Excellent energy density and efficiency in Ba and Sr co-doped (Pb,La)(Zr, Sn)O3 antiferroelectric ceramics

Energy storage density is an important criterion for evaluating energy storage performance of materials. In this work, (Pb0.98La0.02)(Zr0.45Sn0.55)0.995O3 and (Pb0.9BaxSr0.08-xLa0.02)(Zr0.45Sn0.55)0.995O3 (x = 0.02, 0.04, 0.06) were prepared with the conventional solid-state reaction method. The co-doping of Ba and Sr did not change the general shape of the hysteresis loops of lead lanthanum zirconate stannate (PLZS) antiferroelectric ceramics, but only changed the transition electric field and breakdown field strength of the antiferroelectric ceramics. With the increase of Ba content, the switching field increases first and then decreases, the recoverable energy storage density (Wre) of (Pb0.9Ba0.04Sr0.04La0.02)(Zr0.45Sn0.55)0.995O3 ceramics reaches the maximum, which is 7.01 J/ cm3, and the energy storage efficiency is 89.9%. When the electric field intensity increases from 5 kV/mm to 24 kV/mm, (Pb0.9Ba0.04Sr0.04La0.02)(Zr0.45Sn0.55)0.995O3 shows better discharge performance. The first peak current also increases from 16.4 A to 121.6 A, and the period increases from 80 ns to 129 ns. As a result, the excellent discharge characteristics indicate its potential as the material for energy storage devices and pulsed capacitors.