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Analysis of the performance of an open-cathode polymer electrolyte fuel cell stack using simultaneous electrochemical impedance spectroscopy measurements

journal contribution
posted on 27.08.2014, 11:21 authored by Samuel Cruz-Manzo, Rui Chen, Paul S. Greenwood
In this study, an analysis of the performance in a commercial opencathode polymer electrolyte fuel cell (PEFC) stack is conducted using simultaneous electrochemical impedance spectroscopy (EIS) measurements. The factors that limit the performance of the PEFC stack were evaluated with EIS measurements and the impedance model developed in the authors’ previous study. The results showed that adsorbed intermediate species during the oxygen reduction reaction (ORR) limit the PEFC stack performance. The activation overpotential in the stack was dominated by low electrocatalytic activity from one of the cells. The inhomogeneity of air flow rate for this particular PEFC stack played an important role in oxygen transport limitations and ohmic resistance. This study has demonstrated that simultaneous EIS is a powerful tool for in-situ diagnosis of a PEFC stack. This EIS understanding has enabled an assessment of the state of health and performance of the fuel cell stack.

Funding

The authors thank the Mexican National Council for Science and Technology (CONACYT) for the sponsorship of the Ph.D. research study of S. Cruz-Manzo (Grant no. 183195).

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

13TH INTERNATIONAL CONFERENCE ON ADVANCED BATTERIES, ACCUMULATORS AND FUEL CELLS (ABAF 2012)

Volume

48

Issue

1

Pages

47 - 58 (12)

Citation

CRUZ-MANZO, S., CHEN, R. and GREENWOOD, P., 2014. Analysis of the performance of an open-cathode polymer electrolyte fuel cell stack using simultaneous electrochemical impedance spectroscopy measurements. ECS Transactions, 48(1), pp.47-58.

Publisher

© The Electrochemical Society

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2014

Notes

© The Electrochemical Society, Inc. 2014. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). This paper was also presented at the 13th International Conference on Advanced Batteries, Accumulators and Fuel Cells (ABAF 2012), August 26-30, Brno, Czech Republic.

ISSN

1938-5862

Language

en

Location

Brno Univ Technol, Rectory Bldg, Brno, CZECH REPUBLIC

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