GRAPHENE MODIFIED FLUORINATED CATION-EXCHANGE MEMBRANES FOR PEM ELECTROLYSIS

Autor/autori: Daniela ION-EBRASU, Adnana SPINU-ZAULET, Elena CARCADEA, Mihai VARLAM, Simona CAPRARESCU


Abstract: One of major current technical challenges in proton exchange membranes electrolysis is limited proton conductivity. Recent emerging material, i.e., graphene, has a great potential to improve key transport properties including proton conductivity throughout the unique two dimensional structure, and anticipated enhanced surface transport phenomena. In this paper we report on the development of graphene graphene modified fluorinated cation-exchange membranes with different graphene loadings for PEM electrolysis applications. Here we used FT-IR spectroscopy in order to identify the presence of graphene in the composite membranes. DSC and TGA characterizations were used in order to determine the thermal stability of the membranes. Properties of composite membranes were investigated, including water uptake and ion-exchange capacity (IEC). Electrochemical impedance spectroscopy (EIS) in a four-electrode arrangement was used to determine the proton conductivity of the composite membranes. The experimental results show that the proton conductivity enhancement increases with the increasing of the graphene content.

Keywords: Membranes, Nafion, Electrolysis, Graphene

 

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