Electrochemical Properties of Gel Polymer Electrolyte including Zinc Acetate Dihydrate for Zinc-Air Batteries

Hui Seo Kim; Dong Yun Lee; Yong Nam Jo

doi:10.3740/MRSK.2023.33.12.550

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2023 Vol.33, Issue 12 Preview Page Next Page

Research Paper

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

27 December 2023. pp. 550-557

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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.

Keywords

zinc-air batteries

zinc acetate

gel electrolyte

ion conductivity

polyvinyl alcohol

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 33
No :12
Pages :550-557
Received Date : 2023-11-23
Revised Date : 2023-12-06
Accepted Date : 2023-12-06
DOI :https://doi.org/10.3740/MRSK.2023.33.12.550

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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