Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Characterization of LaCoO3 Perovskite Catalyst for Oxygen Reduction Reaction in Zn-air Rechargeable Batteries

아연-공기전지용 페롭스카이트 산화물 촉매의 산소환원반응 특성

  • Sun, Ho-Jung (Department of Material Science & Engineering Kunsan National University) ;
  • Cho, Myung-Yeon (Department of Material Science & Engineering Kunsan National University) ;
  • An, Jung-Chul (Carbon Materials Research Group, Research Institute of Industrial Science & Technology) ;
  • Eom, Seungwook (Battery Research Center Korea Electrotechnology Research Institute) ;
  • Park, Gyungse (Department of Chemistry Kunsan National University) ;
  • Shim, Joongpyo (Department of Nano & Chemical Engineering, Kunsan National University)
  • 선호정 (군산대학교 신소재공학과) ;
  • 조명연 (군산대학교 신소재공학과) ;
  • 안정철 (포항산업과학연구원 탄소소재연구실) ;
  • 엄승욱 (한국전기연구원 전지연구센터) ;
  • 박경세 (군산대학교 화학과) ;
  • 심중표 (군산대학교 나노화학공학과)
  • Received : 2014.06.27
  • Accepted : 2014.08.31
  • Published : 2014.08.30
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Abstract

$LaCoO_3$ powders synthesized by Pechini process were pulverized by planetary ball-milling to decrease particle size and characterized as a catalyst in alkaline solution for oxygen reduction and evolution reaction (ORR & OER). The changes of physical properties, such as particle size distribution, surface area and electric conductivity, were analyzed as a function of ball-milling time. Also, the variations of the crystal structure and surface morphology of ball-milled powders were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The electrochemically catalytic activities of the intrinsic $LaCoO_3$ powders decreased with increasing ball-milling time, but their electrochemical performance as an electrode improved by the increase of the surface area of the powder.

Keywords

References

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