Structural stability of silver under single-chamber solid oxide fuel cell conditions

N. Akhtar, S.P. Decent, K. Kendall

    Research output: Contribution to journalArticle

    24 Citations (Scopus)

    Abstract

    In the present study, structural stability of silver under single-chamber conditions has been examined. Micro-tubular cells made of conventional solid oxide fuel cell materials (Ni-YSZ/YSZ/LSM) with silver paste and silver current-collecting wires (for both electrodes) were prepared. The cells were operated with methane/air mixture of 25/60 mL min , furnace temperature of 750 °C, and at an operating voltage of 0.5 V. The results showed increasing porosity in the current-collecting silver wire with time, leading to rupture, finally. It is postulated that the porosity formation could be due to the formation of silver oxide which is highly unstable (volatile) at operating temperature considered in this study. Furthermore, vaporization and melting of silver due to cell overheating under mixed-reactant conditions is expected. Based on experimental evidences, it is concluded that silver may not be a good choice to be employed under the above specified operating conditions, as it lacks long-term structural stability.
    Original languageEnglish
    Pages (from-to)7807-7810
    Number of pages4
    JournalInternational Journal of Hydrogen Energy
    Volume34
    Issue number18
    DOIs
    Publication statusPublished - 1 Sep 2009

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