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Analysis of high temperature polymer electrolyte membrane fuel cell electrodes using electrochemical impedance spectroscopy

Lookup NU author(s): Professor Mohamed MamloukORCiD, Emeritus Professor Keith Scott

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Abstract

An electrochemical impedance spectroscopy (EIS) study of electrodes in a phosphoric acid loaded polybenzimidazole (PBI) membrane fuel cell is reported. Using EIS, the effect of electrode parameters such as Pt catalyst wt%, acid doping in PBI and PTFE baesd electrodes and catalyst heat treatment on kinetic and mass transport characteristics is characterised. The influence of cell parameters of current load, temperature and oxidant gas on response is demonstrated and interpreted using an equivalent circuit model. For polarisable electrodes under small to medium steady-state current operation, the model was capable of identifying electrodes with the best kinetic or mass transport behaviour and classifying behaviour in terms of relative performance. (C) 2011 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Mamlouk M, Scott K

Publication type: Article

Publication status: Published

Journal: Electrochimica Acta

Year: 2011

Volume: 56

Issue: 16

Pages: 5493-5512

Print publication date: 01/06/2011

ISSN (print): 0013-4686

ISSN (electronic): 1873-3859

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/j.electacta.2011.03.056

DOI: 10.1016/j.electacta.2011.03.056

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