Type

Journal Article

Authors

Georg Duesberg
Valeria Nicolosi
Sonia Jaśkaniec
Tanja Stimpel-Lindner
Aideen Griffin
Beata Szydlowska
Victor Vega-Mayoral
Damien Hanlon
Ruiyuan Tian
Andrew Harvey
and 2 others

Subjects

Physics

Topics
energy storage optical properties lithium ion batteries nanosheets lithium ion battery exfoliated nanosheets battery anodes molybdenum dioxide moo2

Liquid phase exfoliation of MoO2 nanosheets for lithium ion battery applications (2019)

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.
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Full list of authors on original publication

Georg Duesberg, Valeria Nicolosi, Sonia Jaśkaniec, Tanja Stimpel-Lindner, Aideen Griffin, Beata Szydlowska, Victor Vega-Mayoral, Damien Hanlon, Ruiyuan Tian, Andrew Harvey and 2 others

Experts in our system

1
Georg Duesberg
Trinity College Dublin
Total Publications: 116
 
2
Valeria Nicolosi
Trinity College Dublin
Total Publications: 67
 
3
Sonia Jaśkaniec
Trinity College Dublin
Total Publications: 3
 
4
Victor Vega-Mayoral
Trinity College Dublin
Total Publications: 3
 
5
Damien Hanlon
Trinity College Dublin
Total Publications: 13
 
6
Ruiyuan Tian
Trinity College Dublin
Total Publications: 4
 
7
Andrew Harvey
Trinity College Dublin
Total Publications: 17