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.

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