Traditional small molecular organic alkyl carbonates continue to present challenges in developing large-scale rechargeable batteries due to safety concerns surrounding their flammability and thermal instability. Herein, we will describe a new class of nonflammable liquid and solid-state electrolytes composed of oligomeric perfluorinated polyethers. These materials exhibit low glass transition temperatures, high chemical and thermal stability, and compatibility with a wide variety of polymers and electrodes, making them promising electrolyte alternatives to the low molecular weight carbonate fluids currently in use in Li ion batteries. The lithium-ion transference numbers of these perfluorinated oligomeric materials are also interestingly close to unity, potentially leading to significant improvements in durability and lifetime of use. These oligomers are being developed as an intrinsically fireproof platform that can be chemically tailored, using facile synthetic modifications to introduce wide ranges of functional groups, to achieve the desired thermal, mechanical, and conductive properties for specific battery applications1. Mesoscale ion transport and the relationship between fluoropolyether chemical structure and electrochemical property elucidated via diffusion nuclear magnetic resonance (NMR) spectroscopy and galvanostatic polarization techniques will also be discussed. (1) Wong, D. H. C.; Thelen, J. L.; Fu, Y.; Devaux, D.; Pandya, A. A.; Battaglia, V. S.; Balsara, N. P.; DeSimone, J. M. Proc Natl Acad Sci U S A 2014, 111, 3327.

Lithium-ion battery performance of perfluoropolether-based electrolytes

249th National Meeting (2015)

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