Flow Channel Modification of PEM Fuel Cells: A Review of Approaches to Enhance Performance and Durability

Abstract

Fuel cells with proton exchange membranes (PEMs) hold promise as a clean and effective source of energy. For extensive commercialization, there are a number of issues that must be solved. The slow oxygen reduction reaction (ORR) kinetics at the cathode, which restricts cell performance, is one of the major issues. The altering of flow channels has received a lot of attention recently as a means of getting around this restriction. An overview of the numerous flow channel adjustments that have been suggested to improve PEM fuel cell performance is given in this review article. Different flow channel designs, surface finishings, and coatings are some of the variations. Moreover, the impact of flow channel changes on the durability, water management, and mass transportation of PEM fuel cells is explored. Finally, the current status and future directions of flow channel modification research are highlighted.