NOVELTY - A fuel cell (20) comprises an anode and a cathode, where at least one of the anode and cathode comprises at least one electrode (25) comprising at least one channel (29) for delivering reactants and/or products.    USE - As a fuel cell useful as power source, and as e.g. direct liquid-feed fuel cell, direct methanol fuel cell, alkaline fuel cells generally, proton exchange membrane fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, solid oxide fuel cells, metal hydride fuel cells, electro-galvanic fuel cells, direct formic acid fuel cells, microbial fuel cells, reversible fuel cells, direct borohydride fuel cells, alkaline fuel cells, reformed methanol fuel cells, direct ethanol fuel cells, formic acid fuel cells, protonic ceramic fuel cells, and direct carbon fuel cell.    ADVANTAGE - The electrode can serve as both a liquid diffusion layer and a flow field plate, thus replacing the traditional elements of carbon paper, cloth diffusion layer and anode current collector. The electrode can have a structure sufficient to permit methanol diffusion while preventing methanol crossover. The electrode can also improve volumetric power density and eliminate contact resistance typically present between a conventional flow field plate and conventional diffusion electrode layer. The structure of electrode allows a fuel cell system to be fed by a high concentration liquid fuel (e.g. methanol) while reducing the liquid fuel (e.g. methanol) which crosses over to the cathode side. Manufacturing and assembly of the fuel cell can be simplified and costs can be reduced. Volumetric power density can be improved, while contact resistance (such as would normally occur between the flow field plate and a conventional electrode) can be removed. The fuel cell has no carbon paper diffusion layer.    DETAILED DESCRIPTION - A fuel cell (20) comprises an anode and a cathode, where at least one of the anode and cathode comprises at least one electrode (25) comprising at least one channel (29) for delivering reactants and/or products. The fuel cell comprises a proton conductive material adjacent the electrode, and a catalyst layer adjacent the proton conductive material, and where the electrode is adjacent the catalyst layer. The catalyst layer is decaled on the electrode or is directly coated on the surface of a diffusion layer of the electrode. The channels form a flow field pattern that is selected from parallel, serpentine, interdigitated, pin-type, and spiral. The fuel cell comprises methanol delivered by the channels. The methanol has a concentration of 25-0.1 M. The electrode comprises a porous gas diffusion layer or porous liquid diffusion layer. The average diameter of pores is 0.1-100 microns. The electrode comprises a porous gas diffusion layer treated with polytetrafluoroethylene (PTFE) solution to make its surface hydrophobic, where the weight of PTFE is less than 50% of the weight of the porous gas diffusion layer; or porous liquid diffusion layer comprising metal foam. An INDEPENDENT CLAIM is included for an electrode for a fuel cell, comprising a porous diffusion layer comprising a material selected from carbon, graphite, metal foam and/or conductive polymer; and channels formed within the porous diffusion layer for delivering reactants and/or products, where the average diameter of all pores in the porous diffusion layer is 0.1-100 microns.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the fuel cell.    Fuel cell (20)    Auxiliary flow field plate (24)    Electrode (25)    Seal (26)    Channel (29)