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Looking Inside Polymer Electrolyte Membrane Fuel Cell Stack Using Tailored Electrochemical Methods

Piela, Piotr and Mitzel, Jens and Rosini, Sebastien and Tokarz, Wojciech and Valle, Francesco and Pilenga, Alberto and Malkow, Thomas and Tsotridis, Georgios (2020) Looking Inside Polymer Electrolyte Membrane Fuel Cell Stack Using Tailored Electrochemical Methods. Transactions of the ASME, 17 (3), 031018-1. DOI: 10.1115/1.4046106

Full text not available from this repository.

Official URL: https://asmedigitalcollection.asme.org/electrochemical/article/17/3/031018/1073722/Looking-Inside-Polymer-Electrolyte-Membrane-Fuel

Abstract

Voltammetry, potentiometry, amperometry, and electrochemical impedance spectroscopy (EIS) were used to study practical polymer electrolyte membrane fuel cell (PEMFC) stacks in an attempt to validate the stack-tailored electrochemical methods and to show the range of information about a PEMFC stack obtainable with the methods. In-stack electrode voltammetry allowed to determine the type, i.e., the surface chemistry, of catalysts used to make the stack electrodes and to measure the electrodes’ true active surface areas (EASAs). Stack potentiometry gave the EASAs, too, but only after calibration of the method against voltammetry. The speed of the test is the advantage of the stack potentiometry. An amperometry-based protocol was introduced to measure the hydrogen permeability and electronic shorting of the stack membrane-electrode assemblies. Dependence of the H2 permeability on H2 pressure and the stack temperature was shown. EIS in the hydrogen-pump mode was used to study the anode and electrolyte membrane processes under load. Spectra were dominated by humidification effects, which allowed probing the external humidification distribution to the anodes in the stack. Cathode EIS spectra obtained by subtraction of H2-H2-mode spectra from H2-air-mode spectra were modeled and the ohmic, charge-transfer, and oxygen mass-transport contributions to the stack polarization under load were separated. The variability of these contributions across the stack was discussed.

Item URL in elib:https://elib.dlr.de/136842/
Document Type:Article
Title:Looking Inside Polymer Electrolyte Membrane Fuel Cell Stack Using Tailored Electrochemical Methods
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Piela, PiotrICRIUNSPECIFIED
Mitzel, JensJens.Mitzel (at) dlr.dehttps://orcid.org/0000-0001-8137-9689
Rosini, SebastienCEAUNSPECIFIED
Tokarz, WojciechICRIUNSPECIFIED
Valle, FrancescoJRCUNSPECIFIED
Pilenga, AlbertoJRCUNSPECIFIED
Malkow, ThomasJRCUNSPECIFIED
Tsotridis, GeorgiosJRCUNSPECIFIED
Date:2 March 2020
Journal or Publication Title:Transactions of the ASME
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:17
DOI :10.1115/1.4046106
Page Range:031018-1
Status:Published
Keywords:PEMFC stack testing electrochemical methods impedance voltammetry potentiometry
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Fuel cells
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Processes (Fuel Cells)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Mitzel, Dr. Jens
Deposited On:23 Oct 2020 09:46
Last Modified:23 Oct 2020 09:46

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