High Temperature, Low Humidity Proton Exchange Membrane Based on an Inorganic–Organic Hybrid Structure

摘要

A high temperature and low humidity composite membrane consisting of Sn0.95Al0.05P2O7 and sulfonatedpolystyrene-b-polyethylene/butylene-b-polystyrene sSEBSas inorganic and organic materials, respectively, was prepared and characterized. A homogeneous distribution of the Sn0.95Al0.05P2O7 particles in the matrix was accomplished in the thickness range of 25–80 m, providing an elongation at break above 400%, which is approximately two times higher than that for Nafion. Moreover, moderate proton conductivities of sSEBS improved proton transfer between the Sn0.95Al0.05P2O7 particles in the matrix, resulting in a proton conductivity of approximately 0.01 S cm1 at 130°C without any humidification, which is 3 or more orders of magnitude higher than that for Nafion under the same conditions.