Durability and degradation of vapor-fed direct dimethyl ether high temperature polymer electrolyte membrane fuel cells

Anton Vassiliev, Alexander Kappel Reumert, Jens Oluf Jensen, David Aili*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Dimethyl ether (DME) combines high energy density with easy handling and low toxicity and is therefore an attractive fuel. The absence of carbon-carbon bonds allows for electro-oxidation with good kinetics and it is therefore particularly interesting for use in fuel cells. This work presents the first durability studies of vapor-fed direct dimethyl ether fuel cells with phosphoric acid doped polybenzimidazole membranes as electrolytes. Fuel cells are operated in direct DME mode at 160 and 200 °C and the cell voltage at a constant current load of 100 mA cm−2 is recorded over more than 200 h. Regular electrochemical impedance spectroscopy and polarization data are used as diagnostic measures to monitor the cell characteristics. It is shown that the cell performance deteriorates severely within 200 h of operation at 160 or 200 °C. The degradation is connected to different modes that ultimately result in both increasing polarization resistance and increasing area specific resistance, which may be connected to the chemical incompatibility between the fuel and the electrolyte.
Original languageEnglish
JournalJournal of Power Sources
Volume432
Pages (from-to)30-37
ISSN0378-7753
DOIs
Publication statusPublished - 2019

Keywords

  • Durability
  • Fuel cell
  • Polybenzimidazole
  • Dimethyl ether
  • Phosphoric acid

Cite this

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title = "Durability and degradation of vapor-fed direct dimethyl ether high temperature polymer electrolyte membrane fuel cells",
abstract = "Dimethyl ether (DME) combines high energy density with easy handling and low toxicity and is therefore an attractive fuel. The absence of carbon-carbon bonds allows for electro-oxidation with good kinetics and it is therefore particularly interesting for use in fuel cells. This work presents the first durability studies of vapor-fed direct dimethyl ether fuel cells with phosphoric acid doped polybenzimidazole membranes as electrolytes. Fuel cells are operated in direct DME mode at 160 and 200 °C and the cell voltage at a constant current load of 100 mA cm−2 is recorded over more than 200 h. Regular electrochemical impedance spectroscopy and polarization data are used as diagnostic measures to monitor the cell characteristics. It is shown that the cell performance deteriorates severely within 200 h of operation at 160 or 200 °C. The degradation is connected to different modes that ultimately result in both increasing polarization resistance and increasing area specific resistance, which may be connected to the chemical incompatibility between the fuel and the electrolyte.",
keywords = "Durability, Fuel cell, Polybenzimidazole, Dimethyl ether, Phosphoric acid",
author = "Anton Vassiliev and Reumert, {Alexander Kappel} and Jensen, {Jens Oluf} and David Aili",
year = "2019",
doi = "10.1016/j.jpowsour.2019.05.062",
language = "English",
volume = "432",
pages = "30--37",
journal = "Journal of Power Sources",
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Durability and degradation of vapor-fed direct dimethyl ether high temperature polymer electrolyte membrane fuel cells. / Vassiliev, Anton; Reumert, Alexander Kappel; Jensen, Jens Oluf; Aili, David.

In: Journal of Power Sources, Vol. 432, 2019, p. 30-37.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Durability and degradation of vapor-fed direct dimethyl ether high temperature polymer electrolyte membrane fuel cells

AU - Vassiliev, Anton

AU - Reumert, Alexander Kappel

AU - Jensen, Jens Oluf

AU - Aili, David

PY - 2019

Y1 - 2019

N2 - Dimethyl ether (DME) combines high energy density with easy handling and low toxicity and is therefore an attractive fuel. The absence of carbon-carbon bonds allows for electro-oxidation with good kinetics and it is therefore particularly interesting for use in fuel cells. This work presents the first durability studies of vapor-fed direct dimethyl ether fuel cells with phosphoric acid doped polybenzimidazole membranes as electrolytes. Fuel cells are operated in direct DME mode at 160 and 200 °C and the cell voltage at a constant current load of 100 mA cm−2 is recorded over more than 200 h. Regular electrochemical impedance spectroscopy and polarization data are used as diagnostic measures to monitor the cell characteristics. It is shown that the cell performance deteriorates severely within 200 h of operation at 160 or 200 °C. The degradation is connected to different modes that ultimately result in both increasing polarization resistance and increasing area specific resistance, which may be connected to the chemical incompatibility between the fuel and the electrolyte.

AB - Dimethyl ether (DME) combines high energy density with easy handling and low toxicity and is therefore an attractive fuel. The absence of carbon-carbon bonds allows for electro-oxidation with good kinetics and it is therefore particularly interesting for use in fuel cells. This work presents the first durability studies of vapor-fed direct dimethyl ether fuel cells with phosphoric acid doped polybenzimidazole membranes as electrolytes. Fuel cells are operated in direct DME mode at 160 and 200 °C and the cell voltage at a constant current load of 100 mA cm−2 is recorded over more than 200 h. Regular electrochemical impedance spectroscopy and polarization data are used as diagnostic measures to monitor the cell characteristics. It is shown that the cell performance deteriorates severely within 200 h of operation at 160 or 200 °C. The degradation is connected to different modes that ultimately result in both increasing polarization resistance and increasing area specific resistance, which may be connected to the chemical incompatibility between the fuel and the electrolyte.

KW - Durability

KW - Fuel cell

KW - Polybenzimidazole

KW - Dimethyl ether

KW - Phosphoric acid

U2 - 10.1016/j.jpowsour.2019.05.062

DO - 10.1016/j.jpowsour.2019.05.062

M3 - Journal article

VL - 432

SP - 30

EP - 37

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

ER -