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

Zhonghua Dai; Fanbo Zhang; Muhammad Nasir Rafiq; Chenxi Liu; Xin Wang; Shuitao Gu; Shintaro Yasui

doi:10.1021/acsomega.2c07646

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

ACS Omega. 2023 Feb 14;8(8):7883-7890. doi: 10.1021/acsomega.2c07646. eCollection 2023 Feb 28.

Authors

Zhonghua Dai¹, Fanbo Zhang¹, Muhammad Nasir Rafiq¹, Chenxi Liu¹, Xin Wang¹, Shuitao Gu², Shintaro Yasui^{3

4}

Affiliations

¹ School of Opto-Electronical Engineering, Xi'an Technological University, Xi'an 710032, China.
² School of Civil Engineering, Chongqing University, Chongqing 400044, China.
³ Laboratory for Materials and Structures Zero-Carbon Energy, Institute of Innovative Research, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan.
⁴ Laboratory for Materials and Structures, Tokyo Institute of Technology, Yokohama 226-8503, Japan.

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_0.5Ti_0.5)O₃ (BZT) modification in (K_0.5Na_0.5)NbO₃ (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/cm³ under 170 kV/cm. Moreover, the 0.90KNN-0.10BZT ceramic exhibits a power density (P _D) of 17.50 MW/cm³ 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.