The organic-inorganic composites prepared in this way had lower methanol crossover than Nafion 115 membrane. The phosphotungstic acid/silica/SPEEK composite membranes had higher proton-conductivity than pure SPEEK membrane.

• 利用交流阻抗法测定了复合表面膜垂直方向的电导率,结果表明,复合膜的质子导电性略低于Nafion115,但复合膜的质子导电性能随着温度的提高有所增加;