Patent ID: 6908500
Filing Date: 2005-06-21
Classification: H01M,Y02E

Abstract:
1. A system for controlling the concentration of at least one gaseous redox byproduct in at least one of an anode fuel solution and a cathode oxidant solution of a fuel cell, the system comprising: a fluid flow field having an inlet and an outlet defining a length wherein said at least one of an anode fuel solution and a cathode oxidant slows from said inlet to said outlet; at least one barrier that is at least partially permeable to at least one of said gaseous byproducts; said barrier comprising at least a first surface and a second surface; said first surface of said barrier positioned adjacent and substantially along the length of said fluid flow field and having an effective amount of contact with said at least one of an anode fuel solution and a cathode oxidant solution; and said barrier disposed to at least effectively seal said system from migration of said at least one of an anode fuel solution and a cathode oxidant solution and said gaseous redox byproduct beyond said second surface of said barrier other than via substantially permeative transport through said barrier as at least one of an anode fuel solution and a cathode oxidant flows from said inlet to said outlet.