Selective conducting polymers for nonaqueous redox flow batteries

Selective conducting polymers for nonaqueous redox flow batteries

Large scale energy storage is essential for integrating intermittent renewable sources into the grid. Redox flow batteries are a compelling solution for this challenge because they offer scalable, long-duration energy storage with independent power and energy capacity. These characteristics make them ideal for supporting renewable energy integration and stabilizing electrical grids in a sustainable and cost-effective way. Non-aqueous redox flow batteries offer advantages over aqueous systems but lack suitable membrane separators. This presentation discusses a membrane based on sulfonated poly(phenylene oxide) for non-aqueous flow battery applications. Membranes exhibited favorable conductivity, selectivity, and stability. A thermodynamic framework revealed a decoupling of ion and redox molecule transport. These findings inform future membrane separator design for advanced non-aqueous flow battery systems.

Presented by: Geoffrey M. Geise, Ph.D.

Department of Chemical Engineering, University of Virginia, Charlottesville, VA

Dr. Geoffrey M. Geise is an associate professor at the University of Virginia in the Department of Chemical Engineering and in the Department of Materials Science and Engineering by courtesy. His research focuses on studying the fundamentals of chemically- and electrochemically-driven small molecule transport through polymeric materials to engineer membranes that will address global water shortages and need for clean energy (e.g., selective ion separations, desalination membranes, and flow battery separators). He has received several professional and academic awards and honors including the NSF CAREER Award, Best ES&T Engineering Paper Award for 2022, Best ES&T Letters Paper Award for 2019, I&ECR 2020 Class of Influential Researchers Recognition, 2018, 2021 & 2023 Robert A. Moore, Jr. Award in Chemical Engineering, Ralph E. Powe Junior Faculty Award, the Young Membrane Scientist Award from the North American Membrane Society (NAMS), the New Professor Travel Award from Engineering Conferences International, and a University of Virginia Excellence in Diversity Fellowship.

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9:00 PM ET Wednesday, September 24, 2025

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1:00 PM ET Thursday, September 25, 2025

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