NOVELTY - A fuel cell apparatus comprises a first vessel with a second vessel, a concentric non-electrically conductive seal, an electric power supply, a supercritical fluid (SCF), and an electric load. The first vessel comprises a polymer electrolyte membrane (PEM) fuel cell membrane with an anode and a cathode connected to the circuit of the outside electrode. The conductive seal is connectably associated with each vessel. The electric power supply is connected to each vessel to connect to the anode and cathode of fuel cell.    USE - The fuel cell apparatus is used for transportation, e.g. passenger vehicles such as cars, and buses, and stationary applications.    ADVANTAGE - The apparatus increases electrical and chemical reaction efficiencies magnitudes more than prior art operating less than critical point of gas, liquids, and solids. The apparatus operates at low temperatures at 2degreesC, and can start quickly and results in less wear on system components, resulting in better durability.    DETAILED DESCRIPTION - A fuel cell apparatus comprises a first vessel with a second vessel, a concentric non-electrically conductive seal, an electric power supply, an SCF, and an electric load. The first vessel comprises a PEM fuel cell membrane with an anode and a cathode connected to the circuit of the outside electrode. The conductive seal is connectably associated with each vessel. The electric power supply is connected to each vessel to connect to the anode and cathode of fuel cell. The electric load is connected to each vessel to connect to the anode and cathode of fuel cell. The SCF is within the fuel cell vessels. The apparatus operates fuel cell units, fuel, product, membrane cathode and anode within SCFs with bifunctional electrodes and cathode feed electrolysis.    DESCRIPTION OF DRAWING(S) - The figure shows a graph illustrating the critical point and pressure and temperature above the critical point where liquid and gas phase into an SCF even in varied densities.