Ordered Heterogeneous Interfaces Enable Temperature-Insensitive and Ultrahigh-Energy-Storage Multilayer Ceramic Capacitors.
basic_science · Level V
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- Record sourced from PubMed, PMID 41588917.
- Also identified by DOI 10.1002/adma.202520618.
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Abstract
Achieving both high energy storage density and excellent thermal stability in lead-free multilayer ceramic capacitors (MLCCs) has long been a critical challenge for advanced electronic systems. To address this issue, we propose an innovative strategy to simultaneously improve both properties by constructing ordered heterogeneous interfaces through embedding parallel-aligned Al<sub>2</sub>O<sub>3</sub> plates in 0.6SrTiO<sub>3</sub>-0.4Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub> (0.6ST-0.4BNT) lead-free ceramics. This approach effectively suppresses the charge carrier injection and transport, yielding an ultrahigh recoverable energy storage density of 16.0 J cm<sup>-3</sup> with a giant breakdown strength of 1140 kV cm<sup>-1</sup> in Al<sub>2</sub>O<sub>3</sub> modified 0.6ST-0.4BNT based MLCCs, which outperforms most state-of-the-art dielectric ceramics. Furthermore, the MLCCs exhibit superior thermal stability with variation less than 3% across a broad temperature range of 20-160 °C. The overall superior performance underscores the potential of the ordered heterogeneous interface engineering in advancing the thermally stable high-density energy storage materials for next-generation MLCC applications.