Solvation-Site and Dielectric Control of Ion Conduction in Polymer Electrolytes
ORAL
Abstract
Solid polymer electrolytes have the promise of improving safety and performance in energy storage devices. Metal cation-containing polymers provide a path to effective electrolytes, with dynamic metal-ligand interactions allowing mechanical properties and ionic conductivity to be widely and separately tuned. A modular synthetic platform based on thiol-ene click chemistry is presented that allows polymers to be post-functionalized with a variety of metal-binding ligands. This well-controlled model system has enabled the study of factors known or suspected to influence ionic conductivity, including segmental dynamics, dielectric constant, solvation site density, and ligand identity. Design rules based on this model platform have been developed by combining experimental results with field-theory–based simulations. The results underscore that low dielectric constant is not necessarily detrimental to ionic conductivity, especially in systems where the resulting ion aggregates form percolating domains.
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Presenters
Nicole Michenfelder-Schauser
University of California, Santa Barbara, Materials, University of California, Santa Barbara
Authors
Nicole Michenfelder-Schauser
University of California, Santa Barbara, Materials, University of California, Santa Barbara
Douglas Grzetic
University of California, Santa Barbara
Glenn H Fredrickson
University of California, Santa Barbara, Chemical Engineering, University of California, Santa Barbara
Ram Seshadri
University of California, Santa Barbara, Materials Department and Materials Research Laboratory, University of California, Materials Research Laboratory and Materials Department, University of California, Santa Barbara
Rachel A Segalman
University of California, Santa Barbara, Chemical Engineering, University of California, Santa Barbara, University of California at Santa Barbara
