Recent Developments in Novel Materials for Polymer Electrolyte Fuel Cells

Polymer electrolyte fuel cells (PEFCs) have emerged as promising energy conversion devices for transportation and stationary power applications due to their high efficiency, low operating temperature, and environmentally benign operation. However, their widespread commercialization remains constrained by challenges related to material cost, durability, and performance degradation. Recent advances in materials chemistry have played a critical role in addressing these limitations. This paper reviews recent developments in novel materials for PEFCs, with emphasis on polymer electrolyte membranes, electrocatalysts, catalyst supports, and electrode architectures. Advances in proton-conducting membranes, including composite, reinforced, and alternative ionomer systems, are discussed alongside progress in platinum-based alloys and non-precious metal catalysts for improved catalytic activity and stability. The role of nanostructured carbon materials, metal oxides, and hybrid supports in enhancing durability and reducing catalyst degradation is also examined. Additionally, emerging strategies for improving interfacial compatibility and water management within membrane–electrode assemblies are highlighted. Despite significant progress, challenges related to long-term stability, scalability, and cost reduction persist. Continued innovation in materials design and fundamental understanding of structure–property relationships are essential for the development of next-generation PEFC technologies.