recent advances in nafion-based composite membranes for fuel cells: enhancing performance and durability

Proton exchange membrane fuel cells (pemfcs) have emerged as a leading clean energy technology due to their high efficiency and low environmental impact. nafion, the predominant proton exchange membrane (pem), exhibits exceptional proton conductivity, chemical stability, and mechanical strength. however, its practical application is limited by performance degradation at elevated temperatures, excessive methanol permeability, and high production costs. to address these challenges, recent studies have explored nafion-based composite membranes incorporating inorganic fillers, organic additives, metal-organic frameworks (mofs), and nanostructured materials. this review systematically evaluates recent advancements in such composite membranes, focusing on innovative strategies to enhance proton conductivity, mitigate fuel crossover, and extend operational durability. notably, the incorporation of hybrid nanomaterials and tailored architectures has yielded remarkable performance enhancements under extreme operating conditions. for future commercialization, critical research priorities include the development of cost-effective synthesis techniques, rigorous long-term stability evaluations, and scalable manufacturing processes. these efforts are essential to enable the widespread adoption of nafion-based composite membranes in next-generation pemfc systems.