Flow-field plate and fuel cell stack using the same

Abstract

Disclosed is a flow-field plate and fuel cell stack using the same. The flow-field plate of the present invention comprises a center hole (5) formed at the center of the flow-field plate, a inlet (6) and a outlet (7) formed on two positions near the outer edge of the flow-field plate, and flow grooves extending radially from the center hole (5) on one side of the flow-field plate. Since the flow-field plate according to the present invention may comprise flow grooves extending radially and having short flow path, which is benefit for reactants diffusion, there is no “dead-end” on the flow-field plate and reactants may distribute uniformly to each part of flow-field plate. Furthermore, resultants generated from reaction, such as water, nitrogen, carbon dioxide, etc., may be discharged in time and not accumulate on flow-field plate. Therefore, the reactant utilization ratio, the fuel cell performances and its service life may be improved.

Dependencies are inferred from the claim text.