Alicyclic Design of Sulfonated Polyimide Membranes with a Tricyclodecane Diamine for Improved Ion Crossover Blocking in Vanadium Redox Flow Batteries.

ABSTRACT: Polyimides (PIs), known for high thermal stability, strength, and chemical resistance, are used in energy systems, such as fuel cells and redox flow batteries. Despite Nafion membranes offering high proton conductivity, their high cost, strong water dependency, and severe vanadium ion crossover limit their long-term stability and practical viability in vanadium redox flow batteries (VRFBs). Thus, designing high-performance proton exchange membranes (PEMs) based on PI with both selective proton conductivity and vanadium ion blocking capability has become a critical challenge. This study presents a design strategy that combines alicyclic and aromatic diamine monomers to achieve both structural and performance benefits. The rigid and bulky tricyclodecane diamine (TCDDA) is copolymerized with

SUBMITTER: Chang CY 

PROVIDER: S-EPMC12511967 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature