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On the role of cyclic unsaturated additives on the behaviour of lithium metal electrodes in ionic liquid electrolytes
journal contribution
posted on 2010-02-15, 00:00 authored by G Lane, A Best, D MacFarlane, Maria ForsythMaria Forsyth, A HollenkampThree cyclic vinyl based additives, based respectively on oxygen, sulphur and fluorine, are tested for their ability to improve the cycling of lithium in a hostile ionic liquid medium. Oxygen based vinylene carbonate is found to offer the best protection of the lithium metal whilst allowing very consistent lithium cycling to occur. The vinylene carbonate based system under study is, however, imperfect. Lithium metal is deposited in a dendritic morphology, and vinylene carbonate is rapidly consumed during lithium cycling if it is present in a small quantity. Our results suggest that ionic liquid systems critically relying on a small amount of additive to protect a lithium electrode are not viable for long cycle life secondary batteries. It is suggested that an ionic liquid which itself is lithium metal compatible be used instead.
History
Journal
Electrochimica actaVolume
55Issue
6Pagination
2210 - 2215Publisher
Elsevier Science Pub. Co.Location
New York, N.Y.Publisher DOI
ISSN
0013-4686eISSN
1873-3859Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2009, Elsevier Ltd.Usage metrics
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