Thermal Properties of Ionic Liquid Based Electrolytes for Lithium Batteries
TP-AAB-AABC_2009_P_05
06/10/2009
- Content
- The use of large-scale lithium ion batteries for EV, HEV or PHEV calls for prioritizing safety issues. For example, the liquid electrolyte commonly used is volatile and flammable and its presence can be critical for starting a devastating thermal runaway. Using an ionic liquid based electrolyte these safety problems can be avoided while maintaining a high ionic conductivity. Asymmetric N,N dialkyl pyrrolidinium salts are promising for their stability and for their low melting point, often well below room temperature. In this report calorimetric measurements are shown for a series of salts. The phase diagram for this type of salts is generally rather complicated and shows multiple transitions, including a rotator phase transition. The crystallisation process in the pure materials is generally very slow, but can be stimulated by cautious annealing routines.
- Citation
- Mellander, B., and Furlani, M., "Thermal Properties of Ionic Liquid Based Electrolytes for Lithium Batteries," SAE Technical Paper TP-AAB-AABC_2009_P_05, 2009, .