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Methanol as antifreeze agent for cold start of automotive polymer electrolyte membrane fuel cells

Knorr, Florian and Garcia Sanchez, Daniel and Schirmer, Johannes and Gazdzicki, Pawel and Friedrich, K. Andreas (2019) Methanol as antifreeze agent for cold start of automotive polymer electrolyte membrane fuel cells. Applied Energy, 238, pp. 1-10. Elsevier. DOI: 10.1016/j.apenergy.2019.01.036 ISSN 0306-2619

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Official URL: https://www.sciencedirect.com/science/article/pii/S0306261919300364?via%3Dihub

Abstract

One challenge for polymer electrolyte membrane fuel cells (PEMFCs) for electric vehicles is to ensure cold start capability and longevity under freeze-thaw (F/T) cycling. Today, PEMFCs undergo dry gas purging to remove residual water before a cold shut-down to avoid degradation due to icing. This study investigates an alternative procedure with alcohol-water solution as antifreeze. In order to demonstrate the suitability of methanol as antifreeze, F/T cycling tests using methanol have been compared with conventional dry gas purging of the cell before F/T cycling. The results show that performance degradation upon F/T cycling is mitigated when flooding the cell with the antifreeze prior to F/T cycling. Specifically, performance losses are observed at high current densities only and the peak performance of the cell does not decrease. Moreover, cold start procedures are examined to allow a start-up of the cell after being soaked with the antifreeze. In this context it is found that PEMFC operation is possible at sub-zero temperature if residual methanol is in the cell. However, residual methanol decreases power density during cold start. Hence, methanol needs to be removed from the cell by reaction or by prolonged water purging to reach nominal power.

Item URL in elib:https://elib.dlr.de/126339/
Document Type:Article
Title:Methanol as antifreeze agent for cold start of automotive polymer electrolyte membrane fuel cells
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knorr, FlorianDLRUNSPECIFIED
Garcia Sanchez, DanielDaniel.GarciaSanchez (at) dlr.deUNSPECIFIED
Schirmer, JohannesJohannes.Schirmer (at) dlr.deUNSPECIFIED
Gazdzicki, PawelPawel.Gazdzicki (at) dlr.dehttps://orcid.org/0000-0002-5728-7861
Friedrich, K. Andreasandreas.friedrich (at) dlr.dehttps://orcid.org/0000-0002-2968-5029
Date:2019
Journal or Publication Title:Applied Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:238
DOI :10.1016/j.apenergy.2019.01.036
Page Range:pp. 1-10
Publisher:Elsevier
ISSN:0306-2619
Status:Published
Keywords:Polymer electrolyte membrane fuel cell; Automotive; Cold start; Freeze-thaw cycling; Antifreeze
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:25 Mar 2019 14:57
Last Modified:06 Sep 2019 15:21

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