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Effect of zwitterion on the lithium solid electrolyte interphase in ionic liquid electrolytes
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Byrne, N., Howlett, P. C., MacFarlane, Douglas (Douglas R.), Smith, Mark E., Howes, Andrew P., Hollenkamp, A. F., Bastow, T., Hale, P. and Forsyth, Maria (2008) Effect of zwitterion on the lithium solid electrolyte interphase in ionic liquid electrolytes. Journal of Power Sources, Vol.184 (No.1). pp. 288-296. doi:10.1016/j.jpowsour.2008.04.094 ISSN 0378-7753.
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Official URL: http://dx.doi.org/10.1016/j.jpowsour.2008.04.094
Abstract
An understanding of the solid electrolyte interphase (SEI) that forms on the lithium-metal surface is essential to the further development of rechargeable lithium-metal batteries. Currently, the formation of dendrites during cycling, which can lead to catastrophic failure of the cell, has mostly halted research on these power sources. The discovery of ionic liquids as electrolytes has rekindled the possibility of safe, rechargeable, lithium-metal batteries. The current limitation of ionic liquid electrolytes, however, is that when compared with conventional non-aqueous electrolytes the device rate capability is limited. Recently, we have shown that the addition of a zwitterion such as N-methyl-N-(butyl sulfonate) pyrrolidinium resulted in enhancement of the achievable current densities by 100%. It was also found that the resistance of the SEI layer in the presence of a zwitterion is 50% lower. In this study, a detailed chemical and electrochemical analysis of the SEI that forms in both the presence and absence of a zwitterion has been conducted. Clear differences in the chemical nature and also the thickness of the SEI are observed and these may account for the enhancement of operating current densities. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Nuclear magnetic resonance, Lithium cells, Electrolytes -- Conductivity, Electrochemistry, Ionic solutions | ||||
| Journal or Publication Title: | Journal of Power Sources | ||||
| Publisher: | Elsevier S.A. | ||||
| ISSN: | 0378-7753 | ||||
| Official Date: | 15 September 2008 | ||||
| Dates: |
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| Volume: | Vol.184 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 9 | ||||
| Page Range: | pp. 288-296 | ||||
| DOI: | 10.1016/j.jpowsour.2008.04.094 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Funder: | Australian Research Council (ARC) |
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