated ESPs (Wrec = 5.5 J cm−3 and η = 92.0%) under a moderate electric field and maintains remarkable stability over the temperature range of 30–130 °C. This study verifies that multi-material mixture engineering is a promising candidate technique for fabricating pulse energy-storage ceramics with high-temperature stability under low/moderate electric fields.

Graphical abstract: Glass modified Na0.5Bi0.5TiO3-based energy-storage ceramics for high-temperature applications at low/moderate electric fields

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Article information

Article type
Paper
Submitted
12 jun 2024
Accepted
08 jul 2024
First published
09 jul 2024

J. Mater. Chem. C, 2024,12, 12784-12793

Glass modified Na0.5Bi0.5TiO3-based energy-storage ceramics for high-temperature applications at low/moderate electric fields

C. Wu, Y. Pu, X. Lu, Y. Ning, Z. Chen, L. Zhang and Y. Yang, J. Mater. Chem. C, 2024, 12, 12784 DOI: 10.1039/D4TC02435D

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