NOVELTY - Fuel cell comprises electrolyte (52) between anode catalyst (54) and cathode catalyst (56), porous anode substrate (58) in direct fluid communication with anode catalyst, a waterproof cathode substrate (60) in direct fluid communication with cathode catalyst, porous water transport plate (62) in direct fluid communication with cathode support, and a direct organic antifreeze solution that passes through the porous water transport plate, does not wet the cathode support and is nonvolatile at cell operating temperatures.    USE - Fuel cells for use in transportation vehicles, portable power plants or stationary power plants.    ADVANTAGE - The fuel cell can operate in sub-freezing conditions without isolating antifreeze cooling liquid from the electrodes in a sealed coolant system to reduce cost, weight and volume of the fuel cell, as well as minimise any free water in the system that may freeze when the fuel cell is not operated.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a fuel cell composed of an electrolyte between anode and cathode catalysts, a waterproof anode support next to the anode catalyst, a waterproof cathode in direct fluid communication with the cathode catalyst, porous anode water transport plate and porous cathode water transport plate in communication with respective supports, and direct antifreeze solution having a freezing point of at least -20 degreesF, a surface tension of more than 60 dyne/cm at the operating temperature of the fuel cell, a partial pressure of the antifreeze above the solution at the cell operating temperature of less than 0.005 Hg and a capacity to be oxidised by the anode and cathode catalysts at fuel cell voltages; and    (2) a fuel cell as above where the antifreeze solution is alkanetriol.    DESCRIPTION OF DRAWING(S) - The diagram shows a cross-section of a direct antifreeze cooled fuel cell.    Electrolyte (52)    Anode catalyst (54)    Cathode catalyst (56)    Porous anode substrate (58)    Cathode substrate (60)    Porous water transport plate (62)    Cathode water transport plate (64)    Porous anode diffusion layer (66)    Porous cathode diffusion layer (68)    Fuel inlet (70)    Fuel flow channels (72)    Oxidant inlet (74)    Oxidant flow channels (76)    Anode coolant channels (78)    Cathode coolant channels (80)