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dc.contributor.authorKrüger, Andries J.
dc.contributor.authorKrieg, Henning M.
dc.contributor.authorVan der Merwe, Jan
dc.contributor.authorBessarabov, Dmitri
dc.identifier.citationKrüger, A.J. et al. 2014. Evaluation of MEA manufacturing parameters using EIS for SO2 electrolysis. International journal of hydrogen energy, 39(32):18173-18181. []en_US
dc.description.abstractMembrane electrode assembly (MEA) manufacturing parameters such as hot pressing pressure and pressing time were investigated for the use in a SO2 electrolyser. The SO2 electrolysis was optimised in terms of cell temperature, membrane thickness and catalyst loading. The electrolysis efficiency was evaluated using polarisation curves while electrochemical impedance spectroscopy (EIS) was used to determine the membrane resistance, activation energy and mass transport limitations. An electrical circuit, which included inductance, ohmic resistance, charge transfer, constant phase and Warburg elements, was used to fit the experimental data. The optimum hot pressing conditions were 50 kg cm−2 for 5 min at 120 °C. Increased cell temperature (80 °C) resulted in a reduction of mass transport, while thicker membranes resulted in an increased mass transport due to lower water transport through the membrane. Increased catalyst loading (from 0.3 to 1−2) improved the cell performance due to improved kinetics confirmed by the EIS dataen_US
dc.description.sponsorshipDST (Department of Science and Technology, South Africa) under project KP5 – IO3 managed by HySA Infrastructure CoCen_US
dc.subjectElectrochemical impedance spectroscopyen_US
dc.subjectSO2 electrolyseren_US
dc.subjectProton exchange membraneen_US
dc.subjectHydrogen productionen_US
dc.titleEvaluation of MEA manufacturing parameters using EIS for SO2 electrolysisen_US
dc.contributor.researchID13061631 - Krüger, Andries Johannes
dc.contributor.researchID11087137 - Krieg, Henning Manfred
dc.contributor.researchID22730389 - Bessarabov, Dmitri Georgievich
dc.contributor.researchID20507437 - Van der Merwe, Jan Hendrik Petrus

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