NOVELTY - The flow field e.g. cathode flow field (240) has a porous metallic structure with an inlet port (448) and an outlet port (450), and inlet channels (460) and outlet channels (470) formed within structure or on surface (442) of cathode flow field. Each of the inlet channels extends from first edge (444) in fluid communication with the inlet port and terminates at second edge (446) within the structure. Each of the outlet channels extends from second edge in fluid communication with the outlet port and terminates at first edge within the structure.    USE - Flow field e.g. cathode flow field, anode flow field for use in electrochemical cell (claimed) e.g. fuel cell, electrolysis cell used for generating current from chemical reactions or inducing chemical reaction using flow of current.    ADVANTAGE - Obtains high performance of individual fuel cell since porous metallic structures facilitate the even distribution of reactant gas to the electrode. Improves design of the porous metallic flow fields to provide improved distribution of reactant gases but without the addition of further components to the cell. Eliminates gas diffusion layers (GDLs) from the electrochemical cell assembly since porous metallic structure performs the functions typically required of GDLs. Improves overall performance and efficiency e.g. improves power density and reduces parasitic loading of the fuel stack by reducing the amount of energy required to pressurize the reactant gas i.e. reducing blower power. Improves cell oxygen distribution by allowing the incoming flow to remain oxygen rich until the flow is directed through the porous body. The cathode flow fields result in better catalyst utilization and potentially higher current density.    DESCRIPTION OF DRAWING(S) - The drawing shows a front view of the cathode flow field.    Cathode flow field (240)    Surface (442)    First edge (444)    Second edge (446)    Inlet port (448)    Outlet port (450)    Inlet channels (460)    Outlet channels (470)