Moldable separator plate for electrochemical devices and cells

A flowfield plate for an electrochemical cell comprising:

• a plenum in fluid connection with a reactant fluid inlet for receiving a reactant fluid;
• a flow channel in fluid connection with a fluid outlet;
• a land extending between said plenum and a face of said flowfield plate;
• a hole extending through said land, said hole placing said plenum in fluid connection with said face of said flowfield plate, said hole configured so as to deliver said reactant fluid to a catalyst layer of said electrochemical cell, such that said reactant fluid has a velocity component perpendicular to a surface of said catalyst layer, said catalyst layer being disposed near said face.

An injection molded flowfield plate for an electrochemical cell comprising:

• a plenum in fluid connection with a reactant fluid inlet for receiving a reactant fluid;
• electrically conductive struts disposed in said plenum;
• a flow channel in fluid connection with a fluid outlet;
• a land extending between said plenum and a face of said flowfield plate;
• a hole extending through said land, said hole placing said plenum in fluid connection with said face of said flowfield plate, said hole being substantially perpendicular to said face, whereby said reactant fluid is delivered with a velocity component perpendicular to said face, to a gas diffusion layer of said electrochemical cell, said gas diffusion layer being adjacent said face.