Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Synthesis and Characterizations of Mn1+XCo2-XO4 Solid Solution Catalysts for Highly Efficient Li/Air Secondary Battery

고효율의 리튬/공기 이차전지 공기전극용 Mn1+XCo2-XO4 고용체 촉매 합성 및 분석

  • Park, Inyeong (Department of Chemistry and Chemical Engineering, Center for Design and Applications of Molecular Cataysts, Inha University) ;
  • Jang, Jaeyong (Department of Chemistry and Chemical Engineering, Center for Design and Applications of Molecular Cataysts, Inha University) ;
  • Lim, Dongwook (Department of Chemistry and Chemical Engineering, Center for Design and Applications of Molecular Cataysts, Inha University) ;
  • Kim, Taewoo (Department of Chemistry and Chemical Engineering, Center for Design and Applications of Molecular Cataysts, Inha University) ;
  • Shim, Sang Eun (Department of Chemistry and Chemical Engineering, Center for Design and Applications of Molecular Cataysts, Inha University) ;
  • Park, Seok Hoon (Department of Environmental Engineering, Anyang University) ;
  • Baeck, Sung-Hyeon (Department of Chemistry and Chemical Engineering, Center for Design and Applications of Molecular Cataysts, Inha University)
  • 박인영 (인하대학교, 화학.화학공학융합학과, 분자촉매 설계 및 응용연구 사업단) ;
  • 장재용 (인하대학교, 화학.화학공학융합학과, 분자촉매 설계 및 응용연구 사업단) ;
  • 임동욱 (인하대학교, 화학.화학공학융합학과, 분자촉매 설계 및 응용연구 사업단) ;
  • 김태우 (인하대학교, 화학.화학공학융합학과, 분자촉매 설계 및 응용연구 사업단) ;
  • 심상은 (인하대학교, 화학.화학공학융합학과, 분자촉매 설계 및 응용연구 사업단) ;
  • 박석훈 (안양대학교, 환경에너지공학과) ;
  • 백성현 (인하대학교, 화학.화학공학융합학과, 분자촉매 설계 및 응용연구 사업단)
  • Received : 2015.06.20
  • Accepted : 2015.08.28
  • Published : 2015.11.30
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Abstract

$Mn_{1+X}Co_{2-X}O_4$ solid solutions with various Mn/Co ratios were synthesized by a combustion method, and used as cathode catalysts for lithium/air secondary battery. Their electrochemical and physicochemical properties were investigated. The morphology was examined by transmission electron microscopy (TEM), and the crystallinity was confirmed by X-ray diffraction (XRD) analyses. For the measurement of electrochemical properties, charge and discharge measurements were carried out at a constant current density of $0.2mA/cm^2$, monitoring the voltage change. Electrochemical impedance spectroscopy (EIS) analyses were also employed to examine the change in charge transfer resistance during charge-discharge process. $Mn_{1+X}Co_{2-X}O_4$ solid solutions showed enhanced cycleability as a cathode of Li/air secondary battery, and the performance was found to be strongly dependent on Mn/Co ratio. Among synthesized catalysts, $Mn_{1.5}Co_{1.5}O_4$ exhibited the best performance and cycleability, due to high charge transfer rate.

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References

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