| 摘要 |
PROBLEM TO BE SOLVED: To prevent leak of a fuel gas and water produced by electrode reaction to the outside of a fuel cell by using a polymer material having polyiosbutylene in the principal chain as a sealing material in the periphery of a reaction electrode. SOLUTION: A pair of reaction electrodes arranged on both sides of a solid polymer electrolyte film is interposed between a pair of bipolar plates for supplying/-exhausting fuel gas, and cooling jigs are attached to the bipolar plates. A sealing material made from a polymer material having polyisobutylene in the principal chain represented by the formula is arranged in the periphery of a reaction electrode. In the formula, R1 , R2 are non-functional groups at the terminals, Xi, Yi are functional groups capable of polymerizing and form the crosslinking points after polymerization, (m) is an integer of at least 1 representing the repeating number of isobutylene oligomer, and (i) is an integer of at least one representing polymerization degree. Leak of a coolant passing through a cooling jig to the outside of a fuel cell is prevented. Mixing of an electron conducting material to the polymer material of the sealing material is allowable. |
