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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effect of Conductive Additives in La0.8Sr0.2MnO3 Perovskite Electrodes for Oxygen Reduction and Evolution in Alkaline Solution

알칼리용액에서 La0.8Sr0.2MnO3 페롭스카이트 촉매의 산소환원 및 발생반응에서 도전재의 영향

  • SHIM, JOONGPYO (Dpartment of Nano & Chemical Engineering, Kunsan National University) ;
  • LOPEZ, KAREEN J. (Dpartment of Nano & Chemical Engineering, Kunsan National University) ;
  • YANG, JIN-HYUN (Dpartment of Nano & Chemical Engineering, Kunsan National University) ;
  • SUN, HO-JUNG (Dpartment of Material Science & Engineering, Kunsan National University) ;
  • PARK, GYUNGSE (Dpartment of Chemistry, Kunsan National University) ;
  • EOM, SEUNGWOOK (Battery Research Center Korea Electrotechnology Research Institute) ;
  • LEE, HONG-KI (Fuel Cell Regional Innovation Center, Woosuk University)
  • Received : 2016.05.23
  • Accepted : 2016.06.30
  • Published : 2016.06.30
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Abstract

The effects of conductive additives in a $La_{0.8}Sr_{0.2}MnO_3$ perovskite bifunctional electrode for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) were investigated in an alkaline solution. Highly porous carbon black (CB) and Ni powder were added to the bifunctional electrodes as conductive additives. The surface morphologies of electrodes containing CB and Ni were observed by scanning electron microscopy (SEM). The current densities for both ORR and OER were changed by the addition of CB. The conductive additive changed physical properties of bifunctional electrodes such as the sheet conductance, gas permeability and contact angle. It was observed that the air permeability of electrode was most effective to enhance the currents for ORR and OER.

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References

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