Ultra-high energy storage in relaxor ferroelectric MLCCs at elevated temperatures via entropy modulated strain heterogeneity.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41083435.
- Also identified by DOI 10.1038/s41467-025-64113-7 and PMC identifier 12518529.
- Licence recorded as CC BY-NC-ND.
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Abstract
Multilayer ceramic capacitors are pivotal components in pulse power systems due to their ultra-high power density. However, given the demanding service conditions in aerospace and oil drilling applications, the need to enhance high-temperature energy storage remains particularly urgent. In this work, we employ a strain modulation strategy by enhancing configuration entropy within bismuth sodium titanate-based ceramics. This approach enhances relaxor behavior, suppresses electron migration, and improves structural stability and breakdown strength at elevated temperatures. Notably, the resulting multilayer ceramic capacitors exhibit a substantial recoverable energy density of 19.0 J cm<sup>-3</sup> and an impressive efficiency of 90% under an electric field of 1320 kV cm<sup>-1</sup>. Furthermore, these capacitors sustain a high energy density above 11.0 J cm<sup>-3</sup> even at 200 °C. This extraordinary high-temperature energy storage performance surpasses those of recently reported multilayer ceramic capacitors. Our findings underscore the significant potential of strain modulation as a strategy for designing high-temperature energy storage materials.