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<p>Large-sized segmented-in-series solid oxide fuel cells on flat-tubular ceramic substrates (FT-SIS-SOFCs) with high redox tolerance were prepared via a one-step co-sintering process. The flat-tubular ceramic substrate was prepared by compression pressing using MgO-MgAl<sub>2</sub>O<sub>4</sub> (MMA) as raw powder. The NiO and Y<sub>2</sub>O<sub>3</sub>-stabilized ZrO<sub>2</sub> (YSZ) anode layer and the YSZ electrolyte layer were prepared by screen printing. During sintering, the diffusion depth of MgO into the anode layer was approximately 50&#xa0;μm. With an optimized anode layer thickness of about 90&#xa0;μm, the MMA-supported solid oxide fuel cell (SOFC) single cell exhibited an open circuit voltage (OCV) of 1.04&#xa0;V and a power density of 250 mW/cm<sup>2</sup> at 850&#xa0;°C. Moreover, the prepared MMA-supported SOFC single cell demonstrated superior long-term stability and excellent redox tolerance, due to its strengthened interfacial bonding and the improved redox tolerance of the MMA substrate. The large-sized 16-cells FT-SIS-SOFCs (19.50&#xa0;cm x 3.70&#xa0;cm) based on the above-mentioned MMA-supported SOFC single cell were tested. The OCV and maximum output power at 850 ℃ were 17.40&#xa0;V and 4.87&#xa0;W, respectively.</p>

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Large-Sized Segmented-in-Series SOFC on Flat-Tubular Substrates: Performance and Preliminary Redox Cycling Study

  • 期刊论文

  • 发表日期：

    2025年12月18日

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  • Yan-An Li,
  • Jiu-Tao Gao,
  • Hui-Yu Zhang,
  • Wan-Ming Li,
  • Chang-Qing Liu,
  • Cheng-Xin Li

摘要

Large-sized segmented-in-series solid oxide fuel cells on flat-tubular ceramic substrates (FT-SIS-SOFCs) with high redox tolerance were prepared via a one-step co-sintering process. The flat-tubular ceramic substrate was prepared by compression pressing using MgO-MgAl2O4 (MMA) as raw powder. The NiO and Y2O3-stabilized ZrO2 (YSZ) anode layer and the YSZ electrolyte layer were prepared by screen printing. During sintering, the diffusion depth of MgO into the anode layer was approximately 50 μm. With an optimized anode layer thickness of about 90 μm, the MMA-supported solid oxide fuel cell (SOFC) single cell exhibited an open circuit voltage (OCV) of 1.04 V and a power density of 250 mW/cm2 at 850 °C. Moreover, the prepared MMA-supported SOFC single cell demonstrated superior long-term stability and excellent redox tolerance, due to its strengthened interfacial bonding and the improved redox tolerance of the MMA substrate. The large-sized 16-cells FT-SIS-SOFCs (19.50 cm x 3.70 cm) based on the above-mentioned MMA-supported SOFC single cell were tested. The OCV and maximum output power at 850 ℃ were 17.40 V and 4.87 W, respectively.