Enhancing plasma sprayed LSCF cathode performance by infiltration method

Wednesday, May 13, 2015: 8:40 AM
Room 101A (Long Beach Convention and Entertainment Center)
Ms. Ying Li , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
Prof. Cheng-Xin Li , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
Dr. Shan-Lin Zhang , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
Prof. Guan-Jun Yang , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
Prof. Chang-Jiu Li , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
LSCF(La0.6Sr0.4Co0.2Fe0.8O3) has been widely studied as cathode materials for intermediate solid oxide fuel cell(SOFC) due to its high ionic and electronic conductivity. However, LSCF cathode is likely to be limited by the surface catalytic properties and long term stability. Sr and Co may segregate from LSCF under cathode polarization, leading to increased resistance of the cathode. Oxygen hyperstoichiometric La2NiO4+δ with a K2NiF4 structure possess a higher catalytic properties, ionic conductivity and stability compared to LSCF cathode. Considering both the advantages and disadvantages of the two different cathode materials, it is a possible way to enhance the LSCF cathode performance by infiltrating a thin film of La2NiO4+δ on the porous LSCF. In this study, the LSCF cathode was deposited by atmospheric plasma spray. The porous LSCF cathode was infiltrated by La2NiO4+δ. The microstructure was characterized by SEM and TEM. The effect of infiltration on the polarization of LSCF cathode was investigated.
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See more of: Thermal Spray Applications