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A transient multi-scale model for direct methanol fuel cells

Jahnke, Thomas and Zago, Matteo and Casalegno, Andrea and bessler, Wolfgang and Latz, Arnulf (2017) A transient multi-scale model for direct methanol fuel cells. Electrochimica Acta, 232, pp. 215-225. Elsevier. doi: 10.1016/j.electacta.2017.02.116. ISSN 0013-4686.

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Official URL: https://doi.org/10.1016/j.electacta.2017.02.116


The DMFC is a promising option for backup power systems and for the power supply of portable devices. However, from the modeling point of view liquid-feed DMFC are challenging systems due to the complex electrochemistry, the inherent two-phase transport and the effect of methanol crossover. In this paper we present a physical 1D cell model to describe the relevant processes for DMFC performance ranging from electrochemistry on the surface of the catalyst up to transport on the cell level. A two-phase flow model is implemented describing the transport in gas diffusion layer and catalyst layer at the anode side. Electrochemistry is described by elementary steps for the reactions occurring at anode and cathode, including adsorbed intermediate species on the platinum and ruthenium surfaces. Furthermore, a detailed membrane model including methanol crossover is employed. The model is validated using polarization curves, methanol crossover measurements and impedance spectra. It permits to analyze both steady-state and transient behavior with a high level of predictive capabilities. Steady-state simulations are used to investigate the open circuit voltage as well as the overpotentials of anode, cathode and electrolyte. Finally, the transient behavior after current interruption is studied in detail

Item URL in elib:https://elib.dlr.de/117423/
Document Type:Article
Title:A transient multi-scale model for direct methanol fuel cells
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Jahnke, ThomasThomas.Jahnke (at) dlr.deUNSPECIFIED
Zago, MatteoPolitecnico di MilanoUNSPECIFIED
Casalegno, AndreaPolitecnico di MilanoUNSPECIFIED
bessler, Wolfgangwolfgang.bessler (at) hs-offenburg.deUNSPECIFIED
Latz, Arnulfarnulf.latz (at) dlr.deUNSPECIFIED
Journal or Publication Title:Electrochimica Acta
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.electacta.2017.02.116
Page Range:pp. 215-225
Keywords:Direct methanol fuel cell (DMFC), modeling, performance, transient
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) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Jahnke, Thomas
Deposited On:21 Dec 2017 16:51
Last Modified:16 May 2022 08:24

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