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Citation:McNulty, D., Buckley, D. N. and O'Dwyer, C. (2015) 'Vanadium Oxide Polycrystalline Nanorods and Ion-Exchanged Nanotubes for Enhanced Lithium Intercalation', ECS Transactions, 64(22), pp. 1-12. doi: 10.1149/06422.0001ecst
In this work we investigate two alternative methods to remove amine molecules from as-synthesized vanadium oxide nanotubes (VONTs). Thermal treatment results in the formation of polycrystalline nanorods (poly-NRs) and ion exchange reactions with NaCl result in the formation of Na-VONTs. The removal of amine molecules is confirmed by monitoring the inorganic and organic phase changes and decomposition, respectively, using electron microscopy, IR spectroscopy and X-ray diffraction analyses. We compare the electrochemical performance of as-synthesized VONTs, poly-NRs and Na-VONTs. This work demonstrates that the presence of amine molecules within the layers of vanadium oxide impedes the intercalation of lithium ions, and that their removal results in a significant improvement in electrochemical characteristics. Out of the three vanadium oxide nanostructures investigated, poly- NRs exhibit the most promising results for practical use as a cathode material.
Wang, Kaixue; Li, Zhonglai; Wang, Yonggang; Li, Haimei; Chen, Jiesheng; Holmes, Justin D.(Royal Society of Chemistry (RSC), 2010-09-24)
Carbon nanocages with a nanographene shell have been prepared by catalytic decomposition of p-xylene on a MgO supported Co and Mo catalyst in supercritical CO2 at a pressure of 10.34 MPa and temperatures ranging from 650 ...
McNulty, David; Geaney, Hugh; Armstrong, Eileen; O'Dwyer, Colm(Royal Society of Chemistry (RSC), 2016-02-12)
Structured porous materials have provided several breakthroughs that have facilitated high rate capability, better capacity retention and material stability in Li-ion batteries. However, most advances have been limited to ...
Osiak, Michal J.; Geany, Hugh; Armstrong, Eileen; O'Dwyer, Colm(Royal Society of Chemistry (RSC), 2014-03-04)
This review outlines the developments in the structure, composition, size, and shape control of many important and emerging Li-ion battery materials on many length scales, and details very recent investigations on how the ...
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