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Impact of load cycling on PEMFC degradation

Gama da Roch, Pedro Gomes Ferreira (2018) Impact of load cycling on PEMFC degradation. Master's, Universidade do Porto.

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Abstract

Durability of Proton Exchange Membrane Fuel Cells (PEMFC) operation is one of the main challenges in fuel cell industry and particularly in automotive applications. Current profiles applied to PEMFCs influence the degradation mechanisms presented during performance. Durability tests of approximately 450 h were performed under three different cycling ranges allowing an interpretation about reversibility and irreversibility of voltage losses. In-situ current density distribution, polarization curves, electrochemical impedance spectroscopy, cyclic voltammetry and ionic conductivity tests measurements give essential data for understanding internal behavior of cell components. Cycling perturbation tests have proven to be less exhausting for cell performance, relatively to constant operation. Operating under high potential values induces higher degradation, even worse if open circuit voltage is included, with Pt migration to the membrane.

Item URL in elib:https://elib.dlr.de/121455/
Document Type:Thesis (Master's)
Title:Impact of load cycling on PEMFC degradation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gama da Roch, Pedro Gomes FerreiraDLRUNSPECIFIED
Date:February 2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:72
Status:Published
Keywords:PEMFC, degradation, reversible losses, irreversible losses, current density distribution
Institution:Universidade do Porto
Department:Department of Chemical Engineering
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: Gazdzicki, Dr. Pawel
Deposited On:24 Aug 2018 14:22
Last Modified:24 Aug 2018 14:22

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