Ethylmethylcarbonate, a promising solvent for Li-ion rechargeable batteries

Yair Ein-Eli, Stacey R. Thomas, Victor Koch, Doron Aurbach, Boris Markovsky, Alexander Schechter

Research output: Contribution to journalArticlepeer-review

100 Scopus citations


Ethylmethylcarbonate (EMC) has been found to be a promising solvent for rechargeable Li-ion batteries. Graphite electrodes, which are usually sensitive to the composition of the electrolyte solution, can be successfully cycled at high reversible capacities in several Li salt solutions in this solvent (LiAsF6, LiPF6, etc.). These results are interesting because lithium ions cannot intercalate into graphite in diethyl carbonate solutions and cycle poorly in dimethyl carbonate solutions. To understand the high compatibility of EMC for Li-ion battery systems as compared with the other two open-chain alkyl carbonates mentioned above, the surface chemistry developed in both Li and carbon electrodes in EMC solution was studied and compared with that developed on these electrodes in other alkyl carbonate solutions. Basically, the major surface species formed on both electrodes in EMC include ROLi, ROCO2Li, and Li2CO3 species. The uniqueness of EMC as a battery solvent is discussed in light of these studies.

Original languageEnglish
Pages (from-to)L273-L277
JournalJournal of the Electrochemical Society
Issue number12
StatePublished - Dec 1996
Externally publishedYes


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