Ultra-high energy storage performance with mitigated polarization saturation in lead-free relaxors
RIS ID
134930
Abstract
Relaxor ferroelectric ceramics have attracted much attention for storing the electricity generated from clean and renewable energy sources due to their high permittivity and near-zero remnant polarization. The polarization of many relaxor based ceramics tends to saturate at high electric fields, however, which limits their energy storage performance. In this study, a lead-free Sn-modified (Na 0.5 Bi 0.5 )TiO 3 -SrTiO 3 system is investigated, where mitigated polarization saturation is observed with the addition of Sn 4+ , as a result of the different electronic configurations between d 10 Sn 4+ and d 0 Ti 4+ . As expected, high energy density of 3.4 J cm -3 and energy efficiency of 90% are simultaneously achieved in (Na 0.25 Bi 0.25 Sr 0.5 )(Ti 0.8 Sn 0.2 )O 3 ceramic. In addition, the ceramic exhibits good thermal stability, with the energy storage property variations below 5% over the temperature range of -20 °C to 150 °C, and satisfactory cycling stability with a variation of less than 8% over 10 5 cycles. All these merits demonstrate that the (Na 0.25 Bi 0.25 Sr 0.5 )(Ti 0.8 Sn 0.2 )O 3 ceramic has great potential for high power energy storage applications.
Grant Number
ARC/FT140100698
Publication Details
Yang, L., Kong, X., Cheng, Z. & Zhang, S. (2019). Ultra-high energy storage performance with mitigated polarization saturation in lead-free relaxors. Journal of Materials Chemistry A, 7 (14), 8573-8580.