Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Electrochemical Properties of Gel Polymer Electrolyte including Zinc Acetate Dihydrate for Zinc-Air Batteries

아연-공기 전지용 아세트산 아연 이수화물을 첨가한 고분자 전해질의 전기화학적 특성

  • Hui Seo Kim (Department of Advanced Material & Chemical Engineering, College of Engineering, Halla University) ;
  • Dong Yun Lee (Department of Advanced Material & Chemical Engineering, College of Engineering, Halla University) ;
  • Yong Nam Jo (Department of Advanced Material & Chemical Engineering, College of Engineering, Halla University)
  • 김희서 (한라대학교 공과대학 신소재화학공학과) ;
  • 이동윤 (한라대학교 공과대학 신소재화학공학과) ;
  • 조용남 (한라대학교 공과대학 신소재화학공학과)
  • Received : 2023.11.23
  • Accepted : 2023.12.06
  • Published : 2023.12.27
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Abstract

In zinc-air batteries, the gel polymer electrolyte (GPE) is an important factor for improving performance. The rigid physical properties of polyvinyl alcohol reduce ionic conductivity, which degrades the performance of the batteries. Zinc acetate is an effective additive that can increase ionic conductivity by weakening the bonding structure of polyvinyl alcohol. In this study, polymer electrolytes were prepared by mixing polyvinyl alcohol and zinc acetate dihydride. The material properties of the prepared polymer electrolytes were analyzed by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Also, Electrochemical impedance spectroscopy was used to calculate ionic conductivity. The electrolyte resistances of GPE, 0.2 GPE, 0.4 GPE, and 0.6 GPE were 0.394, 0.338, 0.290, and 0.213 Ω, respectively. In addition, 0.6 GPE delivered 0.023 S/cm high ionic conductivity. Among all of the polymer electrolytes tested, 0.6 GPE showed enhanced cycle life performance and the highest specific discharge capacity of 11.73 mAh/cm2 at 10 mA. These results verified that 0.6 GPE improves the performance of zinc-air batteries.

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References

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