Predicting Carbonate Species Ionic Conductivity in Alkaline Anion Exchange Membranes
ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
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Advances in membrane synthesis techniques have produced polymer electrolyte membranes that are capable of transporting anions in alkaline membrane fuel cells AMFCs. These anion exchange membranes AEMs are being considered for use in portable power applications. One of the challenges with AEMs is the presence of carbonate and bicarbonate, which can replace hydroxide ions in the membrane, reducing the ionic conductivity. An experimental water permeation technique that has been developed by our lab is used to predict hydroxide ionic conductivity in AEMs 1,2. Using this method, the ionic conductivity of the membrane can be predicted for AEMs with carbonate and bicarbonate species present. Predicted results are validated using values for AEM ionic conductivity previously reported in the literature.
- Inorganic Chemistry
- Physical Chemistry
- Electrochemical Energy Storage