Reactivating the Ni-YSZ electrode in solid oxide cells and stacks by infiltration

JOURNAL OF POWER SOURCES

卷:378

Article

Skafte, Theis Loye^1,2  Hjelm, Johan²  Blennow, Peter¹  Graves, Christopher² 

[1] Haldor Topsoe Res Labs, Haldor Topsoes Alle 1, DK-2800 Lyngby, Denmark

[2] Tech Univ Denmark, Dept Energy Convers & Storage, Riso Campus,Frederiksborgvej 399, DK-4000 Roskilde, Denmark

关键词: Infiltration;    Nickel;    Gd-doped ceria;    Carbon;    Repair;    Lifetime;   

DOI  :  10.1016/j.jpowsour.2018.01.021

来源: Elsevier

【 摘 要 】

The solid oxide cell (SOC) could play a vital role in energy storage when the share of intermittent electricity production is high. However, large-scale commercialization of the technology is still hindered by the limited lifetime. Here, we address this issue by examining the potential for repairing various failure and degradation mechanisms occurring in the fuel electrode, thereby extending the potential lifetime of a SOC system. We successfully infiltrated the nickel and yttria-stabilized zirconia cermet electrode in commercial cells with Gddoped ceria after operation. By this method we fully reactivated the fuel electrode after simulated reactant starvation and after carbon formation. Furthermore, by infiltrating after 900 h of operation, the degradation of the fuel electrode was reduced by a factor of two over the course of 2300 h. Lastly, the scalability of the concept is demonstrated by reactivating an 8-cell stack based on a commercial design.

【 授权许可】

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