Yttrium incorporated BiFeO3 nanostructures growth on two step anodized Al2O3 porous template for energy storage applications

ur-rehman, Attiq; Ashraf, M.; Shaikh, Hamid; Alhamidi, Abdullah; Ramay, Shahid M.; Saleem, Murtaza

doi:10.1016/j.ceramint.2019.11.270

Cited by 7 publications

(1 citation statement)

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“…We demonstrate here yet another important phenomenon occurring in nanolayer capacitors: the dielectric layer can be asymmetrically charged so that the amount of charge stored inside the dielectric can be many times higher than the charge accumulated on the capacitor plates. One of the most suitable, easily accessible, and actively researched materials for the dielectric layer of nanolayer capacitors is the aluminum oxide, which can be deposited using commercial atomic layer deposition machines [14][15][16]. This dielectric compound (Al 2 O 3 ) typically exhibits low leakage currents, which is an important advantage in energy storage applications [13,17,18].…”

Section: Introductionmentioning

confidence: 99%

Giant energy storage effect in nanolayer capacitors charged by the field emission tunneling

Ilin¹,

Burkova²,

Colla³

et al. 2021

Nanotechnology

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We fabricate nanolayer alumina capacitor and apply high electric fields, close to 1 GV m−1, to inject charges in the dielectric. Asymmetric charge distributions have been achieved due to the selectivity of the quantum tunneling process. Namely, the electrons near the Fermi level cannot tunnel intoregions near the cathode, where the total energy would be less than the potential energy. This mechanism exhibits a strong tendency to populate charge traps located near the anode, i.e. the regions where their potential energy is the lowest. Such spatially selective charging of the dielectric allows a permanent bulk charge storage in the dielectric layer, even if the capacitor plates are short-circuited, provided that the temperature is sufficiently low so that the conductivity of the dielectric is negligible. The stored charge can be recovered if the temperature is increased above ~250 K for the dielectric tested, i.e. Al2O3. In our experiments, the total charge stored in the dielectric was up to seven and a half times higher than the charge stored on the capacitor plates. Also, measurements of the breakdown voltage show that the breakdown electric field, i.e. the dielectric strength, is independent of the thickness of the dielectric.

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Section: Introductionmentioning

confidence: 99%

Giant energy storage effect in nanolayer capacitors charged by the field emission tunneling

Ilin¹,

Burkova²,

Colla³

et al. 2021

Nanotechnology

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Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

Mhamad

Aziz

et al. 2020

ChemistrySelect

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Pure phase bismuth ferrite has been successfully prepared in this research using a modified method of sol-gel auto-ignition. This method is a fast and economical synthesis technique since it can produce fine as-synthesis powder for less than 4 hours. Also, the influences of diverse chelating agents on the physicochemical properties of the synthesized samples were examined using various characterization techniques. XRD revealed that pure bismuth ferrite nanoparticles with rhombohedral perovskite structure were produced by using ascorbic acid (AA) as a chelating agent. From the UV spectra, a blue shift observed in the presence of AA and citric acid (CA). Moreover, the specific surface area of the as-prepared BFO-EDTA, BFO-AA and BFO-CA samples was 1.694, 1.134 and 1.627 m 2 /g, respectively, consistent with the XRD findings. Raman analysis shows that the synthesized BFO samples exhibit 4 A1 and 8E modes confirming Rhombohedral R3c geometry of bismuth ferrite nanoparticles. Finally, FTIR spectra depicted three absorption peaks at 410, 450, and 548 cm À 1 corresponding to FeÀ O stretching and bending, respectively, which is a characteristic of FeO 6 octahedral in perovskite. The findings of this study would assist the researcher in the selection of chelating agents in the auto-combustion method for the processing of nanoparticles for particular applications.

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Experimental and Theoretical Study of Porous Al2O3

Parhizgar

Taheriniya

Beheshtian

2021

Trans Indian Inst Met

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Yttrium incorporated BiFeO3 nanostructures growth on two step anodized Al2O3 porous template for energy storage applications

Cited by 7 publications

References 50 publications

Giant energy storage effect in nanolayer capacitors charged by the field emission tunneling

Giant energy storage effect in nanolayer capacitors charged by the field emission tunneling

Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

Experimental and Theoretical Study of Porous Al2O3

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