High energy storage properties in Ca0.7La0.2TiO3-modified NaNbO3-based lead-free antiferroelectric ceramics

In this work, (1 -x)(0.92NaNbO(3)-0.08BaTiO(3))-xCa(0.7)La(0.2)TiO(3) (NNBT -xCIT) ceramics were successfully designed and prepared by the solid-state reaction method. Investigations on the structure, dielectric, and energy storage properties were performed. The NNBT -0.25CLT ceramic with orthorhombic phase at room temperature was found to exhibit extremely small grain size and compacted microstructure. A large W-rec of 3.1 J/cm(3) and a high eta of 91.5% under the electric field of 360 kV/cm were achieved simultaneously in the sample. In addition, the energy storage performance of the sample exhibits thermal stability over the temperature range of 25-140 degrees C and the frequency range of 5-500 Hz. The charge and discharge tests reveal that the ceramic shows a large current density C-D of 965 A/cm(2) and power density P-D of 154 MW/cm(3). This work demonstrates that the NNBT-0.25CLT ceramic is a prospective energy storage material for potential application in the field of pulsed power devices.

Automated summary

In this work, (1-x)(0.92NaNbO(3)-0.08BaTiO(3))-xCa(0.7)La(0.2)TiO(3) (NNBT -xCIT) ceramics were successfully designed and prepared by the solid-state reaction method. Investigations on the structure, dielectric, and energy storage properties were performed. The NNBT -0.25CLT ceramic with orthorhombic phase at room temperature was found to exhibit extremely small grain size and compacted microstructure. A large W-rec of 3.1 J/cm(3) and a high eta of 91.5% under the electric field of 360 kV/cm were achieved simultaneously in the sample. In addition, the energy storage performance of the sample exhibits thermal stability over the temperature range of 25-140 degrees C and the frequency range of 5-500 Hz. The charge and discharge tests reveal that the ceramic shows a large current density C-D of 965 A/cm(2) and power density P-D of 154 MW/cm(3). This work demonstrates that the NNBT-0.25CLT ceramic is a prospective energy storage material for potential application in the field of pulsed power devices.