Durability of symmetric-structured metal-supported solid oxide fuel cells

Tucker, Michael C.

doi:10.1016/j.jpowsour.2017.09.075

Title: Durability of symmetric-structured metal-supported solid oxide fuel cells

Journal Article · 03 October 2017 · Journal of Power Sources

DOI: https://doi.org/10.1016/j.jpowsour.2017.09.075 · OSTI ID:1532213

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Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Symmetric-structure metal-supported solid oxide fuel cells (MS-SOFC) with YSZ electrolyte are fabricated with porous YSZ backbone electrodes, stainless steel supports, and infiltrated catalysts on both anode and cathode side. Durability towards aggressive thermal and redox cycling, and long-term operation is assessed. Additionally, many sealing material candidates are screened for compatibility with the cell materials and operating conditions, and a commercial sealing glass, GM31107, is selected. LSM/SDCN cells are then subjected to 200 very fast thermal cycles and 20 complete redox cycles, with minimal impact to cell performance. LSM/SDCN and SDCN/SDCN cells are operated for more than 1200 h at 700 °C. The seal and cell hermeticity is maintained, and cell ohmic impedance does not change significantly during operation. Electrode polarization increases during operation, leading to significant degradation of the cell performance. Lastly, in-operando EIS and post-mortem SEM/EDS analysis suggest that catalyst coarsening and cathode Cr deposition are the dominant degradation modes.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1532213

Alternate ID(s):: OSTI ID: 1549265

Journal Information:: Journal of Power Sources, Vol. 369, Issue C; ISSN 0378-7753

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 38 works

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