Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Comparison of Natural Polymer Based Gel Electrolytes in Flexible Zinc-Air Batteries

플랙서블 아연-공기전지를 위한 천연 고분자 젤 전해질의 전기화학적 거동 비교

  • Byeong Jin, Jeong (Department of Advanced Materials & Chemical Engineering, College of Engineering, Halla University) ;
  • Yong Nam, Jo (Department of Advanced Materials & Chemical Engineering, College of Engineering, Halla University)
  • 정병진 (한라대학교 공과대학 신소재화학공학과) ;
  • 조용남 (한라대학교 공과대학 신소재화학공학과)
  • Received : 2022.11.18
  • Accepted : 2022.12.06
  • Published : 2022.12.27
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Abstract

Flexible zinc-air batteries have many merits, including low cost, high safety, environmentally friendliness applicability, etc. One of the key factors to improve the performance of flexible zinc-air batteries is to use a gel electrolyte. In this study, gel electrolytes were synthesized from potato, sweet potato, and corn starch. In a comparison of each starch, the corn starch-based gel electrolyte showed the highest discharge capacity of 12.41 mAh/cm2 in 20 mA and 6.47 mAh/cm2 in 30 mA. It also delivered a higher specific discharge capacity of 7.06 mAh/cm2 than the other materials after 100° bending. In addition, the electrochemical impedance spectroscopy (EIS) was analyzed to calculate the ionic conductivity. The potato, sweet potato, and corn starch-based gel electrolytes showed electrolyte resistances (Re) of 0.306, 0.298, and 0.207 Ω, respectively. In addition, the corn starch-based gel electrolyte delivered the highest ionic conductivity of 0.121 S cm-1 among the other gel electrolytes. Thus, the corn starch-based gel electrolyte was verified to improve the performance of flexible zinc-air batteries.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1G1A1007782).

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