Molecular Engineering of Polyoxovanadate-Alkoxide Clusters and Microporous Polymer Membranes to Prevent Crossover in Redox-Flow Batteries
Eric Schreiber, Rachel E. Garwick, Miranda J. Baran, Michael A. Baird, Brett A. Helms, Ellen M. Matson
Abstract
) through separators derived from polymers of intrinsic microporosity (PIMs). We find that highly efficacious active-material blocking requires both increasing the size of the vanadium species and restricting pore swelling of the PIMs in nonaqueous electrolyte. Notably, increasing the size of the vanadium species does not significantly affect its redox reversibility, and reducing swelling decreases the conductivity of the separator by only 50%. By pairing polyoxometalate clusters with PIM membranes in nonaqueous redox-flow batteries, more efficient systems may well be within reach.
Topics & Concepts
Materials scienceMicroporous materialRedoxPolymerMembraneNanotechnologyAlkoxideChemical engineeringSmart materialOrganic chemistryCatalysisChemistryMetallurgyComposite materialBiochemistryEngineeringAdvanced battery technologies researchSupercapacitor Materials and FabricationAdvanced Battery Materials and Technologies