Effect of Vinylene Carbonate on Graphite Anode Cycling Efficiency

Effect of Vinylene Carbonate on Graphite Anode Cycling Efficiency

TitleEffect of Vinylene Carbonate on Graphite Anode Cycling Efficiency
Publication TypeJournal Article
Year of Publication2009
AuthorsPaul L Ridgway, Honghe Zheng, Xiangyun Song, Gao Liu, Philip N Ross, Vincent S Battaglia
JournalElectrochemical Society
Volume19
51
Issue25
Pagination51-57
Abstract

Vinylene Carbonate (VC) was added to the electrolyte in graphite-lithium half-cells. We report its effect on the coulombic efficiency (as capacity shift) of graphite electrodes under various formation cycling conditions. Cyclic voltammetry on glassy carbon showed that VC passivates the electrode against electrolyte reduction. The dQ/dV plots of the first lithiation of the graphite suggest that VC alters the SEI layer, and that by varying the cell formation rate, the initial ratio of ethylene carbonate to VC in the SEI layer can be controlled. VC was found to decrease first cycle efficiency and reversible capacity (in ongoing cycling) when used to excess. However, experiments with VC additive used with various formation rates did not show any decrease in capacity shift.

DOI10.1149/1.3247065