Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

Abstract

Energy storage capacitors with high recoverable energy density and efficiency are greatly desired in pulse power system. In this study, the energy density and efficiency were enhanced in Mn‐modified (Pb0.93Ba0.04La0.02)(Zr0.65Sn0.3Ti0.05)O3 antiferroelectric ceramics via a conventional solid‐state reaction process. The improvement was attributed to the change in the antiferroelectric‐to‐ferroelectric phase transition electric field (EF) and the ferroelectric‐to‐antiferroelectric phase transition electric field (EA) with a small Mn addition. Mn ions as acceptors, which gave rise to the structure variation, significantly influenced the microstructures, dielectric properties and energy storage performance of the antiferroelectric ceramics. A maximum recoverable energy density of 2.64 J/cm3 with an efficiency of 73% was achieved when x = 0.005, which was 40% higher than that (1.84 J/cm3, 68%) of the pure ceramic counterparts. The results demonstrate that the acceptor modification is an effective way to improve the energy storage density and efficiency of antiferroelectric ceramics by inducing a structure variation and the (Pb0.93Ba0.04La0.02)(Zr0.65Sn0.3Ti0.05)O3‐xMn2O3 antiferroelectric ceramics are a promising energy storage material with high‐power density.

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

“… 3 , 126 Furthermore, doping with Ba and Sr (A-site) improves fatigue behavior and temperature stability, suppresses the stress sensitivity, and enhances energy storage. 148 , 150 − 153 , 155 , 161 , 173…”

“…To further optimize the energy storage properties of PLZT ceramics, Sn may be substituted on the B-site of PLZT, which broadens the AFE compositional range, ,,,,,− in accordance with phase diagram from 1989 (Figure ). (Pb 0.97 La 0.02 )­(Zr,Sn,Ti)­O 3 with 2 mol % La has been most commonly studied in which the Zr/Ti/Sn ratio is varied to give a complex phase diagram that contains FE tetragonal (F T ), high-temperature nontilted FE rhombohedral (F R(HT) ), low temperature FE rhombohedral (F R(LT) ) AFE tetragonal (A T ), and AFE orthorhombic (A O ) phases.…”

Achieving ultrahigh energy-storage capability in PbZrO3-based antiferroelectric capacitors based on optimization of property parameters

“…In the range of wavenumbers of <100 cm À1 , the peak width broadened obviously with increasing Sr 2+ content, which is mainly ascribed to the chemical cation disorder. 35 In addition, the peaks exhibit a tiny shi with the increase of Sr 2+ content, which can be conrmed from the peaks at 125, 250 and 280 cm À1 , indicating the entrance of ionic Sr 2+ into the lattice. 45 These phenomena are in good agreement with previous studies, demonstrating that Sr 2+ doping is likely to disorder the local structure and disperse the phase transition between AFE and FE.…”

“…For instance, Liu et al found that the AFE-FE phase transition (E F ) and AFE-FE phase transition eld (E A ) of Mn-doped (Pb 0.87 Ba 0.1 La 0.02 ) (Zr 0.65 Sn 0.3 Ti 0.05 )O 3 ceramics increased from 11.9 to 12.8 kV mm À1 and from 7.6 to 9.3 kV mm À1 , respectively, realizing a W rec of 2.64 J cm À3 . 35 Similarly, Sr was introduced to the A-site of (Pb 0.97 La 0.02 )(Zr 0.75 Sn 0.195 -Ti 0.055 )O 3 , which exhibited a high W rec of 5.56 J cm À3 due to the strengthened E F and E A . 36 On the other hand, breakdown strength (BDS) also plays a pivotal role in increasing energy density.…”

Konjac glucomannan-templated synthesis of three-dimensional NiO nanostructures assembled from porous NiO nanoplates for gas sensors

“…19 Some natural templates have been used to design NiO-based porous nanostructures such as nanocrystalline cellulose, 20 eggshell membrane, 21 lotus pollen grains, 22 guar gum, 23 starch, 24 and pinewood. 25 However, to the best of our knowledge, there have seldom been reports of using natural KGM as a sacricial support for designing highly porous NiO nanostructures in today's literature. Here, we report a novel synthetic route to 3D NiO nanostructures using biotemplating KGM nanobrils and their gas sensing characteristics were systematically investigated.…”