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Preparation of Gel Polymer Electrolyte Membranes of Polyvinyl Alcohol and Poly (acrylic acid) for Zn Air Batteries  

Kim, Chanhoon (School of Energy.Materials and Chemical Engineering, Korea University of Technology and Education)
Koo, Ja-Kyung (School of Energy.Materials and Chemical Engineering, Korea University of Technology and Education)
Publication Information
Membrane Journal / v.22, no.3, 2012 , pp. 208-215 More about this Journal
Abstract
Gel polymer electrolyte membranes were prepared from blends of polyvinyl alcohol (PVA) and poly (acrylic acid) (PAA), by solution-cast technique. The PAA content in the blend varied from 30 to 80 wt%. With the gel polymer electrolyte membranes, Zn air batteries were fabricated. The gel polymer electrolyte membranes were characterized by means of stress-strain test, impedance test. The Zn air batteries were tested by current interrupt method and galvanostatic discharge method. The tensile strength and tensile modulus decreased with increasing PAA content in the gel polymer electrolyte membrane. On the other hand, the ionic conductivity increased with increasing PAA content. The effect of ionic conductivity trend of the gel polymer electrolyte membrane in the Zn air battery was confirmed through current interrupt method and galvanostatic discharge method experiments. The battery with higher PAA content gel polymer electrolyte membrane showed lower IR drop and higher discharge capacity.
Keywords
gel polymer electrolyte membrane; Zn air battery; ionic conductivity; IR drop; discharge capacity;
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Times Cited By KSCI : 3  (Citation Analysis)
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