Lead-free epitaxial ferroelectric heterostructures for energy storage applications

Sharma, Amrit P.; Pradhan, Dhiren K.; Xiao, Bo; Pradhan, Sangram K.; Bahoura, M.

doi:10.1063/1.5046089

Cited by 10 publications

(7 citation statements)

References 22 publications

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“…At lower frequencies, the dielectric constant is high, which is due to the presence of most of polarization dynamics. The dielectric permittivity of these nanostructures is found to be ~ 1000 at 1 kHz, which is smaller compared to similar materials in the literature 18,28,29 . Such a low dielectric constant is crucial for the improvement of the figure of merit of the pyroelectric device.…”

Section: Dielectric Properties Of Bzt/bct Heterostructures Dielectricontrasting

confidence: 53%

“…Thin film fabrication. We prepared the BCT and BZT ceramic targets by a high-temperature solid-state reaction method following the procedures reported in our previous work 18 . Those targets are sintered at a high temperature, 1400 °C, for 6 h and utilized them for the growth of the BZT/BCT thin film structures by PLD technique, which uses a KrF excimer laser with energy density ~ 2 J/cm 2 and wavelength λ ~ 248 nm.…”

Section: Methodsmentioning

confidence: 99%

“…While BaTiO 3 is one of the most popular lead-free ferroelectric materials, its ferroelectric, dielectric, piezoelectric, and pyroelectric properties are lower than the lead-based ferroelectrics. Previous research showed the enhancement of these properties by suitable site modification at both sites in BTO solid solutions BaZr 0.2 Ti 0.8 O 3 (BZT), Ba 0.7 Ca 0.3 TiO 3 (BCT), and BaZr 0.2 Ti 0.8 O 3 -Ba 0.7 Ca 0.3 TiO 3 -(BZT-BCT) for different applications in multifunctional devices [18][19][20] . Recently, Patel et al 15 reported a high thermomechanical energy conversion density on lead-free BZT-BCT bulk ceramics.…”

mentioning

confidence: 99%

“…In this study, we present our efforts to improve the performance of relaxor-ferroelectric thin-film heterostructures (BCT/BZT) for low-grade waste-heat conversion. Our previous study 18,21 demonstrated that relaxorferroelectric heterostructures showed larger energy density, owing to their high breakdown strength, large polarization, and low remnant polarization. Nevertheless, to the best of our knowledge, this study is the first attempt to recover low-grade waste-heat using lead-free relaxor-ferroelectric based on multilayer structures.…”

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confidence: 99%

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Lead-free relaxor-ferroelectric thin films for energy harvesting from low-grade waste-heat

Sharma

Behera

Pradhan

et al. 2021

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One of the ways to mitigate the world energy crisis is to harvest clean and green energy from waste-heat, which is abundant, ubiquitous, and free. Energy harvesting of this waste-heat is one of the most encouraging methods to capture freely accessible electrical energy. Ferroelectric materials can be used to harvest energy for low power electronic devices, as they exhibit switchable polarization, excellent piezoelectric and pyroelectric properties. The most important characteristic of ferroelectric materials, in the context of energy harvesting, is their ability to generate electric power from a time-dependent temperature change. In this work, we grew highly c-axis oriented heterostructures of BaZr0.2Ti0.8O3 (barium zirconium titanate, BZT)/Ba0.7Ca0.3TiO3 (barium calcium titanate, BCT) on SrRuO3 (strontium ruthenate, SRO) and deposited on SrTiO3 (strontium titanate, STO) single crystalline substrate using pulsed laser deposition (PLD) technique. We investigated the structural, electrical, dielectric, and pyroelectric properties of the above-mentioned fabricated heterostructures. The wide range of θ–2θ X-ray diffraction (XRD) patterns only shows (00l) reflection peaks of heterostructures and the substrate which confirmed that the films are highly c-axis oriented. We are also capable to convert the low-grade waste-heat into electrical energy by measuring various temperature-dependent ferroelectric hysteresis loops of our nanostructure films via pyroelectric Ericsson cycles and the structures show an energy conversion density ~ 10,970 kJ/m3 per cycle. These devices exhibit a large pyroelectric current density of ~ 25 mA/m2 with 11.8 °C of temperature fluctuation and the corresponding pyroelectric coefficient of 3425 μC/m2K. Our research findings suggest that these lead-free relaxor-ferroelectric heterostructures might be the potential candidates to harvest electrical energy from waste low-grade thermal energy.

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Section: Dielectric Properties Of Bzt/bct Heterostructures Dielectricontrasting

confidence: 53%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Lead-free relaxor-ferroelectric thin films for energy harvesting from low-grade waste-heat

Sharma

Behera

Pradhan

et al. 2021

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“…ABO 3 -type perovskites also possess the ability of rapid faradaic redox reaction at their surface, which enables them to be potential candidates for supercapacitor electrodes. 18,19 Moreover, ABO 3 -type perovskites with lanthanide or alkaline-earth elements as A and transition metals as B atom have intrinsic oxygen vacancies, which enable them to act as electrode material for supercapacitors via faradic redox reaction. Pseudocapacitive charge storage mechanism involves mainly three processes: (a) adsorption of electrolyte ions to form a monolayer over metal or metal oxide surface, known as underpotential deposition, (b) fast reversible redox reaction at the electrode surface, and (c) fast intercalation/deintercalation of electrolyte ions into bulk electrode.…”

Section: Introductionmentioning

confidence: 99%

Performance of asymmetric supercapacitor fabricated with perovskite‐type Sr ²⁺ ‐incorporated LaMnO ₃ (La _0. ₇ Sr ₀ _. ₃ MnO ₃ ) n

et al. 2021

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Strontium (Sr) incorporated LaMnO 3 (La 0.7 Sr 0.3 MnO 3 ) nanoparticles have been synthesized by ball-milling-assisted solid-state reaction to study their performance as electrode material for energy storage applications. The La 0.7 Sr 0.3 MnO 3 nanoparticles exhibit superior electrochemical performance in neutral aqueous electrolyte (1 M Na 2 SO 4 ) in comparison to LaMnO 3 and SrMnO 3 nanoparticles. This neutral electrolyte provides relatively higher ionic conductivity and viscosity compared to the ionic liquids and a wider potential window compared to the alkaline electrolytes. Electrochemical study of the electrodes prepared using La 0.7 Sr 0.3 MnO 3 nanoparticles reveals pseudocapacitive behaviors with fast reversible Faradaic charge storage, which plays a key role in charge storage. The composite materials exhibit highest specific capacitance of 393.5 F g −1 at a scan rate of 2 mV s −1 . Asymmetric supercapacitors fabricated using La 0.7 Sr 0.3 MnO 3 nanoparticle and activated carbon operates over a wide potential window of 1.8 V, and it reveals high specific capacitance (197 F g −1 ) as well as high capacitive retention (87%) even after 4000 charge-discharge cycles.

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Recent Advances in Multilayer‐Structure Dielectrics for Energy Storage Application

et al. 2021

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An electrostatic capacitor has been widely used in many fields (such as high pulsed power technology, new energy vehicles, etc.) due to its ultrahigh discharge power density. Remarkable progress has been made over the past 10 years by doping ferroelectric ceramics into polymers because the dielectric constant is positively correlated with the energy storage density. However, this method often leads to an increase in dielectric loss and a decrease in energy storage efficiency. Therefore, the way of using a multilayer structure to improve the energy storage density of the dielectric has attracted the attention of researchers. Although research on energy storage properties using multilayer dielectric is just beginning, it shows the excellent effect and huge potential. In this review, the main physical mechanisms of polarization, breakdown and energy storage in multilayer structure dielectric are introduced, the theoretical simulation and experimental results are systematically summarized, and the preparation methods and design ideas of multilayer structure dielectrics are mainly described. This article covers not only an overview of the state-of-the-art advances of multilayer structure energy storage dielectric but also the prospects that may open another window to tune the electrical performance of the electrostatic capacitor via designing a multilayer structure.

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Lead-free epitaxial ferroelectric heterostructures for energy storage applications

Cited by 10 publications

References 22 publications

Lead-free relaxor-ferroelectric thin films for energy harvesting from low-grade waste-heat

Lead-free relaxor-ferroelectric thin films for energy harvesting from low-grade waste-heat

Performance of asymmetric supercapacitor fabricated with perovskite‐type Sr ²⁺ ‐incorporated LaMnO ₃ (La _0. ₇ Sr ₀ _. ₃ MnO ₃ ) n

Recent Advances in Multilayer‐Structure Dielectrics for Energy Storage Application

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Lead-free epitaxial ferroelectric heterostructures for energy storage applications

Cited by 10 publications

References 22 publications

Lead-free relaxor-ferroelectric thin films for energy harvesting from low-grade waste-heat

Lead-free relaxor-ferroelectric thin films for energy harvesting from low-grade waste-heat

Performance of asymmetric supercapacitor fabricated with perovskite‐type Sr 2+ ‐incorporated LaMnO 3 (La 0. 7 Sr 0 . 3 MnO 3 ) n

Recent Advances in Multilayer‐Structure Dielectrics for Energy Storage Application

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Performance of asymmetric supercapacitor fabricated with perovskite‐type Sr ²⁺ ‐incorporated LaMnO ₃ (La _0. ₇ Sr ₀ _. ₃ MnO ₃ ) n