We report the development of a new class of “water-in-salt” electrolytes based on UV photopolymerized acrylic polymers. Incorporation of “water-in-bisalt” in a polymer matrix reduces water activity, expands the electrochemical stability window to 4.1 V, and dramatically improves cycle life in full cells with lithium titanate anodes compared to liquid water-based electrolytes.
S. A. Langevin, B. Tan, A. W. Freeman, J. C. Gagnon, C. M. Hoffman, M. W. Logan, J. P. Maranchi and K. Gerasopoulos, Chem. Commun., 2019, 55, 13085 DOI: 10.1039/C9CC06207F
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