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Conclusion and future work In order to achieve better adhesion at the interface between inorganic filler and polymer, pre-treatment of inorganic (mordenite) such as particle size reduction, protonation, and surface silylation must be carried out prior the MEA fabrication. In order to reduce the methanol crossover using modified binding layer with inorganic filler, it is recommended to choose a hydrophilic inorganic filler in which the water molecules is favoured. To improve the interaction of hybrid surface between the inorganic/organic interface, it is recommended to use (3-mercaptopropyl) trimethoxysilane (MPTS) over gammaglycidoxypropyltrimethoxysilane (GMPTS) To obtain the maximum power density in DMFC using modified binding layer MEA, the inorganic filler wt% should be optimized. 7.1.3 Sulfonated Mordenite Modified Binding Layer MEA It was found that the proton conductivity of the inorganic material (F-MOR) was relatively low. Therefore, to obtain maximum fuel cell efficiency when using F-MOR MEA, improving the proton conductivity of inorganic filler is recommended. To facilitate the proton transfer across the membrane when using fabricated binding layer with inorganic filler, grafting sulfonated acid group on the surface of the filler is favourable. 7.1.4 Graphene Oxide Modified Binding Layer MEA To obtain maximum power density in DMFC using a graphene oxide (GO) binding layer MEA, the weight percentage per loading of GO needs to be optimized. To reach highest power density using modified GO binding layer, it is recommended to set the fuel cell temperature at 70°C and 1.0 M methanol concentration A suitable amount of GO loading (1wt %) can reduce the methanol crossover whilst maintain good proton conductivity. Sirhan AL-Batty Page 183PDF Image | Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide
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