Abstract NiO–YSZ composite nanopowders were synthesized through a hydrothermal process without an additional mixing of NiO and YSZ nanopowders. Porous Ni–yttria stabilized zirconia (YSZ) composites, Ni–YSZ composites, with high porosity (25.0–32.8%) were fabricated by reducing NiO-YSZ composites in (94% Ar + 6% H2) gas. The electrical conductivity (14,221 cm−1 at 30 °C) and bending strength (130 MPa) of Ni–YSZ composites were enhanced by the addition of WO3 (0.1 wt% WO3) to NiO–YSZ composite nanopowders. Furthermore, the Y2(WO4)3 with a negative coefficient of thermal expansion (CTE) reduced the CTE of Ni–YSZ composites. The CTE values of 0 and 0.6 wt% WO3–added Ni–YSZ composites were 13.8 × 10−6 and 12.4 × 10−6 °C−1, respectively. We demonstrate that the fabrication of NiO–YSZ composite nanopowders and the addition of WO3 to the NiO–YSZ composite nanopowders are highly effective methods for the fabrication of high-quality Ni–YSZ anode materials in solid oxide fuel cells.

中文翻译：

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使用 NiO-YSZ 复合纳米粉末和 WO3 添加剂制备的多孔 NiO-YSZ 和 Ni-YSZ 复合材料

摘要 NiO-YSZ 复合纳米粉体是通过水热法合成的，无需额外混合 NiO 和 YSZ 纳米粉体。通过在 (94% Ar + 6% H2) 气体中还原 NiO-YSZ 复合材料，制备了具有高孔隙率 (25.0-32.8%) 的多孔 Ni-氧化钇稳定氧化锆 (YSZ) 复合材料、Ni-YSZ 复合材料。通过在 NiO-YSZ 复合纳米粉末中添加 WO3（0.1 wt% WO3），Ni-YSZ 复合材料的电导率（30°C 时为 14,221 cm-1）和弯曲强度（130 MPa）得到了增强。此外，具有负热膨胀系数 (CTE) 的 Y2(WO4)3 降低了 Ni-YSZ 复合材料的 CTE。添加 0 和 0.6 wt% WO3 的 Ni-YSZ 复合材料的 CTE 值分别为 13.8 × 10-6 和 12.4 × 10-6 °C-1。