BaTiO₃–BiYbO₃perovskite materials for energy storage applications

Abstract

Novel perovskite-type of (1-x)BaTiO 3 -xBiYbO 3 solid solutions with x = 0.00 ~ 0.20 were synthesized by conventional solid-state reaction methods. A systematic structural change from the ferroelectric tetragonal to pseudo-cubic phase was observed at about x = 0.050 ~ 0.051 at room temperature. Dielectric measurements revealed a gradual change from normal ferroelectric behavior to highly diffusive and dispersive relaxor-like characteristics, where the phase transition temperature shifted to higher temperature with increasing frequency. With the increase of BiYbO 3 content, the nonlinearity of the (1-x)BaTiO 3 -xBiYbO 3 ceramic was weakened obviously. The bulk ceramics were characterized by high polarization maxima and low remnant polarization, exhibiting slim P-E hysteresis loops. The results demonstrated that the (1-x)BaTiO 3 -xBiYbO 3 ceramics were promising lead-free relaxor materials for energy storage application.Recently, lead-free relaxor ferroelectrics have received dramatic attention because of toxicity of lead. Researchers find that Bi 3+ ion is a promising alternative to Pb 2+ ion due to their similar lone pair electronic 6s 2 configuration. 17 The Bi 2 O 3 -doped BaTiO 3 materials are characterized to exhibit both ferroelectric and relaxor properties depending on the composition.

Giant energy density and high efficiency achieved in bismuth ferrite-based film capacitors via domain engineering

“…The temperature-dependent dielectric spectroscopies of the BFSTO films exhibit broadened dielectric peaks and frequency dispersion (Supplementary Fig. 4), further evidencing the RFE characteristics 14 .…”

“…First, the spontaneous polarization P s of BTO is only 26 μC cm −2 , much lower than that of PbTiO 3 (~80 μC cm −2 ) 13 . Second, as BTO-based RFEs bears low Curie temperatures T c (<100 °C), the deterioration of their ferroelectricity and energy storage performance can be evident at elevated temperatures 14,15 . To address these problems, we focus on a new lead-free system, namely, BiFeO 3 (BFO), which has been acknowledged to be a promising alternative of lead-based dielectrics/ferroelectrics with a large P s of ~100 μC cm −2 and a high T c of 830 °C 16 .…”

Synthesis and Characterizations of Novel Ca-Mg-Ti-Fe-Oxides Based Ceramic Nanocrystals and Flexible Film of Polydimethylsiloxane Composite with Improved Mechanical and Dielectric Properties for Sensors

“…The ε′ gradually increases with increasing of sintering temperature from 25 to 1050 °C. The ε′ values are also significantly higher than other perovskite composites [13]. At the interface of semiconducting grain and insulating grain boundary, the charge carriers are accumulated and possessed an increase in dielectric constant [4].…”

“…They are basically perovskite M 2+ TiO 3 in structure, and face-centered cubic (FCC) (if M = Ca, Ba, and Sr) or trigonal (if M = Fe, Co, Ni, Mn, and Mg), depending on chemical composition [11,12]. Lead (Pb) free perovskite materials have been investigated to be used in many energy storage applications [13,14]. The perovskite calcium titanate (orthorhombic or monoclinic CaTiO 3 ) and geikeilite magnesium titanate (rhombohedral MgTiO 3 ) are being used as attractive materials in many ceramic coating industries [15,16].…”

Enhanced energy storage density by inducing defect dipoles in lead free relaxor ferroelectric BaTiO3-based ceramics

“…So, there are two possible routes to improve the energy-storage density of AFE and FE ceramics for energy storage applications: One is to enhance the BDS for high E and another is to increase the limit of integration by enlarging the difference between the P max and P r . For the first route, it was found that AFE ceramic ( [17][18][19][20][21] It indicated that partial occupancy of Bi 3þ at the A site of the perovskite compound could effectively improve the energy storage properties. As a promising candidate system, relaxor ferroelectrics BaTiO 3 (BT)-based ceramics play a key role in the area of energy density capacitors because of their low P max , high P r , and low loss.…”