|
| Abstract No.: |
|
| Title: |
Liquid plasma sprayed La0.4S0.6Co0.2Fe0.8O3/Ce0.8Gd0.2O2composite cathodes for intermediate-temperature solid oxide fuel cells
|
|
| Authors: |
Chang-Jiu Li* / Xi'an Jiaotong University, P.R. China
Shan-Lin Zhang / State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, China
Cheng-Xin Li/ State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, China
Guan-Jun Yang/ State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, China
|
|
| Abstract: |
In the present study, we report the fabrication of a composite of La0.4S0.6Co0.2Fe0.8O3(LSCF) and Ce0.8Gd0.2O2(GDC) as a high-performance cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs) by plasma spraying using a suspension containing well dispersing nanosized GDC particles in a LSCF precursor nitrate solution. The effects of GDC concentration in the suspension on the phase composition, microstructure, and electrochemical performance of the resultant composite cathode were investigated. It was found that the composite cathode shows a fine and porous microstructure with nanosized GDC particles distributed uniformly in the LSCF backbone, and the GDC content in the final cathodes increased with the GDC concentration in the suspension. The electrochemical evaluation further indicated that the cathode polarization decreases with the GDC concentration increasing from 0 g L-1 to 15 g L-1, whereas a further increase of GDC concentration increased the cathode polarization instead as a results of increased size of GDC clusters and the reduced number of active sites. At 600 and 750 °C, the cathode prepared by the suspension with a GDC concentration of 15 g L-1 exhibited an impressive area specific polarization resistance of 0.12 and 0.0092 W cm2, respectively.
|
|