Fuel cell

摘要

A fuel cell (A) includes electromotive portions (11), a liquid holding sheet (20a), a moisture-retentive sheet (31), a replenishing portion (20b) and a fuel adjusting film (20c). The electromotive portions (11) cause fuel and oxygen to react chemically with each other to produce electrical energy. The liquid holding sheet (20a) is provided to supply the fuel to the electromotive portions (11). The moisture-retentive sheet (31) is provided to supply the oxygen to the electromotive portions (11). The replenishing portion (20b) is provided at a predetermined portion of the liquid holding sheet (20a) to replenish the liquid holding sheet (20a) with the fuel. The fuel adjusting film (20c) is inserted in the liquid holding sheet (20a) to adjust the amounts of the fuel to be supplied from the liquid holding sheet (20a) to the electromotive portions (11).