Sulfur poisoning of La(Ni0.6Fe0.4)O-3 cathode material for solid oxide fuel cells
Sulfur poisoning of La(Ni0.6Fe0.4)O-3 cathode material for solid oxide fuel cells
复制标题
固体氧化物燃料电池正极材料La(Ni0.6Fe0.4)O-3的硫中毒
DOI：
10.1016/j.ijhydene.2021.07.175
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发表时间：
2021
影响因子：
7.2
通讯作者：
Brito Manuel E.
中科院分区：
文献类型：
--
作者：
Wang Fangfang;Yang QuanSen;Wang Huining;Zhang Zixin;Brito Manuel E.
Sulfur poisoning of cathode materials is one of the important factors to cause cathode performance degradation resulting in shortening lifetime of SOFC. The sulfur attacks alkali earth components of the rare earth-transition metal perovskite oxides, such as Ba, Ca, Sr, which reacts with SO2to form sulfates. In this work, the La(Ni0.6Fe0.4)O3(LNF) cathode material without alkali earth elements was employed to investigate the sulfur poisoning behavior by flowing 30 ppm SO2at different temperatures of 500 °C–800 °C. It was found that SO2readily reacts with the La2O3component in LNF to form La2O2SO4at 700 °C and 800 °C. The extent of the chemical reaction is temperature dependent. These results confirm that sulfur poisoning also occurs in cathode materials free of alkali earth components. The study prompts the exploration of new materials and new strategies for the developing new cathode materials with high sulfur tolerance.
