| 摘要 |
PROBLEM TO BE SOLVED: To provide a polymer electrolyte for a sulfonated aromatic polyether sulfone based solid polymer fuel cell, which is inexpensive, durable, and has less influence of humidity and temperature on proton conductivity, a polymer electrolyte membrane for a solid polymer fuel cell using this polymer electrolyte, and a solid polymer fuel cell using this polymer electrolyte and this polymer electrolyte membrane. SOLUTION: This polymer electrolyte for the solid polymer fuel cell comprises an aromatic polyether sulfone block copolymer comprising a hydrophilic segment containing a sulfo group and a hydrophobic segment containing no sulfo group, and the ratio of weight fraction W1 of the hydrophobic segment and weight fraction W2 of the hudrophilic segment is present in a range of 0.6<W2/W1<2.0. |
