Method and apparatus for distributing water to an ion-exchange membrane in a fuel cell

摘要

A method and apparatus are provided for distributing water produced by the electrochemical reaction to an ion-exchange membrane in an electrochemical fuel cell. The method comprises periodically reversing the flow direction of an oxidant stream through a fuel cell flow field. The apparatus comprises a fuel stream flow switching device for periodically switching the flow direction of a fuel stream through a fuel cell flow field.