Polymer gel electrolytes (PGEs) with high conductivities can be prepared by adding 1 to 5 wt % block copolymer to a room-temperature ionic liquid (IL), such as 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (Pyrr14+/NTf2-).1,2 While the local environment of the IL changes on addition of a self-entangled block copolymer, the conductivities are often nearly as high as for the pure IL. Understanding friction and dynamics in local environments within IL-PGES will promote their applications to enhanced solar photoelectrochemical cells, ultracapacitors and lithium batteries. We will discuss measurements of the nanoscale friction and solvation dynamics in the IL-PGE obtained from time-resolved fluorescence spectroscopy of a solvatochromic probe molecule.1. H. Ye, et al., J. Electrochem. Soc., 2007, 154, A1048-A1057.2. Y. He, et al., J. Phys. Chem. B, 2007, 111, 4645-4652.

Fluorescence probing of nanoscale environments in ionic liquid polymer gels

239th National Meeting (2010)

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