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dc.contributor.advisorColucci-Ríos, José
dc.contributor.authorLópez-de Jesús, Yaritza M.
dc.description.abstractProton Exchange Membrane Fuel Cells (PEMFCs) and PEM Electrolyzer were characterized using Electrochemical Impedance Spectroscopy (EIS). Faradaic resistance (RΩ), kinetic and mass transfer parameters such as charge transfer resistance, double layer capacitance and diffusion coefficient from Warburg’s theory were obtained. The PEM electrolyzer and PEM fuel cell use perfluorocarbon sulfonic acid (PFSA) ionomer (Nafion™) as the electrolyte. The PEMFC showed more performance losses than the PEM Electrolyzer, these losses were corroborated with Warburg’s theory. The PEMFC exhibited performance losses related with mass transfer. Two PEMFCs with different catalyst loading, 0.1 and 0.3mgPt/cm2 , were compared respectively, and the memory effects were analyzed. The PEMFC with 0.3mgPt/cm2 presented better properties and less performances losses than the PEMFC with 0.1mgPt/cm2 . The memory effects of both PEMFCs were found to be related to the water content and management in the cells. This phenomenon was more evident at low applied potentials.en_US
dc.subjectProton exchange membrane fuel cells (PEMFCs)en_US
dc.subjectElectrochemical impedance spectroscopy (EIS)en_US
dc.subject.lcshFuel cells.en_US
dc.subject.lcshHydrogen as fuel.en_US
dc.subject.lcshIon permeable membranes.en_US
dc.subject.lcshProton exchange membrane fuel cells.en_US
dc.titleCharacterization of proton exchange membrane fuel cell and PEM electrolyzer using non-steady electrochemical techniques.en_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2004 Yaritza M. López de Jesúsen_US
dc.contributor.committeeBriano, Julio G.
dc.contributor.committeePortnoy, Arturo
dc.contributor.representativeVega, Carmen Engineeringen_US
dc.contributor.collegeCollege of Engineeringen_US
dc.contributor.departmentDepartment of Chemical Engineeringen_US

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