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Co-ion leakage through bipolar membranes Influence on I-V responses and water-splitting efficiency

par El Moussaoui, Rachid ;Pourcelly, Gerald;Maeck, Maurice;Hurwitz, Heinz Dieter ;Gavach, Claude
Référence Journal of membrane science, 90, 3, page (283-292)
Publication Publié, 1994-05

Article révisé par les pairs

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Résumé :

The influence of co-ion leakage through a bipolar membrane on both I-V response and current efficiency of water dissociation was studied. The monofilm bipolar membrane was synthetized from a pretreated ETFE film functionalized by quaternized ammonium groups on one side and sulphonic groups on the other. The co-ion leakage of this bipolar membrane immersed in NaCl solutions was measured by means of radiotracers. The results showed that the greater the co-ion leakage, the lower was the current efficiency of water dissociation. A theoretical analysis of ion transfer through the bipolar membrane pointing out the effect of boundary layer on the limiting leakage current is presented. © 1994.