Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effects of Electrolyte Concentration on Growth of Dendritic Zinc in Aqueous Solutions

수용액중 아연 덴드라이트의 성장 반응에 미치는 전해질 농도의 영향

  • Shin, Kyung-Hee (Distributed Power Generation and Energy Storage Group, Korea Institute of Energy Research) ;
  • Jung, Kyu-Nam (Distributed Power Generation and Energy Storage Group, Korea Institute of Energy Research) ;
  • Yoon, Su-Keun (Distributed Power Generation and Energy Storage Group, Korea Institute of Energy Research) ;
  • Yeon, Sun-Hwa (Distributed Power Generation and Energy Storage Group, Korea Institute of Energy Research) ;
  • Shim, Joon-Mok (Distributed Power Generation and Energy Storage Group, Korea Institute of Energy Research) ;
  • Joen, Jae-Deok (Distributed Power Generation and Energy Storage Group, Korea Institute of Energy Research) ;
  • Jin, Chang-Soo (Distributed Power Generation and Energy Storage Group, Korea Institute of Energy Research) ;
  • Kim, Yang-Soo (Suncheon center, Korea Basic Science Institute) ;
  • Park, Kyoung-Soo (Department of Chemical Engineering, Soonchunhyang University) ;
  • Jeong, Soon-Ki (Department of Chemical Engineering, Soonchunhyang University)
  • 신경희 (한국에너지기술연구원 분산발전에너지저장연구단) ;
  • 정규남 (한국에너지기술연구원 분산발전에너지저장연구단) ;
  • 윤수근 (한국에너지기술연구원 분산발전에너지저장연구단) ;
  • 연순화 (한국에너지기술연구원 분산발전에너지저장연구단) ;
  • 심준목 (한국에너지기술연구원 분산발전에너지저장연구단) ;
  • 전재덕 (한국에너지기술연구원 분산발전에너지저장연구단) ;
  • 진창수 (한국에너지기술연구원 분산발전에너지저장연구단) ;
  • 김양수 (한국기초과학지원연구원 순천센터) ;
  • 박경수 (순천향대학교 나노화학공학과) ;
  • 정순기 (순천향대학교 나노화학공학과)
  • Received : 2012.08.01
  • Accepted : 2012.08.24
  • Published : 2012.08.31
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Abstract

In order to understand the nature of dendritic zinc growth, electrochemical zinc redox reaction on nickel plate was investigated in aqueous solutions containing different concentrations, 0.2, 0.1 and 0.02 $mol{\cdot}dm^{-3}$ (M), of zinc sulfate ($ZnSO_4$) or zinc chloride ($ZnCl_2$). Zinc ion was efficiently reduced and oxidized on nickel in the high-concentration (0.2 M) solution, whereas relatively poor efficiency was obtained from the other low-concentration solutions (0,1 and 0.02 M). Cyclic voltammetry (CV) analysis revealed that the 0.2 M electrolyte solution decomposes at more positive potentials than the 0.1 and the 0.02 M solutions. These results suggested that the concentration of electrolyte solution and anion would be an important factor that suppresses the reaction of the zinc dendrite formation. Scanning Electron Microscopy (SEM) data revealed that the shape of dendritic zinc and its growing behavior were also influenced by electrolyte concentration.

Keywords

References

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