Effect of acceptor-donor co-doping on the energy storage performance of antiferroelectric PBLZST

Abstract

Synthetically enhancing the recoverable energy density (Wrec) and efficiency (η) is important to energy storage dielectric capacitors. ABO3 perovskite structure material (Pb0.96-αBa0.04Laα)(Zr0.65Sn0.3Ti0.05)O3 (PBLZST) is a typical antiferroelectric energy storage dielectric and has been widely studied due to the high polarization. But its low breakdown strength (Eb) limits its further application. Many researchers focused on single-doping in PBLZST and achieved high Eb or η, but synthetical enhancement is still a difficulty. In this work, we conducted A-site acceptor-donor co-doping and B-site acceptor-donor co-doping in PBLZST, respectively. Li and La were introduced into PBLZST at A-site and Nb-Mn were co-doped in PBLZST at B-site. XRD and EDS patterns suggest the pure phase of these doped samples. It is found that Li-La co-doping and Nb-Mn co-doping can both increase the breakdown strength from 156.2 kV/cm (pure PBLZST) to 304.5 kV/cm and 273.3 kV/cm, respectively. While, the Wrec also respectively increases to 5.56 J/cm3 (Li-La) and 3.71 J/cm3 (Nb-Mn) from 2.97 J/cm3, suggesting a comprehensive enhancement in energy storage performance. The mechanism of the enhancement was discussed. This work can provide a strategy to regulate and control the energy storage performance.