A-site high-entropy additives for energy storage
Entropy engineering has recently emerged as a promising strategy for enhancing the performance of energy-storage ceramics. In this work, four high-entropy compositions with equimolar ratios were designed, and their single-phase formation behavior was analyzed by combining formation-energy calculatio...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/456973 |
| Acceso en línea: | https://hdl.handle.net/2117/456973 https://dx.doi.org/10.1063/5.0284543 |
| Access Level: | acceso abierto |
| Palabra clave: | Entropy Entropia Àrees temàtiques de la UPC::Física::Termodinàmica |
| Sumario: | Entropy engineering has recently emerged as a promising strategy for enhancing the performance of energy-storage ceramics. In this work, four high-entropy compositions with equimolar ratios were designed, and their single-phase formation behavior was analyzed by combining formation-energy calculations with latticedistortion evaluation. A potential quasi-linear high-entropy additive, (Na0.2La0.2Ba0.2Sr0.2Ca0.2)TiO3, was thereby identified. Experimental results reveal that this composition delivers a high recoverable energy-storage density (Wrec) of 3.83 J cm3 and an ultrahigh efficiency (¿) of 94.4% under an electric field of 430 kV cm-1, confirming its effectiveness as a high-entropy energy-storage modifier. This study integrates experimental characterization with computational analysis to preliminarily assess the phase stability of high-entropy perovskite ceramics, offering theoretical guidance for future material design and compositional optimization. |
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