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Enhanced Cr-tolerance of an SOFC cathode by an efficient electro-catalyst coating by Kai Pei; Yucun Zhou; Kang Xu; Zuyun He; Yan Chen; Weilin Zhang; Seonyoung Yoo; Bote Zhao; Wei Yuan; Meilin Liu; Yu Chen is a Engineering article available to read on EtoBox.
What is Enhanced Cr-tolerance of an SOFC cathode by an efficient electro-catalyst coating about?
The durability and electro-catalytic activity for oxygen reduction reaction (ORR) of solid oxide fuel cells (SOFCs) cathode often suffer from severe degradation due to poisoning effects such as Cr from interconnectors. Here we report our findings in the development of a Cr-tolerant catalyst, BaCoO 3-x (BCO) nano-particles, which can dramatically enhance the ORR activity and durability of a state-of-the-art La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-x (LSCF) cathode exposed to Cr. For example, the polarization resistance (R p ) of bare LSCF cathode increases from ~0.4 to ~1.5 Ωcm 2 after 100hs exposure to Cr in air with 3%H 2 O at 750 o C. In contrast, R p of a BCO-coated LSCF cathode remains to be ~0.05 Ω cm 2 under the same condition, suggesting that BCO is catalytically active to ORR but inert to Cr-poisoning. At 700 o C, the single cells with BCO-LSCF cathode show an excellent peak power density of ~0.514Wcm -2 and significantly enhanced durability (degradation rate of 0.086%h -1 at 0.8V), much better than those of cells with a bare LSCF cathode (~0.448 Wcm -2 and degradation rate of 0.31%h -1 at 0.8V). Raman analysis indicated that the presence of the BCO catalyst coating greatly reduced
Who reads Enhanced Cr-tolerance of an SOFC cathode by an efficient electro-catalyst coating?
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- Author
- Kai Pei; Yucun Zhou; Kang Xu; Zuyun He; Yan Chen; Weilin Zhang; Seonyoung Yoo; Bote Zhao; Wei Yuan; Meilin Liu; Yu Chen
- Published
- 2020
- Language
- EN
- Field
- Engineering (Physical Sciences)