Asset Details
Do you wish to reserve the book?
Reversible superdense ordering of lithium between two graphene sheets
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Reversible superdense ordering of lithium between two graphene sheets
Do you wish to request the book?
Reversible superdense ordering of lithium between two graphene sheets
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Reversible superdense ordering of lithium between two graphene sheets
2018
Overview
Many carbon allotropes can act as host materials for reversible lithium uptake
1
,
2
, thereby laying the foundations for existing and future electrochemical energy storage. However, insight into how lithium is arranged within these hosts is difficult to obtain from a working system. For example, the use of in situ transmission electron microscopy
3
–
5
to probe light elements (especially lithium)
6
,
7
is severely hampered by their low scattering cross-section for impinging electrons and their susceptibility to knock-on damage
8
. Here we study the reversible intercalation of lithium into bilayer graphene by in situ low-voltage transmission electron microscopy, using both spherical and chromatic aberration correction
9
to enhance contrast and resolution to the required levels. The microscopy is supported by electron energy-loss spectroscopy and density functional theory calculations. On their remote insertion from an electrochemical cell covering one end of the long but narrow bilayer, we observe lithium atoms to assume multi-layered close-packed order between the two carbon sheets. The lithium storage capacity associated with this superdense phase far exceeds that expected from formation of LiC
6
, which is the densest configuration known under normal conditions for lithium intercalation within bulk graphitic carbon
10
. Our findings thus point to the possible existence of distinct storage arrangements of ions in two-dimensional layered materials as compared to their bulk parent compounds.
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.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
