Effect of SO2 on the Performance of LSCF Cathode

Run Ru Liu; De Jun Wang; Leng Jing

doi:10.4028/www.scientific.net/AMR.902.41

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 902Effect of SO2 on the Performance of LSCF Cathode

Effect of SO₂ on the Performance of LSCF Cathode

Abstract:

Sulfur poisoning effect on the electrochemical performance and long-term durability of SOFC cathode has been investigated for La_0.6Sr_0.4Co_0.2Fe_0.8O₃ (LSCF) by Galvanic Current Interruption (GCI) technology. Cell performance was measured supplying with SO₂-containing air to the cathode under a constant current density of 200 mA cm^-2. At 800 °C, LSCF cathode showed low tolerance to the sulfur poisoning. SO₂ tends to react with strontium in LSCF material resulting in the formation of SrSO₄ in the cathode. This reaction gave rise to microstructural change in the cathode and caused gradual degradation of cell performance.

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Periodical:

Advanced Materials Research (Volume 902)

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41-44

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.902.41

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Online since:

February 2014

Authors:

Run Ru Liu*, De Jun Wang, Leng Jing

Keywords:

Degradation, GCI, LSCF Cathode, SOFC

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