Ultrafast lithium diffusion in bilayer graphene.

@article{Khne2017UltrafastLD,
  title={Ultrafast lithium diffusion in bilayer graphene.},
  author={Matthias K{\"u}hne and Federico Paolucci and Jelena Popovic and Pavel M. Ostrovsky and Joachim Maier and Jurgen H. Smet},
  journal={Nature nanotechnology},
  year={2017},
  volume={12 9},
  pages={
          895-900
        }
}
Solids that simultaneously conduct electrons and ions are key elements for the mass transfer and storage required in battery electrodes. Single-phase materials with a high electronic and high ionic conductivity at room temperature are hard to come by, and therefore multiphase systems with separate ion and electron channels have been put forward instead. Here we report on bilayer graphene as a single-phase mixed conductor that demonstrates Li diffusion faster than in graphite and even surpassing… 

Device level reversible potassium intercalation into bilayer graphene

Electrochemical intercalation and storage of alkali metal ions into the graphite interlayer space is a key ingredient for commercial rechargeable ion batteries. While this has been exceptionally

Ultrahigh ion diffusion in oxide crystal by engineering the interfacial transporter channels

The mass storage and removal in solid conductors always played vital role on the technological applications such as modern batteries, permeation membranes and neuronal computations, which were

Ultrafast Li+ Diffusion Kinetics of 2D Oxidized Phosphorus for Quasi-Solid-State Bendable Batteries with Exceptional Energy Densities

Phosphorus has drawn much attention for energy storage applications due to its high theoretical capacity while its surface is prone to oxidization, causing alterations of its physicochemical

Adsorption and ultrafast diffusion of lithium in bilayer graphene: Ab initio and kinetic Monte Carlo simulation study

In this work, we adopt first-principle calculations based on density functional theory and Kinetic Monte Carlo simulations to investigate the adsorption and diffusion of lithium in bilayer graphene

Lithium intercalation into bilayer graphene

It is clarified that lithium atoms can be stored only in the graphene interlayer and the first ever planar lithium-intercalation model for graphenic carbons is proposed, which will guide the development of graphene materials in lithium ion batteries.

Kinetic Ionic Permeation and Interfacial Doping of Supported Graphene

Terahertz spectroscopy is employed as a contact-free means to investigate the impact of ubiquitous cations in aqueous solution on the electronic properties of SiO2-supported graphene and shows that the ion-induced Fermi level shift of graphene involves cationic permeation through graphene.

Reversible superdense ordering of lithium between two graphene sheets

Using a double-aberration-corrected transmission electron microscope, intercalation of lithium between two graphene sheets is found to produce a dense, multilayer lithium phase, rather than the expected single layer.

Ultrafast Lithium Diffusion in Bilayer Buckled Graphene: A Comparative Study of Li and Na

The effect of the curvature of bilayer graphene on the interlayer diffusion of Li atoms is investigated using molecular dynamics simulations. A spectacular enhancement of the diffusion constant

Atomic-scale ion transistor with ultrahigh diffusivity

In situ optical measurements suggest that ultrafast ion transport likely originates from highly dense packing of ions and their concerted movement inside the graphene channels, and shows a threshold behavior due to the critical energy barrier for hydrated ion insertion.
...

References

SHOWING 1-10 OF 62 REFERENCES

Synergistic, ultrafast mass storage and removal in artificial mixed conductors

It is shown, using electrochemical and chemical methods, that a melt-processed composite of the ‘super-ionic’ conductor RbAg4I5 and the electronic conductor graphite exhibits both a remarkable silver excess and a silver deficiency, similar to those found in single-phase mixed conductors, even though such behaviour is not possible in the individual phases.

Impedance Study on the Electrochemical Lithium Intercalation into Natural Graphite Powder

Electrochemical lithium intercalation into natural graphite powder of different sizes was studied by alternating current impedance spectroscopy. Impedance spectra at various potentials were fitted

Rapid Atomic Li Surface Diffusion and Intercalation on Graphite: A Surface Science Study

The diffusion of dilute metallic lithium across the surface and into the bulk of atomically clean highly oriented pyrolytic graphite in ultrahigh vacuum is reported. Auger electron spectroscopy and a

A high-mobility electronic system at an electrolyte-gated oxide surface

This work demonstrates that limitations of electrolyte gating can be overcome by protecting the sample with a chemically inert, atomically smooth sheet of hexagonal boron nitride, which should enable future studies where high carrier density modulation is required but electrochemical reactions and surface disorder must be minimized.

Temperature Dependence of Electric Transport in Few-layer Graphene under Large Charge Doping Induced by Electrochemical Gating

The temperature dependence of electric transport properties of single-layer and few-layer graphene at large charge doping is of great interest both for the study of the scattering processes

Li Intercalation in MoS2: In Situ Observation of Its Dynamics and Tuning Optical and Electrical Properties.

Two-dimensional layered materials like MoS2 have shown promise for nanoelectronics and energy storage, both as monolayers and as bulk van der Waals crystals with tunable properties by electrochemically inserting a foreign species (Li(+) ions) into their interlayer spacing.

Suppression of Metal-Insulator Transition in VO2 by Electric Field–Induced Oxygen Vacancy Formation

It is found that electrolyte gating of epitaxial thin films of VO2 suppresses the metal-to-insulator transition and stabilizes the metallic phase to temperatures below 5 kelvin, even after the ionic liquid is completely removed.

Mechanism for the large conductance modulation in electrolyte-gated thin gold films

Electrolyte gating using ionic liquid electrolytes has recently generated considerable interest as a method to achieve large carrier density modulations in a variety of materials. In noble metal thin

Disorder engineering and conductivity dome in ReS2 with electrolyte gating

Theoretical calculations and a transport model indicate that the observed conductivity suppression can be explained by a combination of a narrow conduction band and Anderson localization due to electrolyte-induced disorder.

Diffusion Coefficients of Lithium Ions during Intercalation into Graphite Derived from the Simultaneous Measurements and Modeling of Electrochemical Impedance and Potentiostatic Intermittent Titration Characteristics of Thin Graphite Electrodes

The solid state diffusion of lithium into graphite during electrochemical intercalation processes was investigated using potentiostatic intermittent titration (PITT) and impedance spectroscopy (EIS).
...