Synthesis and characterization of poly(vinyl alcohol)-acid salt polymer electrolytes
A solid acid membranes based on poly(vinyl alcohol) (PVA), magnesium bromide (MgBr2) and phosphoric acid (H3 PO4) were prepared by a solution casting method. The morphological, X-ray and electrical properties of the (PVA)(1–x) (MgBr2) x/2 (H3 PO4) x/2 solid acid membranes where x = 0.0, 0.1, 0.2, 0.3 and 0.4 wt% were investigated. The PVA polymer electrolyte directly blended with acid salt shows improvement in ionic conductivity and transport properties. The maximum ionic conductivity value of PVA/acid salt polymer electrolyte with x = 0.40 wt% of acid salt is around 1.64 ? 10 –4 S cm–1at 20 ?C and the ionic transport number (t +) is in the range of 0.98–0.99. In this work, the data shows that the (PVA)(1–x) (MgBr2) x/ 2 (H3PO4) x/ 2 solid acid salt membrane is promising for intermediate temperature phosphoric acid fuel cell applications.
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Document Type: Research Article
Publication date: December 1, 2014
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