The phase behavior and ionic conductivity of tetraethylammonium bis(trifluoromethanesulfonyl)imide (E4NTFSI) salt mixtures with LiTFSI have been examined. Two new (1-x) EtxNTFSI-(x) LiTFSI (x = 0.50 and 0.67) mixed salt crystalline phases form. These mixtures serve as models for the previously studied N-alkyl-N-methylpyrrolidinium salt (1-x) PYRirTFSI-(x) LiTFSI mixtures. New interesting variations in the ionic conductivity are observed which are attributed to the solid-solid phase transitions of the neat Et4NTFSI salt creating disordered plastic crystalline phases. Although Et4NTFSI melts at 102°C and LiTFSI melts at 236°C, the two salts form a eutectic with a melting temperature of 31-33°C. © The Electrochemical Society.
|Publication status||Published - 2008|
|Event||Rechargeable Lithium and Lithium Ion Batteries - 212th ECS Meeting - , United States|
Duration: 1 Jan 2008 → …
|Conference||Rechargeable Lithium and Lithium Ion Batteries - 212th ECS Meeting|
|Period||1/1/08 → …|
All Science Journal Classification (ASJC) codes
Henderson, W. A., Passerini, S., De Long, H. C., & Trulove, P. C. (2008). Phase behavior and conductivity of Et4NTFSI-LiTFSI mixtures - A model system for ionic liquid lithium battery electrolytes. Paper presented at Rechargeable Lithium and Lithium Ion Batteries - 212th ECS Meeting, United States. https://doi.org/10.1149/1.2938914