Novel sulfonated poly (ether-ether-ketone)/phosphonic acid-functionalized siloxane composite proton exchange membranes were prepared by sol-gel method using sulfonated poly (ether-ether-ketone) as the matrix and phosphonic acid-functionalized siloxane as the crosslinking agent. Phosphonic acid functionalized siloxane was prepared from tetra sodium of 1-hydroxyethane-1, 1-diphosphonic acid (HEDP·Na₄) and 3-isocyanatopropyltriethoxysilane (IPTES). The Fourier transform infrared results suggest that HEDP·Na₄ was anchored into IPTES and Si-O-Si crosslinked network was formed successfully. The prepared membranes were stable up to 220 °C without any degradation and exhibited excellent dimensional stability and mechanical performance. The proton conductivity of composite membranes increased with rising the phosphonic content, especially for AES-3 and AES-4, the proton conductivity were higher than Nafion117 at 80 °C. Besides, the proton conductivity of AES-3 was up to 0.0378 S cm^-1 under 140 °C. The power density of the MEA fabricated with AES-3 could reach to 157 mW cm^-2.

以磺化聚醚醚酮为基质，以膦酸官能化硅氧烷为交联剂，通过溶胶-凝胶法制备了新型的磺化聚醚醚酮/膦酸官能化硅氧烷复合质子交换膜。 。由1-羟基乙烷-1、1-二膦酸（HEDP·Na ₄）和3-异氰酸根合丙基三乙氧基硅烷（IPTES）的四钠制备膦酸官能化的硅氧烷。傅里叶变换红外结果表明HEDP·Na ₄将其锚定到IPTES中，并成功形成了Si-O-Si交联网络。所制备的膜在高达220°C的温度下稳定，没有任何降解，并表现出优异的尺寸稳定性和机械性能。复合膜的质子电导率随膦酸含量的增加而增加，特别是对于AES-3和AES-4，在80°C时，质子电导率高于Nafion117。此外，在140℃下，AES-3的质子传导率高达0.0378S cm ^-1。用AES-3制成的MEA的功率密度可以达到157 mW cm ^-2。