Polymer electrolyte fuel cell

A polymer electrolyte fuel cell comprising:

• a power generation part as an electrolyte membrane-electrode assembly formed of a solid polymer electrolyte membrane, a fuel electrode arranged in contact with one side of the solid polymer electrolyte membrane and an oxygen electrode arranged in contact with the other side of the membrane;
• and
• a fuel supply part for storing and supplying an alcohol fuel to the fuel electrode,
• wherein the fuel supply part is composed of a highly-concentration fuel tank for storing and supplying a highly-concentrated fuel and a water fuel tank for storing and supplying a water fuel, and wherein the fuel is gasified and supplied to the power generation part through a fuel gasification/supply layer provided at least between the high-concentration fuel tank and the fuel electrode, and
• wherein the fuel gasification/supply layer is formed of a porous body having gas-liquid separation properties and one or two pored plates to support the porous body, at a position between the two fuel tanks and the fuel electrode or between the high-concentration fuel tank and the fuel electrode,
• wherein opening portions of the pored plate of the high-concentration fuel tank are sealed while the water fuel tank remains opened without sealing, for storing at the time of non-power generation.