Direct carbon solid oxide fuel cell has garnered increasingly attention due to its high conversion efficiency. However, when a liquid metal is used as the anode, the electrolyte is subjected to hot corrosion by the liquid metal and its oxide. In the present study, both chemical and electrochemical corrosions of Gd₂O₃-doped CeO₂ electrolyte by liquid Sb and Sb₂O₃ are conducted at 750 °C for up to 100 h to simulate the situations occurring in the direct carbon solid oxide fuel cell. The tested specimens are characterized by a scanning electron microscope and an electron probe micro-analyzer. In the case of chemical corrosion, both liquid Sb and Sb₂O₃ penetrates into grain boundaries of the electrolyte, resulting spallation of grains from the bulk. The depth of liquid Sb penetration is deeper than that of liquid Sb₂O₃. Electrochemical corrosion of the electrolyte by liquid Sb occurs in the same way as the chemical corrosion at an increased rate promoted by applied current. It is also found that the electrochemical corrosion of the electrolyte by liquid Sb improves the cell performance with the sacrifice of electrolyte.

直接碳固体氧化物燃料电池由于其高转化效率而受到越来越多的关注。但是，当液态金属用作阳极时，电解质会受到液态金属及其氧化物的热腐蚀。在本研究中，液体Sb和Sb ₂ O ₃对Gd ₂ O ₃掺杂的CeO ₂电解质的化学和电化学腐蚀均在750°C下进行长达100 h，以模拟直接碳固体氧化物中发生的情况。燃料电池。通过扫描电子显微镜和电子探针显微分析仪对测试样品进行表征。在化学腐蚀的情况下，液体Sb和Sb ₂ O ₃渗透到电解质的晶界中，导致大块中的晶粒散裂。液体Sb的渗透深度比液体Sb ₂ O _3的渗透深度深。液体Sb对电解质的电化学腐蚀发生的方式与施加电流促进化学腐蚀的速率相同。还发现，液体Sb对电解质的电化学腐蚀在牺牲电解质的情况下改善了电池性能。