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ELEKTRODEPOSISI KARBON BINCHOTAN DENGAN DISPERSI OKSIDA LOGAM VANADIUM MENJADI TINTA KATALIS DAN PENGUJIAN KINERJANYA PADA MEMBRANE ELECTRODE ASSEMBLY DIRECT METHANOL FUEL CELL
ABSTRACT ELECTRODEPOSITION OF CARBON BINCHOTAN WITH DISPERSION OF VANADIUM METAL OXIDE INTO CATALYST INK AND TEST IN PERFORMANCE ON THE MEMBRANE ELECTRODE ASSEMBLY DIRECTH METHANOL FUELL CELL M. Try Sandi; supervised by Dr. Nirwan Syarif, M.Si. Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University xvii + 60 pages, 4 tables, 14 pictures, 5 appendices The preparation and characterization of V2O5/C electrodes and the performance test directly on Direct Methanol Fuel Cell (DMFC) has been carried out. This study employed two carbon he of carbon dots and carbon vulcan and the combination of catalyst ratio V2O5/C with the comparison of V2O5 :C = 40:60 and 60:40. Electrode characterization was done using the Cyclic Voltammetry (CV) method to get the electrochemical surface area (ECSA) value and electrochemical impedance spectroscopy (EIS) to calculate conductivity values. The MEA performance test was carried out DMFC based on the I-V and I-P performance curves with the methanol and varies load. CV measurement results obtained the best ECSA values were on the V2O5/C electrode with a 60:40 ratio that uses carbon vulcan 42.81 cm2/g and EIS measurement was obtained the best conductivity value on the V2O5/C electrode with a 60:40 carbon vulcan ratio 1.2 × 10-1 S/cm. The MEA performance test on the DMFC single stack with the concentration of methanol and varies load was obtained the best performance on the MEA that uses carbon vulcan with a 60:40 ratio with a voltage of 85.9 mV at 5% methanol concentration and 50Ω, MEA employed carbon dots as a obtained the best value at the 40:60 ratiowith a voltage 19.4 mV at 15% methanol concentration and 50Ω, but the carbon vulcan mea with a 40:60 ratio also shows a pretty good performance. Key words: Direct Methanol Fuel Cell, V2O5, Membrane Electrode Assembly (MEA), Dots, Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS). Citation : 45 (2002-2020)
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