The Influence of Metal Ions on the Conductivity of Nafion 112 in Polymer Electrolyte Membrane Fuel Cell

Heli Wang; John A. Turner

doi:10.1016/j.jpowsour.2008.05.077

The Influence of Metal Ions on the Conductivity of Nafion 112 in Polymer Electrolyte Membrane Fuel Cell

Heli Wang, John A. Turner

Chemistry and Nanoscience

National Renewable Energy Laboratory

Research output: Contribution to journal › Article › peer-review

39 Scopus Citations

Abstract

Nafion 112 membranes were soaked in 1 M H₂SO₄ solutions containing variable amounts of Fe and Cr ions, either individually or mixed. An even distribution of the metal ions on the surface of the membranes was observed with electron probe microanalysis (EPMA) mapping. The proton conductivity of the soaked membranes was investigated using a conductivity cell. For Fe ions, the conductivity was almost constant until the Fe-ion solution concentration reached 300 ppm. Over the 300-ppm threshold, the conductivity decreased significantly. Similar results were obtained with Cr ions in the membrane, but here the threshold was approximately 200 ppm in the solution. Mixed metal ions were found to decrease these threshold values due to the additive effect of the two metals.

Original language	American English
Pages (from-to)	576-580
Number of pages	5
Journal	Journal of Power Sources
Volume	183
Issue number	2
DOIs	https://doi.org/10.1016/j.jpowsour.2008.05.077 https://doi.org/10.1016/j.jpowsour.2008.05.077
State	Published - 1 Sep 2008

NREL Publication Number

NREL/JA-560-42563

Keywords

Membrane conductivity
Metallic ions
Nafion
PEMFC

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "The Influence of Metal Ions on the Conductivity of Nafion 112 in Polymer Electrolyte Membrane Fuel Cell",

abstract = "Nafion 112 membranes were soaked in 1 M H2SO4 solutions containing variable amounts of Fe and Cr ions, either individually or mixed. An even distribution of the metal ions on the surface of the membranes was observed with electron probe microanalysis (EPMA) mapping. The proton conductivity of the soaked membranes was investigated using a conductivity cell. For Fe ions, the conductivity was almost constant until the Fe-ion solution concentration reached 300 ppm. Over the 300-ppm threshold, the conductivity decreased significantly. Similar results were obtained with Cr ions in the membrane, but here the threshold was approximately 200 ppm in the solution. Mixed metal ions were found to decrease these threshold values due to the additive effect of the two metals.",

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AU - Wang, Heli

AU - Turner, John A.

PY - 2008/9/1

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N2 - Nafion 112 membranes were soaked in 1 M H2SO4 solutions containing variable amounts of Fe and Cr ions, either individually or mixed. An even distribution of the metal ions on the surface of the membranes was observed with electron probe microanalysis (EPMA) mapping. The proton conductivity of the soaked membranes was investigated using a conductivity cell. For Fe ions, the conductivity was almost constant until the Fe-ion solution concentration reached 300 ppm. Over the 300-ppm threshold, the conductivity decreased significantly. Similar results were obtained with Cr ions in the membrane, but here the threshold was approximately 200 ppm in the solution. Mixed metal ions were found to decrease these threshold values due to the additive effect of the two metals.

AB - Nafion 112 membranes were soaked in 1 M H2SO4 solutions containing variable amounts of Fe and Cr ions, either individually or mixed. An even distribution of the metal ions on the surface of the membranes was observed with electron probe microanalysis (EPMA) mapping. The proton conductivity of the soaked membranes was investigated using a conductivity cell. For Fe ions, the conductivity was almost constant until the Fe-ion solution concentration reached 300 ppm. Over the 300-ppm threshold, the conductivity decreased significantly. Similar results were obtained with Cr ions in the membrane, but here the threshold was approximately 200 ppm in the solution. Mixed metal ions were found to decrease these threshold values due to the additive effect of the two metals.

KW - Membrane conductivity

KW - Metallic ions

KW - Nafion

KW - PEMFC

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M3 - Article

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SN - 0378-7753

VL - 183

SP - 576

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JO - Journal of Power Sources

JF - Journal of Power Sources

IS - 2

ER -

The Influence of Metal Ions on the Conductivity of Nafion 112 in Polymer Electrolyte Membrane Fuel Cell

Abstract

NREL Publication Number

Keywords

UN SDGs

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