| 摘要 |
A fuel cell system and a method of operating a fuel cell system are disclosed wherein an external electric source ( 4 ) is provided to apply current to a fuel cell ( 1 ), comprised of a polymer electrolyte membrane-electrode catalyst complex having a polymer electrolyte membrane ( 21 ) sandwiched between a fuel electrode ( 24 A) and an oxidant electrode ( 24 B) and separators ( 26, 28 ) formed with flow channels ( 27, 29 ) to supply fuel and oxidant to the polymer electrolyte membrane-electrode catalyst complex, and operative to change a direction in which current is applied to the fuel cell ( 1 ).
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