Membrane Fabrication of PBIs

In fuel cells, a membrane serves as an ionic conducting electrolyte, an interfacial environment for electrode reactions, an effective reactant separator, and a support for catalysts/electrodes. It is therefore essential that such a membrane exhibits, among other properties, optimized gas permeability. For this purpose, dense FBI membranes are prepared by solution casting. FBI dissolves in strong acids, bases, and a few organic solvents and membranes can be cast from their solutions accordingly. As the membranes are used in an acid-functionalized form to achieve proton conductivities. 

ANHYDROUS PROTON-CONDUCTING POLYMERS FOR HIGH-TEMPERATURE PEMFCs 

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