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Electrochemical Performance of a Nd2-xSrxNiO4+δ/GDC(x = 0, 0.4, 0.6) as a SOFC Cathode Material

Nd2-xSrxNiO4+δ/GDC(x = 0, 0.4, 0.6) 공기극의 전기화학특성 평가

  • Lee, Kyoung-Jin (Division of Material Science and Engineering, Inha University) ;
  • Seo, Jeong-Uk (Division of Material Science and Engineering, Inha University) ;
  • Lim, Ye-Sol (Division of Material Science and Engineering, Inha University) ;
  • Hwang, Hae-Jin (Division of Material Science and Engineering, Inha University)
  • 이경진 (인하대학교 세라믹공학과) ;
  • 서정욱 (인하대학교 세라믹공학과) ;
  • 임예솔 (인하대학교 세라믹공학과) ;
  • 황해진 (인하대학교 세라믹공학과)
  • Received : 2014.01.08
  • Accepted : 2014.01.22
  • Published : 2014.01.31

Abstract

Mixed ionic and electronic conducting $K_2NiF_4$-type oxide, $Nd_{2-x}Sr_xNiO_{4+\delta}$ (x = 0, 0.4, 0.6) powders were synthesized by a solid-state reaction technique and solid oxide fuel cells consisting of a $Nd_{2-x}Sr_xNiO_{4+\delta}-GDC$ cathode, a Ni-YSZ anode and 8YSZ as an electrolyte were fabricated. The effect of strontium substitution for neodymium on the electrical and electrochemical properties was examined. The electrical conductivity increased with an increase in the Sr doping content, while it appears that the excess oxygen (${\delta}$) decreased. Sr doping into $Nd_2NiO_{4+\delta}$ resulted in an increase in the cathode polarization resistance and an decrease in the power density of the cell. These phenomena may be associated with the decreased amount of excess oxygen noted in the $Nd_{2-x}Sr_xNiO_{4+\delta}$ cathode.

Keywords

References

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