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High temperature polymer electrolyte membrane fuel cell Degradation provoked by ammonia as ambient air contaminant

Schonvogel, Dana and Büsselmann, Julian and Schmies, Henrike and Langnickel, Hendrik and Wagner, Peter and Dyck, Alexander (2021) High temperature polymer electrolyte membrane fuel cell Degradation provoked by ammonia as ambient air contaminant. Journal of Power Sources, 502 (1). Elsevier. doi: 10.1016/j.jpowsour.2021.229993. ISSN 0378-7753.

[img] PDF - Only accessible within DLR bis June 2023 - Postprint version (accepted manuscript)

Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0378775321005218?via%3Dihub


High temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) are used from stationary to mobile applications and have the advantage of increased tolerances against fuel impurities like H2S and CO. However, air impurities can limit their performance and durability. Here, the impact of NH3-contaminated air is studied during 500 h of operation. 10 ppm NH3 in air provokes a voltage decay of at least − 279.3 μV h− 1 compared to − 18.1 μV h− 1 during operation without NH3 demonstrating strong sensitivity of the HT-PEM technology to this air pollutant. Cyclic voltammetry shows a selectively poisoned catalyst, whereby the loss of electrochemical surface area seems to be of no importance. Impedance spectroscopy reveals affected electrode charge transfer processes and strongly affected proton conductivity. μ-computed tomography illustrates significant membrane thinning being significantly larger compared to the blank reference cell. Ion chromatography further indicates that ammonium is incorporated into the cell, so that ammonia is believed to trap the protons stemming from phosphoric acid and hydrogen oxidation reaction. In conclusion, HT-PEMFC degradation caused by ammonia naming formation and incorporation of ammonium species and formation of nitrogen species interacting with the catalyst are identified.

Item URL in elib:https://elib.dlr.de/142590/
Document Type:Article
Title:High temperature polymer electrolyte membrane fuel cell Degradation provoked by ammonia as ambient air contaminant
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schonvogel, DanaDana.Schonvogel (at) dlr.dehttps://orcid.org/0000-0002-2485-740X
Büsselmann, JulianJulian.Buesselmann (at) dlr.dehttps://orcid.org/0000-0003-2197-6056
Schmies, HenrikeHenrike.Schmies (at) dlr.dehttps://orcid.org/0000-0002-6565-1280
Langnickel, Hendrikhendrik.langnickel (at) dlr.dehttps://orcid.org/0000-0002-6395-1618
Wagner, Peterp.wagner (at) dlr.dehttps://orcid.org/0000-0002-5644-9881
Dyck, AlexanderAlexander.Dyck (at) dlr.dehttps://orcid.org/0000-0002-5010-8226
Date:May 2021
Journal or Publication Title:Journal of Power Sources
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.jpowsour.2021.229993
Keywords:High temperature PEM Fuel cells Membrane electrode assembly Durability Air pollution Ammonia
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Chemical Energy Carriers
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Processes
Location: Oldenburg
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Institute of Networked Energy Systems > Urban and Residential Technologies
Deposited By: Büsselmann, Julian
Deposited On:20 Jul 2021 14:23
Last Modified:13 Sep 2021 13:04

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