NOVELTY - A fuel cell (100) apparatus comprises porous electrolyte support having microelectromechanical systems body with micropore channels, where support comprises sol-gel; phosphoric acid electrolyte reservoir (101); phosphoric acid electrolyte (106); cathode electrode (103); cathode flow field (104) formed by micropore channels of support connecting cathode electrode and reservoir; anode electrode (108); and anode flow field (110) formed by micropore channels of support connecting the anode electrode and the phosphoric acid electrolyte reservoir.    USE - As fuel cell apparatus for producing a fuel cell (claimed) such as electro-mechanical systems phosphoric acid fuel cells.    ADVANTAGE - The fuel cell system is ideally suited, both thermally and chemically, for operation in conjunction with a methanol reformer. The phosphoric acid fuel cell system can operate at 150-250 degrees C. The phosphoric acid fuel cell system comprises less individual parts than conventional fuel cell systems, and has other advantageous properties as well including very high surface areas, very thin membranes and membrane electrode assemblies.    DETAILED DESCRIPTION - A fuel cell (100) apparatus comprises a porous electrolyte support, where the porous electrolyte support has a microelectromechanical systems body with micropore channels, where the porous electrolyte support comprises a sol-gel; a phosphoric acid electrolyte reservoir (101); a phosphoric acid electrolyte (106) in the phosphoric acid electrolyte reservoir and in the micropore channels of the porous electrolyte support; a cathode electrode (103) contacting the microelectromechanical systems body with micropore channels and the phosphoric acid electrolyte; a cathode flow field (104) formed by the micropore channels of the porous electrolyte support connecting the cathode electrode and the phosphoric acid electrolyte reservoir; an anode electrode (108) contacting microelectromechanical systems body with micropore channels and the phosphoric acid electrolyte; and an anode flow field (110) formed by the micropore channels of the porous electrolyte support connecting the anode electrode and the phosphoric acid electrolyte reservoir. The porous electrolyte support comprises a three dimensional ''lattice'' structure. The porous electrolyte support comprises a high aspect ratio micropore structure. The porous electrolyte support is cylindrical to increase overall surface area of the electrode. The porous electrolyte support is structured to include microchannels. An INDEPENDENT CLAIM is included for a method of producing fuel cell involving providing porous microelectromechanical systems electrolyte support, where the step of providing a porous microelectromechanical systems electrolyte support includes anisotropically etching one side of a wafer to a depth of up to approximately 425 microns to create first micropores and masking and etching the other side of the wafer to create second micropores until the second micropores break through to the first micropores, filling the porous electrolyte support with a phosphoric acid electrolyte, positioning a cathode electrode in contact with the phosphoric acid electrolyte, and positioning an anode electrode contacting the phosphoric acid electrolyte. The step of providing a porous electrolyte support involves providing a porous silicon electrolyte support; or providing a porous alumina electrolyte support; or providing porous glass electrolyte support; or providing an electrolyte support made of polymer; or providing an anodized metal electrolyte support; or providing an insulated metal electrolyte support; or providing a ceramic electrolyte support; or providing an insulator electrolyte support; or providing a porous silicon electrolyte support having high surface area silicon micropores. The step of providing a porous electrolyte support anisotropically etching one side of an aerogel porous silicon wafer to a depth of up to approximately 425 microns to create first micropores and masking and etching the other side of the aerogel porous silicon wafer to create second micropores until the second micropores break through to the first micropores. The step of providing a porous electrolyte support involves providing a sol-gel porous silicon electrolyte support. The step of filling the porous electrolyte support with a phosphoric acid electrolyte involves: wicking the phosphoric acid electrolyte into the porous electrolyte support.    DESCRIPTION OF DRAWING(S) - The figure shows schematic view of phosphoric acid fuel cell.    Phosphoric acid fuel cell (100)    Phosphoric acid reservoir (101)    High surface area silicon micropores (102)    Porous cathode electrode (103)    Cathode flow fields (104)    Silicone substrate (105, 107)    Phosphoric acid electrolyte (106)    Porous anode electrode (108)    High surface area silicon micropores (109)    Anode flow fields (110)