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

아연공기전지를 위한 Polyvinyl Alcohol과 Poly (acrylic acid)의 블랜드를 이용한 겔 고분자 전해질막의 제조

  • 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)
  • 김찬훈 (한국기술교육대학교 에너지.신소재.화학공학부) ;
  • 구자경 (한국기술교육대학교 에너지.신소재.화학공학부)
  • Received : 2012.06.15
  • Accepted : 2012.06.28
  • Published : 2012.06.29

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.

Acknowledgement

Supported by : 한국기술교육대학교

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