Lithium ion batteries for
- transportation, e.g., electric and hybrid vehicles
- grid storage
- Enhanced safety
The flammability of conventional alkyl carbonate electrolytes hinders the integration of large-scale lithium ion batteries in transportation and grid storage applications. In this study, we have prepared a unique nonflammable electrolyte composed of low molecular weight perfluoropolyethers and bis(trifluoromethane)sulfonimide lithium salt. These electrolytes exhibit thermal stability beyond 200°C and a remarkably high transference number of at least 0.91 (more than double that of conventional electrolytes). Li/LiNi1/3Co1/3Mn1/3O2 cells made with this electrolyte show good performance in galvanostatic cycling confirming their potential as rechargeable lithium batteries with enhanced safety and longevity.
STATUS: Issued U. S. Patent # 9755273.
FOR MORE INFORMATION:
Wong, D. H. C., Thelen, J. L., Fu, Y., Devaux, D., Pandya, A. A., Battaglia, V. S., Balsara, N. P., DeSimone, J. M. “Nonflammable perfluoropolyether-based electrolytes for lithium batteries,” PNAS, Vol. 111, No. 9, 3327-3331.