Abstract
A thin film-based solid oxide fuel cell is deposited on a Ni-based metal
porous support by pulsed laser deposition with a multi-scale-graded
microstructure design. The fuel cell, around 1 μm in thickness, is
composed of a stabilized-zirconia/doped-ceria bi-layered dense
electrolyte and nanostructured Ni-stabilized zirconia and La0.6Sr0.4CoO3
electrodes as the anode and cathode, respectively. The cell is tested
at intermediate temperatures (600–650 °C) with the aim to discern the
degradation mechanisms occurring in the cell under accelerated
conditions. Under open circuit conditions, electrochemical performances
are steady, indicating the stability of the cell. Under electrical load,
a progressive degradation is activated. Post-test analysis reveals both
mechanical and chemical degradation of the cell. Cracks and
delamination of the thin films promote a significant nickel diffusion
and new phase formation. Signs of elemental distribution at low
temperature are detected throughout the cell, indicating a combination
of low energy surface elemental interdiffusion and electromigration
effects.
Original language | English |
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Journal | Journal of Materials Chemistry A |
Volume | 6 |
Issue number | 17 |
Pages (from-to) | 7887-7896 |
Number of pages | 10 |
ISSN | 2050-7488 |
DOIs | |
Publication status | Published - 2018 |