Author(s)

J. Kalhoff¹, G.-T. Kim², S. Passerini^2*, G. B. Appetecchi^3*

¹Institute of Physical Chemistry, University of Muenster, Muenster, Germany.
²Helmholtz Institute Ulm-Karlsruhe Institute of Technology, Ulm, Germany.
³ENEA, Agency for New Technologies, Energy and Sustainable Economic Development, SSPT-PROMAS-MATPRO, Rome, Italy.

In this paper we report the results of combined cycle- and life-aging and abuse tests carried out under severe conditions on Li₄Ti₅O₁₂/LiFePO₄ lithium-ion stacked prototypes using a PYR₁₄ FSI-LiTFSI ionic liquid electrolyte. No relevant degradation phenomena took place within ionic liquid electrolyte during prolonged inactivity period or overcharging. No fire/explosion or venting event as well as no gas development occurred during abuse tests, which led only to modest raise in temperature. Therefore, electrodes based on Li₄Ti₅O₁₂ and LiFePO₄ active materials can be favorably combined with non-volatile and non-flammable pyrrolidinium FSI ionic liquid electrolytes to realize highly safe lithium-ion battery systems.

Ionic Liquids, Lithium-Ion Battery Prototype, Abuse Tests

Kalhoff, J. , Kim, G. , Passerini, S. and Appetecchi, G. (2016) Safety Assessment of Ionic Liquid-Based Lithium-Ion Battery Prototypes. Journal of Power and Energy Engineering, 4, 9-18. doi: 10.4236/jpee.2016.43002.