Effects of Water Vapor Proportion in Generated Water on Performance of Polymer Electrolyte Fuel Cells under Dry Operating Conditions

摘要

Proton exchange membrane fuel cell (PEMFC) is a promising candidate for power sources of portable equipment and vehicle for its advantage characteristics as high-energy conversion efficiency and fast startup under conventional temperature. However, high cost and low performance are still two main barriers to its large-scale commercialization. The appropriate water and heat management in the core component membrane electrode assembly (MEA) of PEMFC is significantly important to the performance optimization because either dry or flood in MEA will greatly affect cell performance, stability and durability of fuel cell.