Abstract
Literature results concerning proton conducting polymer electrolytes are reviewed with emphasis on acid doped polymer blends and on derived systems obtained by adding an inorganic filler or a plasticizer or both. In addition, conductivity results are provided on anhydrous polyamide/H 3PO 4 blends in a wide acid concentration range and on new membranes involving a fluorinated polymer, silica and H 3PO 4 or H 2SO 4 aqueous solutions. The room temperature conductivity of 10 −1 S cm −1 reached by these membranes is discussed using in situ Raman spectroscopy measurements of the acid concentration. General trends and prospects are tentatively drawn from the available results.
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