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산성용액에서 전해액 조성에 따른 아연공기 이차전지의 성능변화

Characterization for Performance of Zn-Air Recharegeable Batteries on Different Composition in Acidic Electrolyte

  • 대관하 (우석대학교 에너지전기공학과) ;
  • 노립신 (우석대학교 에너지전기공학과) ;
  • 심중표 (군산대학교 화학공학과) ;
  • 이홍기 (우석대학교 에너지전기공학과)
  • DAI, GUANXIA (Department of Energy and Electrical Engineering, Woosuk University) ;
  • LU, LIXIN (Department of Energy and Electrical Engineering, Woosuk University) ;
  • SHIM, JOONGPYO (Department of Chemical Engineering, Kunsan National University) ;
  • LEE, HONG-KI (Department of Energy and Electrical Engineering, Woosuk University)
  • 투고 : 2021.09.09
  • 심사 : 2021.10.11
  • 발행 : 2021.10.30

초록

The combination of different concentrations of ZnSO4 in acidic solution as electrolyte in Zn-air batteries was investigated by Zn symmetrical cell test, half-cell and full cell tests. Using 1 M ZnSO4 + 0.05 M H2SO4 as electrolyte and MnO2 as air cathode catalyst with Zn foil anode, this combination had a satisfactory performance with balance of electrochemical activity and stability. Its electrochemical activity was matched to or even better than the PtRu catalyst in different current density. And its cycle life was improved (more than 100 cycles stable) by suppressing the growth of zinc dendrites on anode obviously. This electrolyte overcame the shortcomings of alkaline electrolyte that are easy to react with CO2 in the air, severely growth of Zn dendrites caused by uneven plating/stripping of Zn.

키워드

과제정보

This work was supported by the Technology Innovation Program of Korea evaluation institute of industrial technology (KEIT) grant funded By the ministry of trade, industry & energy (MOTIE, Korea) (No. 20002425) and the national research foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1I1A3057906).

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