Enhanced Dielectric Energy Storage Performance of 0.45NaBiTiO-0.55SrBiTiO/AlN 0-3 Type Lead-Free Composite Ceramics.

ACS Appl Mater Interfaces

School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China.

Published: April 2022

AI Article Synopsis

  • * The research focused on creating a composite material (0.45NaBiTiO-0.55SrBiTiO/ AlN) to enhance breakdown strength by incorporating different amounts of AlN.
  • * The optimal NBT-SBT/6AlN composite achieved a high breakdown strength of 360 kV/cm, an energy density of 5.53 J/cm, and demonstrated impressive stability across various frequencies and temperatures, making it a promising dielectric material for energy storage applications.

Article Abstract

NaBiTiO (NBT) ceramic is the promising dielectric material for energy storage devices due to its high maximum polarizability and temperature stability. However, its low breakdown strength limits its application. Here, we prepared 0-3 type composite 0.45NaBiTiO-0.55SrBiTiO/ wt % AlN (NBT-SBT/AlN) to increase the breakdown strength. The effects of the various AlN contents on the phase composition, microstructures, dielectric, and energy storage properties of NBT-SBT were systematically discussed. The result showed that the enhanced energy storage properties were obtained by introducing AlN particles. The NBT-SBT/6AlN composite ceramics showed a high breakdown strength of 360 kV/cm, large energy density of 5.53 J/cm, and energy efficiency of 90%. Meanwhile, the excellent frequency (10-500 Hz) and temperature stability (25-125 °C) were exhibited with the fluctuation of energy storage within 9% and energy efficiency more than 87%, suggesting that the 0-3 composite NBT-SBT/AlN is a candidate dielectric material for the dielectric energy storage.

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http://dx.doi.org/10.1021/acsami.2c01406DOI Listing

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