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High-entropy enhanced capacitive energy storage

Journal Article


Abstract


  • Electrostatic dielectric capacitors are essential components in advanced electronic and electrical power systems due to their ultrafast charging/discharging speed and high power density. A major challenge, however, is how to improve their energy densities to effectuate the next-generation applications that demand miniaturization and integration. Here, we report a high-entropy stabilized Bi2Ti2O7-based dielectric film that exhibits an energy density as high as 182 J cm���3 with an efficiency of 78% at an electric field of 6.35 MV cm���1. Our results reveal that regulating the atomic configurational entropy introduces favourable and stable microstructural features, including lattice distorted nano-crystalline grains and a disordered amorphous-like phase, which enhances the breakdown strength and reduces the polarization switching hysteresis, thus synergistically contributing to the energy storage performance. This high-entropy approach is expected to be widely applicable for the development of high-performance dielectrics.

Publication Date


  • 2022

Citation


  • Yang, B., Zhang, Y., Pan, H., Si, W., Zhang, Q., Shen, Z., . . . Lin, Y. H. (2022). High-entropy enhanced capacitive energy storage. Nature Materials, 21(9), 1074-1080. doi:10.1038/s41563-022-01274-6

Scopus Eid


  • 2-s2.0-85131399522

Web Of Science Accession Number


Start Page


  • 1074

End Page


  • 1080

Volume


  • 21

Issue


  • 9

Place Of Publication


Abstract


  • Electrostatic dielectric capacitors are essential components in advanced electronic and electrical power systems due to their ultrafast charging/discharging speed and high power density. A major challenge, however, is how to improve their energy densities to effectuate the next-generation applications that demand miniaturization and integration. Here, we report a high-entropy stabilized Bi2Ti2O7-based dielectric film that exhibits an energy density as high as 182 J cm���3 with an efficiency of 78% at an electric field of 6.35 MV cm���1. Our results reveal that regulating the atomic configurational entropy introduces favourable and stable microstructural features, including lattice distorted nano-crystalline grains and a disordered amorphous-like phase, which enhances the breakdown strength and reduces the polarization switching hysteresis, thus synergistically contributing to the energy storage performance. This high-entropy approach is expected to be widely applicable for the development of high-performance dielectrics.

Publication Date


  • 2022

Citation


  • Yang, B., Zhang, Y., Pan, H., Si, W., Zhang, Q., Shen, Z., . . . Lin, Y. H. (2022). High-entropy enhanced capacitive energy storage. Nature Materials, 21(9), 1074-1080. doi:10.1038/s41563-022-01274-6

Scopus Eid


  • 2-s2.0-85131399522

Web Of Science Accession Number


Start Page


  • 1074

End Page


  • 1080

Volume


  • 21

Issue


  • 9

Place Of Publication