Journal of Electrochemical Science and Technology

  • 제9권2호
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  • Pages.133-140
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  • 2018
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  • 2093-8551(pISSN)
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  • 2288-9221(eISSN)
한국전기화학회 (The Korean Electrochemical Society)
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Sulfur Tolerance Effects on Sr0.92Y0.08Ti0.5Fe0.5O3-δ as an Alternative Anode in Solid Oxide Fuel Cells

  • Kim, Jun Ho (School of Chemical Engineering, Chonnam National University) ;
  • Yun, Jeong Woo (School of Chemical Engineering, Chonnam National University)
  • 투고 : 2018.02.26
  • 심사 : 2018.04.09
  • 발행 : 2018.06.30
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초록

$Sr_{0.92}Y_{0.08}Ti_{0.5}Fe_{0.5}O_{3-{\delta}}$ (SYTF0.5) is investigated as an alternative anode in $H_2$ fuels containing $H_2S$ (0-200 ppm). Although additional ionic conductivity is introduced by aliovalent substitution of $Ti^{4+}$ by $Fe^{3+}$ in the B-site, the SYTF0.5 has lower electrical conductivity than that of the $Sr_{0.92}Y_{0.08}TiO_{3-{\delta}}$. Due to the mixed ionic and electronic conductive (MIEC) property exhibited in the SYTF0.5 anode, the electrochemical performance of the SYTF0.5 anode is improved, as well as the sulfur tolerance. The maximum power densities in $H_2$ at $900^{\circ}C$ for the SYT anode and the SYTF0.5 anode were 56.9 and $98.6mW/cm^2$, respectively. The maximum power density in the SYTF0.5 anode at 200 ppm of $H_2S$ concentration decreased by only 12.9% (86.3 to $75.2mW/cm^2$).

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