Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10567618 | Journal of Power Sources | 2011 | 13 Pages |
Abstract
ⶠThis paper reports on a quantitative examination of properties and conductivities of H2O2 degraded Nafion membranes at typical PEMFC conditions. ⶠThe degradation degree (defined as loss of ion-exchange capacity, weight, and fluoride content), water uptake, and conductivity of H2O2-exposed membranes were found to strongly depend on Fe content and H2O2 treatment time. ⶠSEM cross-sections showed that the degradation initially took place in the center of the membrane. ⶠFTIR analysis revealed that Nafion degradation preferentially proceeds at the sulfonic end group and at the ether linkage located in the pendant side chain and that the H-bond of water is weakened after prolonged H2O2 exposure.
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Authors
Kitiya Hongsirikarn, Xunhua Mo, James G. Jr., Stephen Creager,