Abstract: Ni-SDC as the anode materials for SOFC，the products in the preparation process and in 5% H₂S-N₂ was studied thermodynamically. The results show that the products of NiO-SDC sintered at 800 ℃ and reduction at 850 ℃ were consistent with the results of thermodynamic analysis. Compared with the XRD spectrums of Ni-SDC before and after exposure in 5% H₂S-N₂ at 800 ℃ for 12 h，Ni was converted to NiS₂，which consented to the conclusion of thermodynamics. Compared with the Raman spectrums of Ni-SDC and SDC before and after exposure in 5% H₂S-N₂ at 800 ℃ for 12 h，a conclusion can be drawn that the main peaks is not changed but the intensity is diminished，the possible reason is the formation of Ce—O—S when the anode is exposed in a high concentration H₂S.

Key words: Ni-SDC, H₂S, thermodynamics, ceria, solid oxide fuel cell

摘要： 以Ni-SDC作为固体氧化物燃料电池（SOFC）的阳极，研究了该阳极粉末在制备过程中以及5% H2S-N2硫化后的产物，并用热力学软件绘制相图对其在各种温度下的产物变化进行分析。结果表明：NiO-SDC在800 ℃煅烧和在850 ℃还原的产物与热力学分析结果是一致的。对比在5%的H2S-N2中硫化12 h前后的XRD表明Ni已经转化为NiS2，热力学分析验证了该结论。比较Ni-SDC和SDC硫化前后的Raman光谱和XRD结果得到：SDC硫化后主峰型没有发生明显变化，但强度变弱，说明粒径变大，可能因为有Ce—O—S键生成。

关键词: Ni-SDC, H₂S, 热力学分析, 二氧化铈, 固体氧化物燃料电池