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

Synthetically enhancing the recoverable energy density (W rec) and efficiency (η) is important to energy storage dielectric capacitors. ABO 3 perovskite structure material (Pb 0.96-α Ba 0.04 La α)(Zr 0.65 Sn 0.3 Ti 0.05)O 3 (PBLZST) is a typical antiferroelectric energy storage dielectric and has been widely studied due to the high polarization. But its low breakdown strength (E b) limits its further application. Many researchers focused on single-doping in PBLZST and achieved high E b 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 W rec 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. • Comprehensively enhancing energy storage performance of antiferroelectric material PBLZST. • Compensating for the lack of research on donor-acceptor co-doping in PBLZST. • Analysis of the A-site/B-site donor-acceptor co-doping effect on antiferroelectric and dielectric behavior PBLZST. [ABSTRACT FROM AUTHOR]