Large energy storage efficiency of the dielectric layer of graphene nanocapacitors

  title={Large energy storage efficiency of the dielectric layer of graphene nanocapacitors},
  author={Alexey Bezryadin and Andrey Belkin and Eduard Ilin and M Pak and Eugene V. Colla and Alfred Wilhelm Hubler},
Electric capacitors are commonly used in electronic circuits for the short-term storage of small amounts of energy. It is desirable however to use capacitors to store much larger energy amounts to replace rechargeable batteries. Unfortunately existing capacitors cannot store sufficient energy to be able to replace common electrochemical energy storage systems. Here we examine the energy storage capabilities of graphene nanocapacitors, which are tri-layer devices involving an Al film, Al2O3… 

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

Asymmetric charge distributions have been achieved due to the selectivity of the quantum tunneling process, which 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 conductivities of theDielectric is negligible.

Coulomb barrier creation by means of electronic field emission in nanolayer capacitors.

This work shows that after the dielectric nanolayer of the capacitor is charged, the field emission and the hopping conductivity are both suppressed, and the hysteresis of the I-V curve disappears.

Reversed Photoeffect in Transparent Graphene Nanocapacitors

Electronic properties of ultrathin dielectric films consistently attract much attention since they play important roles in various electronic devices, such as field effect transistors and memory

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It is concluded that a short time of step II oxidation can produce purer and ultralarge GO sheets via self-exfoliation and the pure GO is possessed with better thermal stability and liquid crystal behavior.

Theoretical and Experimental Analysis of Energy in Charging a Capacitor by Step-Wise Potential

In this paper, charging capacitor in RC circuit, to a final voltage, via arbitrary number of steps, is investigated and analyzed both theoretically and experimentally. The obtained results show that

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In this paper, the one-dimensional (1D) Al2O3 nanofibers (Al2O3 NFs), CaCu3Ti4O12 nanofibers (CCTO NFs), and core–shell CaCu3Ti4O12@Al2O3 nanofibers (CCTO@Al2O3 NFs) were prepared via electrospinning

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The response of a dielectric to an applied oscillating or step function electric field is widely used to characterize the permittivity of materials from biological samples to integrated circuits. A



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The energy density and power density in nano vacuum tubes are large compared to lithium batteries and electrochemical capacitors and the capacitance is large at small gap sizes.

Boron nitride-graphene nanocapacitor and the origins of anomalous size-dependent increase of capacitance.

This work fabricates the thinnest possible nanocapacitor system, essentially consisting of only monolayer materials: h-BN with graphene electrodes, and finds a significant increase in capacitance below a thickness of ∼5 nm, more than 100% of what is predicted by classical electrostatics.

Nanoscale Dielectric Capacitors Composed of Graphene and Boron Nitride Layers: A First Principles Study of High-Capacitance at Nanoscale

We investigate a nanoscale dielectric capacitor model consisting of two-dimensional, hexagonal h-BN layers placed between two commensurate and metallic graphene layers using self-consistent field

An overview of the applications of graphene-based materials in supercapacitors.

Several key issues for improving the structure of graphene-based materials and for achieving better capacitor performance, along with the current outlook for the field are discussed.

Gap size dependence of the dielectric strength in nano vacuum gaps

  • D. LyonA. Hubler
  • Physics
    IEEE Transactions on Dielectrics and Electrical Insulation
  • 2013
We study the dielectric strength of vacuum gaps of under 100 nm. We find their dielectric strengths to have a power law dependence on the gap size. We apply this power law to find that the dielectric

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The integration of 2 D graphene nanosheets and layered transition-metal dichalcogenides has been recognized as one of the most extensive strategies for the synthesis of promising electrode materials

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We propose a model for planar nanoscale dielectric capacitor consisting of a single layer, insulating hexagonal boron nitride (BN) stripe placed between two metallic graphene stripes, all forming

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Heterostructures based on combining two-dimensional (2D) crystals in one stack have unusual physical properties and allow the creation of novel devices. Although this method of mechanically

Electronic Properties of Homo- and Heterobilayer Graphyne: The Idea of a Nanocapacitor

We have investigated the capacitive behavior of bilayer graphyne and its boron nitride derivatives by first-principles simulations based on density functional theory, including van der Waals