As the need to develop renewable energy sources increases, so does the need for improved energy storage. Recent advances in battery technology have shown that covalently tethering anions to polymer chains can help prevent concentration polarization, resulting in higher currents that can be passed through the cell. One example has shown that polymers with precisely spaced sulfonic acid groups exhibited proton conductivity on par with that of Nafion<sup>TM</sup> and show promise as cation exchange membranes. In other systems, covalently incorporating anions into the ion-conducting block in lithium-polymer battery electrolytes has yielded lithium ion transference numbers close to unity. For the work described herein, polymers with precisely spaced anionic groups covalently tethered to the backbones were synthesized to improve cation transport by creating regular ion channels. These polymers were compared to analogous macromolecules with an equivalent density of anionic groups, but variable distributions within polymer chain, to study the effect of anion localization on cation transport. Overall, enhanced cation transport will lead to more efficient batteries, meeting the demand for improved energy storage.

Precision polyanions to enhance cation transport for battery applications

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.