Abstract
A novel multi-component system containing poly(vinyl alcohol), lithium bromide, sulfuric acid, ethylene carbonate and hydroquinone was prepared using a solution-casting technique. The presence of hydroquinone as a reducing agent in the inorganic–organic membrane structure thus produced was thought to lead to enhanced thermal stability of the membrane. The activation energy for the thermal decomposition of the product samples increased with increasing hydroquinone doping. The ionic conductivities of the films were determined from AC impedance measurements in the temperature range 300–373 K. The maximum conductivity was found to be 1.75 × 10−3 S cm−1 for a film doped with 4 wt% hydroquinone. The results give some insight into the potential utility of the membrane as a proton-conducting solid polymer electrolyte. Copyright © 2011 Society of Chemical Industry
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