Journal of Inorganic Materials, Volume. 34, Issue 6, 611(2019)
Metal supported solid oxide fuel cells (MS-SOFCs) were fabricated with NiO and Fe2O3 by tape casting, screen printing, sintering and in-situ reducing process with NiO and Fe2O3. The fraction effects of Fe on residual stress, bending strength and electrochemical stability of MS-SOFC were systematically investigated. The addition of 10at% Fe2O3 in characteristic support elevated densification starting temperature up to 937 ℃, and reduced residual stress and buckling deformation to 70 MPa and 0.15 mm, respectively. After reduction, Ni0.9Fe0.1supported SOFC presented the maximum bending strength of 62.34 MPa due to the lowest porosity of 40.22% in metal scaffold. MS-SOFC steadily operated for 60 h in durability test with H2 as the fuel at a constant current density of 400 mA·cm -2 and 650 ℃. This superior performance was attributed to the higher fracture strength of Ni0.9Fe0.1 alloy support SOFC, which effectively resisted the thermal stress in operation. This research provides a promising theoretical basis for structure design and optimization of MS-SOFC.
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Kai LI, Xiao LI, Jian LI, Jia-Miao XIE.
Category: RESEARCH PAPER
Received: Sep. 3, 2018
Accepted: --
Published Online: Sep. 24, 2021
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