Journal
JOURNAL OF POWER SOURCES
Volume 171, Issue 2, Pages 938-943Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2007.06.005
Keywords
ionic liquid; lithium-ion battery
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The ternary [Li+][MPPip(+)][NTf2-] ionic liquid, obtained by dissolution of solid lithium bis(trifluoromethanesulfonyl)imide (LiNTf2) in liquid N-methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide (MPPipNTf(2)), was used as an electrolyte, and stable at the lithium or graphite-lithium anodes. The graphite-lithium (C6Li) anode showed good cyclability, and Coulombic efficiency in the presence of a molecular additive (10 wt.% of vinylene carbonate, VC) to the ionic liquid. The electrode showed ca. 90% of its initial discharge capacity after 100 cycles. The addition of ethylene carbonate (EC) does not improve the cyclability of the anode to the same degree as that observed in the case of vinylene carbonate. (C) 2007 Elsevier B.V. All rights reserved.
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