NOVELTY - Fuel cell (10) comprises chamber (24) for pumping electrolyte between porous cathode (12) and anode (18) electrodes, having oxidizer (32) for pumping electrolyte cross-flow through electrodes in direction transverse to electrolyte pumped between electrodes, where cross-flow pumped electrolyte consists of aerosol mixture with gas from fuel and oxidizer; unit for maintaining aerosol mixture and electrolyte molar concentration into electrodes in stoichiometric balance maintained by control system for metering steam/electrolyte vapor pressure; fuel volume, oxidizer mass flow.    USE - As fuel cell used to convert chemical energy in high-hydrogen-content fuels directly into electrical energy without burning the fuels for heat energy.    ADVANTAGE - The fuel cell has thicker porous electrodes than conventional fuel cells in order to incorporate greater total amounts of catalyst surface that increase volumetric electrode current density than available in prior art electrodes; also has cross-flow of fuel or oxidizer to provide greater cross-sectional electrode current density than is possible with prior art electrodes. The system reduces the thickness of liquid electrolyte films on catalyst surfaces within porous electrodes of a fuel cell in order to promote rapid ion exchange, adsorption and desorption of reaction products and initial saturation of fuel or oxygen. The fuel cell can remove reaction products and neutralize excess of ions using circulating taylor vortex flow (TVF) and circular couette flows (CCF) between electrodes. Thick electrode direct reaction fuel cells (TEDRFC) provide improvements in fuel cell current density and economics by providing new structures that facilitate use of electrolyte cross-flow through thick electrodes to achieve unprecedented current densities at lower capital cost.    DESCRIPTION OF DRAWING(S) - The figure shows fragmentary view of cross section thick electrode direct reaction fuel cell and magnified view of portion of cell's cathode electrode.    Fuel cell (10)    Cathode (12)    Anode (18)    Electrolyte chamber (24)    Oxidizer manifold (30)    Oxidizer (32)    Fuel manifold (38)