Anode-supported solid oxide fuel cells with the configuration of the La_0.2Sr_0.25Ca_0.45TiO₃ (LSCT_A−) anode, YSZ electrolyte and La_0.8Sr_0.2Co_0.2Fe_0.8O₃ (LSCF)–YSZ cathode were fabricated using tape casting and co-sintering techniques followed by pre-reduction and impregnation. In order to improve the performance, the active anodes were prepared via the wet impregnation of metallic catalysts (Ni or Ni–Fe solution). The impregnation of 3 wt% nickel significantly improved the fuel cell performance from 43 mW cm⁻² for the bare LSCT_A− anode to 112 mW cm⁻² for the Ni–LSCT_A− anode at 700 °C in humidified hydrogen containing 3 vol% H₂O. More interestingly, the substitution of 25 wt% Fe to Ni further enhances the power density by a factor of 1.5, compared to the Ni-impregnated cell. The cell infiltrated with Ni–Fe solid solution shows a slower degradation than the other two cells after the first 20 h period. High-resolution back-scattered electron (BSE) and transmission electron microscopy (TEM) images performed on the cross section of the impregnated anodes with time after ion beam preparation show that the sintering of the catalyst particles on the scaffold surface and the interaction between backbone and catalyst are the predominant contributions for the degradation of cell performance.

中文翻译：

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基于金属催化剂渗透的La和Ca掺杂的SrTiO ₃阳极载体的中温固体氧化物燃料电池性能下降的微观结构依赖性†

使用胶带制造具有La _0.2 Sr _0.25 Ca _0.45 TiO ₃（LSCT _A-）阳极，YSZ电解质和La _0.8 Sr _0.2 Co _0.2 Fe _0.8 O ₃（LSCF）–YSZ阴极构型的阳极支撑固体氧化物燃料电池铸造和共烧结技术，然后进行预还原和浸渍。为了提高性能，通过金属催化剂（Ni或Ni-Fe溶液）的湿法浸渍制备了活性阳极。裸露LSCT的3 wt％镍的浸渍使燃料电池的性能从43 mW cm ^-2显着提高_A-阳极至112毫瓦厘米^-2的Ni基LSCT _A-在加湿氢含有3体积％的H在700℃下阳极₂O.更有趣的是，与含Ni的电池相比，用25 wt％的Fe替代Ni可以进一步将功率密度提高1.5倍。在最初的20 h周期后，浸渗有Ni-Fe固溶体的细胞显示出比其他两个细胞更慢的降解。离子束制备后随时间在浸渍阳极的横截面上进行的高分辨率背散射电子（BSE）和透射电子显微镜（TEM）图像显示，催化剂颗粒在支架表面上的烧结以及骨架之间的相互作用催化剂和催化剂是降低电池性能的主要因素。