NOVELTY - The apparatus has a porous, hydrophilic wicking material (49) configured to conduct electrolyte coextensively with channels selected from the fuel reactant gas flow channels (20) and oxidant reactant gas flow channels (21) of the fluid impermeable separator plates (19). The wicking material has a mean pore side less than about one-half of the mean pore size of the pores in the substrates (16,17) of the contiguous fuel cells (8). The fuel cells are arranged in a stack with the fluid impermeable separator plates interspersed between the fuel cells.    USE - Liquid electrolyte fuel cell apparatus with high permeability wicking to return condensed electrolyte.    ADVANTAGE - Provides liquid electrolyte fuel cells that include fine pore, high permeability wicking between each electrode substrate and the separator plate on the anode side and for the cathode side to enhance transfer of condensed electrolyte from a condensation zone back through the remainder of the cell on the respective side. Ensures improvement that takes into account the fact that white large pores reduce resistance to flow of liquid, small pores increase the capillarity, and therefore the capillary pressure that can move the liquid through the pores. Ensures that the pore size, particle size, porosity and percent coverage in the various forms can be established so that the wick is nearly saturated when the electrolyte reservoirs or the substrates are nearly empty, thereby to ensure good in-plane transfer.    DETAILED DESCRIPTION - Each fuel cell has a pair of electrodes including an anode catalyst (12) disposed on a wettable, porous anode substrate (16), and a cathode catalyst (13) disposed on a wettable, porous cathode substrate (17). A matrix (11) is configured to hold liquid electrolyte disposed between the catalysts. The separator plates have channels at opposite surfaces including fuel reactant gas flow channels at one surface and oxidant reactant gas flow channels at a second surface opposite to one surface.    DESCRIPTION OF DRAWING(S) - The drawing is a fragmentary, simplified, sectioned side elevation views of a pair of phosphoric acid fuel cells with stippling to emphasize the position of wicking material of the present improvement.    Fuel cells (8)    Matrix (11)    Anode catalyst (12)    Cathode catalyst (13)    Anode substrate (16)    Cathode substrate (17)    Separator plates (19)    Fuel reactant gas flow channels (20)    Oxidant reactant gas flow channels (21)    Wicking material (49)