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All fuel cells contain four main stack components, the current collector, the catalyst, electrode, and end plates. Specifically with in the last 30 years much research has been conducted on all of these components. This study looks specifically at the Nafion electrode membrane of the PEM fuel cell. The electrode in the fuel cell acts as a permeable ionic membrane, allowing hydrogen ions to pass through from the anode to the cathode. Nafion is the most promising commercially available polymer electrode available for use in PEMs and Nafion place a crucial role in ion transportation (Choi, Jalani, & Datta, 2005). Stumper, Campbell, Wilkinson, Johnson, and Davis agree that in order to achieve the optimum performance of the electrochemical reaction, the whole electrode area is of “prime importance”. State-of-the-art Many studies involving modification of Nafion membrane inside the fuel cell have been conducted to improve the performance of the fuel cell. These studies include Nafion exposed to ion bombardment, polymer doping, acid doped, precursor impregnation, and Atomic Force Microscope (AFM) tapping measurement. One method of Nafion surface modification was to use varying argon plasma energies to bombard the surface of the Nafion. The argon plasma energies ranged from 0 to 3.056 J∙cm-2. The Nafion surfaces were measured using a Scanning Electron Microscope (SEM), AFM, and X- ray Photoelectron Spectroscopy (XPS). Another important characteristic in this study was the water contact angle of the plastic. As the energy of the plasma increased the contact angle of the water decreased from 120° for the unmodified Nafion and 50° for the modified Nafion. The SEM and AFM measurements did not indicate much of an increase in the surface roughness of the Nafion membranes. The modified membranes were then tested in a Direct Methanol Fuel Cell (DMFC). The findings reported poor electrical poor electrical performance from the 8PDF Image | surface roughness of the Nafion membrane in a PEM fuel cell
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