Reduction of residual thermal stress on anode-supported SOFCs using porous aid layers

Kyung Phil Kim, Kiho Bae, Kwon Hee Kim, Joon Hyung Shim

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    After the fabrication of anode-supported planar solid oxide fuel cells (SOFCs), the mismatch of the thermal expansion coefficients (TECs) between the anode and the electrolyte introduces residual thermal stress in the cells. This residual stress on the electrolyte limits reliable cell operation in practice, and it often results in the failure of the cells. To alleviate the residual thermal stress of the cell, especially on the surface of the electrolyte, we propose to use an additional stress relieving porous layer between the electrolyte and the cathode. To analyze the stress reducing effect of the additional layer, several numerical calculations were carried out using various designs of the aid layer. In our simulation, the residual stress in the electrolyte was significantly reduced in the aided cell structures.

    Original languageEnglish
    Pages (from-to)2149-2154
    Number of pages6
    JournalInternational Journal of Precision Engineering and Manufacturing
    Volume13
    Issue number12
    DOIs
    Publication statusPublished - 2012 Dec

    Bibliographical note

    Funding Information:
    This study was financially supported by the National Research Foundation (NRF) of the Korean Ministry of Education, Science, and Technology (MEST) (Grant No. NRF-2010-0005810).

    Keywords

    • Additional aid layer
    • Electrolyte
    • Finite element analysis
    • Residual thermal stress
    • SOFCs

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Industrial and Manufacturing Engineering
    • Electrical and Electronic Engineering

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