SPS-Prepared High-Entropy (Bi0.2Na0.2Sr0.2Ba0.2Ca0.2)TiO3 Lead-Free Relaxor-Ferroelectric Ceramics with High Energy Storage Density

Compared to batteries and electrochemical capacitors, dielectric capacitors are widely studied because of their huge advantages in terms of charging/discharging speed and power density. In this work, high-entropy (Bi0.2Na0.2Sr0.2Ba0.2Ca0.2)TiO3 lead-free relaxor-ferroelectric ceramics were prepared by both conventional sintering (CS) and spark plasma sintering (SPS). The results showed that the ceramic prepared by SPS obtained a high energy storage density of 6.66 J/cm3 and a satisfied energy storage efficiency of 77.2% under an electric field of 430 kV/cm. This is directly related to the high density, fine grains, number of oxygen vacancies, and composition uniformity of the SPS samples. This study provides a new path for the preparation of high-entropy dielectric energy storage ceramics with high energy storage properties.

[1]  Suwadee Kongparakul,et al.  All-Organic Polymer Dielectric Materials for Advanced Dielectric Capacitors: Theory, Property, Modified Design and Future Prospects , 2022, Polymer Reviews.

[2]  L. An,et al.  Design and preparation of lead-free (Bi0.4Na0.2K0.2Ba0.2)TiO3-Sr(Mg1/3Nb2/3)O3 high-entropy relaxor ceramics for dielectric energy storage , 2022, Chemical Engineering Journal.

[3]  Guangping Zheng,et al.  Tunning the dielectric and energy storage properties of high entropy ceramics (Bi0.2Na0.2K0.2La0.2Sr0.2)(Ti1-xScx)O3 by Sc-doping at B-site in perovskite structure , 2022, Journal of Electroceramics.

[4]  Jiuru Xu,et al.  Enhanced energy storage performance of BaTi0.97Ca0.03O2.97-based ceramics by doping high-entropy perovskite oxide , 2022, Journal of Alloys and Compounds.

[5]  Qinghua Zhang,et al.  High-entropy enhanced capacitive energy storage , 2022, Nature Materials.

[6]  Shiqing Deng,et al.  Giant energy-storage density with ultrahigh efficiency in lead-free relaxors via high-entropy design , 2022, Nature Communications.

[7]  M. Zhang,et al.  Pyrochlore-based high-entropy ceramics for capacitive energy storage , 2022, Journal of Advanced Ceramics.

[8]  Shikuan Sun,et al.  Dielectric temperature stability and energy storage performance of NBT‐based ceramics by introducing high‐entropy oxide , 2022, Journal of the American Ceramic Society.

[9]  Guangping Zheng,et al.  High energy storage density and efficiency in nanostructured (Bi 0.2 Na 0.2 K 0.2 La 0.2 Sr 0.2 )TiO 3 high‐entropy ceramics , 2021, Journal of the American Ceramic Society.

[10]  J. Zhai,et al.  Comparative study of phase structure, dielectric properties and electrocaloric effect in novel high-entropy ceramics , 2021, Journal of Materials Science.

[11]  Shijun Zhao,et al.  High-entropy carbide ceramics: a perspective review , 2021, Tungsten.

[12]  Haibo Zhang,et al.  Review of lead-free Bi-based dielectric ceramics for energy-storage applications , 2021, Journal of Physics D: Applied Physics.

[13]  Wei Sun,et al.  Novel refractory high-entropy ceramics: Transition metal carbonitrides with superior ablation resistance , 2021 .

[14]  A. Mukasyan,et al.  Extremely hard and tough high entropy nitride ceramics , 2020, Scientific Reports.

[15]  F. Gao,et al.  Low-loss high entropy relaxor-like ferroelectrics with A-site disorder , 2020 .

[16]  Qi Zhang,et al.  A review on the development of lead-free ferroelectric energy-storage ceramics and multilayer capacitors , 2020 .

[17]  Haibo Zhang,et al.  Novel NaNbO3–Sr0.7Bi0·2TiO3 lead-free dielectric ceramics with excellent energy storage properties , 2020 .

[18]  Jia Liu,et al.  Dielectric and energy storage properties of flash-sintered high-entropy (Bi0.2Na0.2K0.2Ba0.2Ca0.2)TiO3 ceramic , 2020, Ceramics International.

[19]  Qianwen Zhang,et al.  Microstructure and dielectric properties of high entropy Ba(Zr0.2Ti0.2Sn0.2Hf0.2Me0.2)O3 perovskite oxides , 2020 .

[20]  D. Vinnik,et al.  High Entropy Oxide Phases with Perovskite Structure , 2020, Nanomaterials.

[21]  Qianwen Zhang,et al.  Dielectric properties and electrocaloric effect of high-entropy (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 ceramic , 2019 .

[22]  Jia Liu,et al.  High-entropy environmental barrier coating for the ceramic matrix composites , 2019, Journal of the European Ceramic Society.

[23]  Tyler J. Harrington,et al.  High-Entropy Metal Diborides: A New Class of High-Entropy Materials and a New Type of Ultrahigh Temperature Ceramics , 2016, Scientific Reports.

[24]  Jacob L. Jones,et al.  Entropy-stabilized oxides , 2015, Nature Communications.

[25]  V. M. Goldschmidt,et al.  Die Gesetze der Krystallochemie , 1926, Naturwissenschaften.

[26]  Chunhui Wu,et al.  Enhanced capacitive energy storage and dielectric temperature stability of A-site disordered high-entropy perovskite oxides , 2023, Journal of Materials Science & Technology.

[27]  Xuqing Zhang,et al.  High energy density, temperature stable lead-free ceramics by introducing high entropy perovskite oxide , 2022 .

[28]  Haibo Zhang,et al.  SPS prepared NN-24SBT lead-free relaxor-antiferroelectric ceramics with ultrahigh energy-storage density and efficiency , 2022, Scripta Materialia.

[29]  Wei Zhang,et al.  Fabrication of textured (Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2 high-entropy ceramics , 2021 .