The Korean Society of Surface Science and Engineering

Atomic layer deposition(ALD) has emerged as a promising technique for improving the performance and durability of polymer electrolyte membrane fuel cells(PEMFCs). By enabling atomic-scale precision in material deposition, ALD enhances catalyst utilization, gas diffusion layer (GDL) modification, and bipolar plate protection. ALD-based catalyst minimizes platinum usage while maintaining high electrochemical activity through controlled nanoparticle growth and alloy formation. In addition, ALD improves GDL characteristic by optimizing mass transport and water management, which enhances durability and efficiency. ALD material deposition on bipolar plates could provide superior corrosion resistance and electrical conductivity, ensuring long-term stability. However, challenges remain in scaling ALD for large-area applications, increasing process speed, and reducing costs. Future research should focus on optimizing deposition conditions, and developing cost-effective ALD systems. This review highlights the role of ALD in advancing PEMFC technology and its potential to enhance efficiency and stability.

Keywords Atomic Layer Deposition; Polymer Electrolyte Membrane Fuel Cell; Catalyst; Bipolar Plate; Gas Diffusion Layer