High energy storage properties for the lead-free NBT-0.1BFO-0.068La relaxor ferroelectric film
Source abstract
Abstract
Abstract For purpose of improving the energy storage properties for the Na0.5Bi0.5TiO3 (NBT) film, NBT and BiFeO3 (BFO) were formed into solid solution. The outcomes are that the recoverable energy density (Ure) has been greatly improved, but the energy storage efficiency (η) has decreased. In this study, doping the best ratio of 0.9Na0.5Bi0.5TiO3-0.1BiFeO3 (NBT-0.1BFO) solid solution film with La3+ is to improve η by enhancing the relaxor properties, so as to improve both Ure and η for the NBT film. A sol-gel process was used to prepare lead-free NBT-0.1BFO-xLa (x = 0.000, 0.023, 0.045, 0.068, 0.090) single-phase perovskite solid solution films. La3+ replaces Bi3+ to enhance the disorder degree of cations, which disrupts the ferroelectric long-range order in the original matrix and generates nano-scale polar regions (NPRs), giving rise to enhanced relaxor properties. This further reduces the remanent polarization (Pr), thereby improving η. Consequently, the NBT-0.1BFO-0.068La film exhibits a high Ure (52.4 J/cm3) and a considerable η (60.3%) under the electric field of 2700 kV/cm, and both Ure and η are improved compared with the NBT film. Moreover, the NBT-0.1BFO-0.068La film has high temperature stability ranging from −60 °C to 80 °C, indicating that it has potential application value for energy storage capacitors.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Dielectric materials and actuators
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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