▎ 摘　　要

Composite anion exchange membranes (AEMs) with superior conductivity are developed by cross-linking of ammonium quaternized poly(2,6-dimethyl-1,4-phenylene oxide) (QPPO) with tertiary amine groups function-alized GO (NGO). Compared to the pristine QPPO membrane, the fabricated composite anion exchange mem-branes (QPPO-NGO(x), x refers to the NGO mass percentage in the membrane) exhibit less water uptake and swelling ratio but higher ion conductivity and alkaline stability. A hydroxide conductivity as high as 123 mS cm(-1) is reached by the proposed composite membrane at 80 degrees C. The conductivity of about 83 mS cm(-1) is retained after the composite membrane immersed in 2 mol L-1 KOH aqueous solutions at 60 degrees C for 384 h. While the QPPO membrane turns into fragile after soaked in alkaline solutions for only 144 h. The single fuel cell based on the QPPO and QPPO-NGO(2) membranes demonstrates a peak power density of 289.3 mW cm(-2) at 0.53 V and 397.8 mW cm(-2) at 0.61 V, respectively, at 60 degrees C feeding with humidified hydrogen and oxygen under a back pressure of 0.1 MPa.