Nonflammable perfluoropolyether-based electrolytes for lithium batteries

作者：Wong Dominica H C; Thelen Jacob L; Fu Yanbao; Devaux Didier; Pandya Ashish A; Battaglia Vincent S; Balsara Nitash P^*; DeSimone Joseph M

来源：Proceedings of the National Academy of Sciences, 2014, 111(9): 3327-3331.

DOI：10.1073/pnas.1314615111

• fluorinated polymers
• nonflammable electrolytes

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 degrees 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.

• 出版日期2014-3-4