Abstract
Dielectric capacitors have been widely studied because their electrostatic storage capacity is enormous, and they can deliver the stored energy in a very short time. Relaxor ferroelectrics-based dielectric capacitors have gained tremendous importance for the efficient storage of electrical energy. Relaxor ferroelectrics possess low dielectric loss, low remanent polarization, high saturation polarization, and high breakdown strength, which are the main parameters for energy storage. This article focuses on a timely review of the energy storage performance of BiFeO3-based relaxor ferroelectrics in bulk ceramics, multilayers, and thin film forms. The article begins with a general introduction to various energy storage systems and the need for dielectric capacitors as energy storage devices. This is followed by a brief discussion on the mechanism of energy storage in capacitors, ferroelectrics, anti-ferroelectrics, and relaxor ferroelectrics as potential candidates for energy storage. The remainder of this article is devoted to reviewing the energy storage performance of bulk ceramics, multilayers, and thin films of BiFeO3-based relaxor ferroelectrics, along with a discussion of strategies to address some of the issues associated with their application as energy storage systems.
Highlights
Global warming poses potential threats to the planet Earth’s future
BiFeO3-BaTiO3 and BiFeO3SrTiO3, with their compositional ratios lying in the morphotropic phase boundary, are the two most widely studied BiFeO3-based binary solid solutions for high-energy-density storage
The nanodomain-engineered bulk ceramic 0.57BiFeO30.33BaTiO3-0.1NaNbO3 with the addition of 0.1 wt% MnO2 and 2 wt% BaCu(B2O5) featured a similar value of Urec (~ 8.12 J cm−3); it had a higher value of η ~ 90%
Summary
Global warming poses potential threats to the planet Earth’s future. The continuous burning of fossil fuels has increased the concentration of CO2 and other greenhouse gases in the Earth’s atmosphere, leading to a warmer atmosphere and climate change. The current review discusses the recent progress on the development of high-energy storage dielectric capacitors based on the relaxor ferroelectric (RFE) of BiFeO3. This motivates the scientific community to turn their heads towards the RFEs in search of high-energy storage capacitors. Ceramic dielectric capacitors based on BiFeO3 have recently gained interest in the field of energy storage applications because of the high polarization (~90 μC cm−2) predicted in BiFeO3, along with its high ferroelectric Curie temperature (TC) (~830 ◦C) [16]. We present a review of the recent progress on BiFeO3-based relaxor ferroelectric for energy storage, discussing various issues to meet practical applications. We present the recent progress in energy storage studies on BiFeO3 and strategies for further enhancement
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