Design of a KNN-BZT Ceramic with High Energy Storage Properties and Transmittance under Low Electric Fields

Abstract

With the advancement of science and technology, single-function ceramics have been difficult to meet the rapid development of electronic components. It is of great significance to find and develop multifunctional ceramics with excellent performance and environmental friendliness (such as good energy storage and transparency). Especially, the realization of its excellent performance under low electric fields has more reference and practical value. In this study, by Bi(Zn 0.5 Ti 0.5 )O 3 (BZT) modification in (K 0.5 Na 0.5 )NbO 3 (KNN), reducing grain size, and increasing band gap energy, the purpose of improving energy storage performance and transparency has been achieved under low electric field. The results show that the submicron average grain size decreased to 0.9 μm and the band gap energy (E g ) increased to 2.97 eV for 0.90KNN-0.10BZT ceramics. The transparency is up to 69.27% in the near-infrared region (1344 nm) and the energy storage density is 2.16 J/cm 3 under 170 kV/cm. Moreover, the 0.90KNN-0.10BZT ceramic exhibits a power density (P D ) of 17.50 MW/cm 3 and the stored energy can be discharged in 1.60 μs at 140 kV/cm. This revealed a potential application of KNN-BZT ceramic as an energy storage and transparent capacitor in the electronics industry.

Energy storage and discharge performance for (1−x)BaSrTiO3−xBi(Zn1/2Ti1/2)O3 ceramics

“…Compared to batteries and supercapacitors, dielectric capacitors offer advantages such as ultra‐fast charging and discharging, thermal stability, long lifespan, and excellent mechanical strength. However, their energy storage density and efficiency have remained challenging issues in the pulse power technology 1–3 . The limited energy storage density of dielectric capacitors results in bulkier and more expensive components, while low energy storage efficiency leads to heat generation and power loss.…”

“…However, their energy storage density and efficiency have remained challenging issues in the pulse power technology. [1][2][3] The limited energy storage density of dielectric capacitors results in bulkier and more expensive components, while low energy storage efficiency leads to heat generation and power loss. Hence, it is essential to propose effective strategies for improving the energy storage performance of dielectric capacitors.…”