SOFC複層アノードにおけるSDC中間層の活性作用 Active Role of SDC Interlayer in Multi-layer Anode of SOFCs

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Abstract

<p>To improve anode performance for a Solid Oxide Fuel Cell (SOFC) at medium temperature (923-1073 K), an interlayer of samaria doped ceria (SDC) is inserted between the Ni anode and the YSZ (Yttria Stabilized Zirconia) electrolyte by RF magnetron sputtering. Great reduction in anode overpotential with the interlayer is confirmed using both ac impedance and dc current interruption. The anodic interfacial conductivity, which is obtained from the complex impedance plot measured under equilibrium potential can be increased by two orders of magnitude by inserting a 2∼3 µm-thick SDC layer. This study proposes an appropriate model for the anodic reaction at this kind of multi-layer anode and discusses the mechanism for performance improvement due to insertion of the SDC interlayer. The results suggest that the SDC mixed conductivity helps to create more active reaction sites within a certain thickness in the SDC layer.</p>

Journal

  • Electrochemistry

    Electrochemistry 70(4), 252-257, 2002-04-05

    The Electrochemical Society of Japan

References:  14

Codes

  • NII Article ID (NAID)
    10008009491
  • NII NACSIS-CAT ID (NCID)
    AN00151637
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    13443542
  • NDL Article ID
    6128127
  • NDL Source Classification
    ZP1(科学技術--化学・化学工業)
  • NDL Call No.
    Z17-14
  • Data Source
    CJP  NDL  J-STAGE 
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