Influence of NaNbO3 addition to Bi0.5(Na0.8K0.2)0.5TiO3 lead-free ceramics on the energy storage properties

• Published in: Solid state communications Vol. 371; p. 115259
• Main Authors: Wang, L.G., Su, X.F., Zhu, C.M., Yu, G.B., Huang, R.T.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-10-2023
• Subjects: Bi0·5Na0·5TiO3; Ceramics; Energy storage; NaNbO3; Ceramics; Bi0·5Na0·5TiO3; NaNbO3; Energy storage
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/j.ssc.2023.115259

(1-x)Bi0·5(Na0·8K0.2)0.5TiO3/xNaNbO3 (x = 0–0.1) ceramics are prepared through solid-state reaction. The incorporation of NaNbO3 leads to slight crystal distortion with nanoscale particle size, improving the relaxor phenomenon by destruction of the original ferroelectric long-range order, which finally contributes to the enhanced energy storage density and efficiency. Particularly, the outstanding energy storage properties are observed at x = 0.075 with well thermal, frequency and cycle stability. Moreover, the highest energy storage density and efficiency are obtained at ∼160 °C with x = 0.075. Further, the well charge-discharge performance is also achieved. These results indicate that designing Bi0·5(Na0·8K0.2)0.5TiO3-based relaxor ferroelectrics through NaNbO3 is an effective method to realize excellent energy storage performance in dielectric capacitors.
•(1-x)Bi0·5(Na0·8K0.2)0.5TiO3/xNaNbO3 (x = 0–0.1) ceramics are prepared through solid-state reaction.•The incorporated NaNbO3 leads to crystal distortion with improving the relaxor phenomenon.•The enhanced energy storage density and efficiency are observed with addition of NaNbO3.