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Results and discussion 6.4 Proton Conductivity of SULFO-MOR Modified Binding Layer MEA in DMFC In order to study the proton conductivity of DMFC using sulfonated mordenite binding layer MEA in details, a comparison graph between standard MEA, F-MOR MEA, and SULFO-MOR MEA need to be plotted together. This can highlight the enhancement of the fuel cell performance when using modified binding layer MEA. All three MEAs (0.5 wt% F-MOR and 0.5 wt% SULFO-MOR MEA and standard MEA) power densities were plotted in one graph for comparing reason before plotting the proton conductivities of the three MEAs. Figure 6.11 shows the cell voltage and the power density as a function of current density at 70°C with 1.0 M in DMFC. 1M Standard MEA F-MOR SULFO-MOR 100 90 80 70 60 50 40 30 20 10 0.7 0.6 0.5 0.4 0.3 0.2 0.1 00 0 100 200 300 400 500 600 700 Current Density (mA/cm2) Figure 6.11 Experimental work result (a) Polarization curve and (b) power density of standard, 0.5 wt%F-MOR, and SULFO-MOR modified binding layer MEA in DMFC using 1.0 M methanol and temperature 70°C The maximum power densities of the 0.5 wt% SULFO-MOR, 0.5 wt% F-MOR and standard MEA were 92, 80, and 50 mW/cm2 respectively. Plotting the standard MEA and mordenite MEA in one graph shows the difference in losses between all MEAs in DMFC. This can contribute in explaining the different behaviour of the DMFC when using modifying the binding layer. The following section will focus on the Sirhan AL-Batty Page 165 voltage (v) Power Density (mW/cm2)PDF Image | Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide
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