Liquid phase exfoliation of MoO<inf>2</inf> nanosheets for lithium ion battery applications
File Type:
PDFItem Type:
Journal ArticleDate:
2019Access:
openAccessCitation:
Boland, J.B. and Harvey, A. and Tian, R. and Hanlon, D. and Vega-Mayoral, V. and Szydlowska, B. and Griffin, A. and Stimpel-Lindner, T. and Jaskaniec, S. and Nicolosi, V. and Duesberg, G. and Coleman, J.N., Liquid phase exfoliation of MoO<inf>2</inf> nanosheets for lithium ion battery applications, Nanoscale Advances, 1, 4, 2019, 1560-1570Download Item:
Abstract:
Molybdenum dioxide (MoO2) is a layered material which shows promise for a number of applications in the electrochemical energy storage arena. Mostly studied as a bulk layered material, MoO2 has not previously been exfoliated in large quantities. Here we demonstrate the liquid phase exfoliation of MoO2 in the solvent isopropanol, yielding reasonable amounts of good quality nanosheets. However, we found that, when dispersed in isopropanol under ambient conditions, MoO2 nanosheets are gradually oxidized to higher oxides such as MoO3 over a period of days. Conversely, if the nanosheets are processed into dried films immediately after exfoliation, and before oxidation has had a chance to progress, the nanosheets are relatively stable under ambient conditions, remaining unoxidised unless the films are heated. We also found that MoO2 nanosheets can be size selected by controlled centrifugation and show size-dependent optical properties. This allows us to propose spectroscopic metrics which allow concentration- and size-estimation from extinction spectra. Finally, we found that liquid-exfoliated MoO2 nanosheets could be used to produce lithium ion battery anodes with capacities of up to 1140 mA h g−1.
URI:
https://pubs.rsc.org/en/content/articlelanding/2019/NA/C8NA00241J#!divAbstracthttp://hdl.handle.net/2262/91317
Sponsor
Grant Number
Science Foundation Ireland (SFI)
SFI/12/RC/2278
Author's Homepage:
http://people.tcd.ie/colemajhttp://people.tcd.ie/duesberg
http://people.tcd.ie/nicolov
Description:
PUBLISHEDcited By 3
Type of material:
Journal ArticleURI:
https://pubs.rsc.org/en/content/articlelanding/2019/NA/C8NA00241J#!divAbstracthttp://hdl.handle.net/2262/91317
Collections
Series/Report no:
Nanoscale Advances1
4
Availability:
Full text availableKeywords:
Molybdenum dioxide (MoO2), Nanosheets, Lithium ion batteriesDOI:
http://dx.doi.org/10.1039/c8na00241jMetadata
Show full item recordLicences: