Radiation-Induced Synthesis of Asymmetric Porous PVDF-g-PIL Membranes via β-Cyclodextrin Leaching for Vanadium Redox Flow Battery.

ABSTRACT: This study aims to address the limitations of dense polyvinylidene fluoride (PVDF) membranes grafted with vinyl ethyl imidazole tetrafluoroborate, which exhibit low hydrophilicity and ionic conductivity in vanadium redox flow batteries (VRFBs). To improve these properties, water-soluble β-cyclodextrin was introduced as a porogen to fabricate asymmetric porous membranes. The porous structure was controlled by varying the porogen content (10-50 wt%), and the resulting membranes were characterized using FTIR, SEM, TGA, and electrochemical tests. This unique architecture led to a significant enhancement in ionic conductivity (to 71.69 mS/cm, from 6.73 mS/cm for the dense membranes), porosity (up to 40.24%), and water uptake (up to 31.8%), while maintaining robust mechanical strength (tensile s

SUBMITTER: Yu J 

PROVIDER: S-EPMC12898593 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature