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Abstract
In polymeric proton exchange membranes, the impregnation of filler materials, such as metal–organic frameworks (MOFs), has attracted considerable attention. Aquivion® is a state-of-the-art membrane used in fuel cells and electrolysis applications because of its mechanical stability and elevated proton conductivity at high temperatures. By applying the theory of coordination networks with the incorporation of a high-proton-conductive Co-tri MOF, {[(Co(bpy)(H2O)4](Hbtc).(H2O)1.5}n, the proton conductivity of Aquivion® is improved. Co-tri MOF/Aquivion® composite membranes are prepared in different weight percentages using the solution casting method and are tested within a fuel cell system. The 1-wt.% Co-tri MOF/Aquivion® blend membrane shows an improved cell performance and a 66% increase in proton conductivity compared with that of the pristine Aquivion® membrane. The effect of Co-tri MOF on the Aquivion® membrane’s structural morphology and thermal properties is also investigated.
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