No abstract

Single ion conducting polymer electrolytes (SIPEs) comprised of homopolymers containing a polysulfonylamide segment in the polymer backbone are presented.

N-alkyl-N-alkyl pyrrolidinium-based ionic liquids (ILs) are promising candidates as non-flammable plasticizers for lowering the operation temperature of poly(ethylene oxide) (PEO)-based solid polymer electrolytes (SPEs), but they present limitations in terms of lithium-ion transport, such as am uchl ower lithium transference number.T hus,apyrrolidinium cation was prepared with an oligo(ethylene oxide) substituent with seven repeating units.Weshow, by acombination of experimental characterizations and simulations,that the cationssolvating properties allow faster lithium-ion transport than alkyl-substituted analogues when incorporated in SPEs. This proceeds not only by accelerating the conduction modes of PEO,but also by enabling new conduction modes linked to the solvation of lithium by as ingle IL cation. This,c ombined with favorable interfacial properties versus lithium metal, leads to significantly improved performance on lithium-metal polymer batteries.