biostudies-literatureLi X2023 Youth Talent Introduction Scientific Research Startup Fee2023 Support Funds for Talent Introduction in Heilongjiang ProvinceNational Natural Science Foundation of China2287https://www.ebi.ac.uk/biostudies/studies/S-EPMC12430635biostudies-literatureUnknown17(17)Proton-exchange membranes (PEMs) are the pivotal components of vanadium redox flow batteries (VRFBs) and play a critical role in the comprehensive output performance of VRFB systems. Currently, the most widely commercialized membranes are Nafion series membranes produced by DuPont, Wilmington, DE, USA, but the high vanadium permeability and cost hinder their large-scale promotion. Hence, there is an active demand for developing a low-cost, high-performance, and energy-efficient PEM to promote the commercialization of VRFB systems. In this paper, sulfonated poly(ether ether ketone) (SPEEK) as matrix and zirconia nanoparticles as inorganic filler were used for composite modification to prepare a series of SPEEK-ZrO₂ organic-inorganic hybrid membranes for VRFBs. The thickness of thPolymersSulfonated Poly(ether ether ketone)-Zirconia Organic-Inorganic Hybrid Membranes with Enhanced Ion Selectivity and Hydrophilicity for Vanadium Redox Flow Batteries.PMC12430635AUGA2160100623AUGA216050172352407239Li XHe DGuo WSun CYe TLiu WMeng GGrigoriev SAfalseSulfonated Poly(ether ether ketone)-Zirconia Organic-Inorganic Hybrid Membranes with Enhanced Ion Selectivity and Hydrophilicity for Vanadium Redox Flow Batteries.Proton-exchange membranes (PEMs) are the pivotal components of vanadium redox flow batteries (VRFBs) and play a critical role in the comprehensive output performance of VRFB systems. Currently, the most widely commercialized membranes are Nafion series membranes produced by DuPont, Wilmington, DE, USA, but the high vanadium permeability and cost hinder their large-scale promotion. Hence, there is an active demand for developing a low-cost, high-performance, and energy-efficient PEM to promote the commercialization of VRFB systems. In this paper, sulfonated poly(ether ether ketone) (SPEEK) as matrix and zirconia nanoparticles as inorganic filler were used for composite modification to prepare a series of SPEEK-ZrO₂ organic-inorganic hybrid membranes for VRFBs. The thickness of th2025-01-01T00:00:00Z2025 Aug2026-04-08T19:32:29.149Z2026-04-08T13:55:55.898ZS-EPMC124306354094220510.3390/polym17172287