LSM-YSZ composite electrodes are prepared from a mixture of YSZ and LSM particles. Commercial YSZ particles were mixed with polymerizable complex method-driven LSM powders of two different particle sizes, 81 and 210 nm. The correlations between sintering temperature, microstructure and performance of composite cathode have been studied. It was found that optimum sintering temperature differs depending upon the LSM particle size. The composite cathode derived from finer LSM particles displayed lowest polarization resistance ∼0.46 Ωcm2 when sintered at 1100°C, whereas the same resistance was observed for the electrode involving larger LSM sintered at 1200°C. The microstructural changes evolved during the course of sintering and the resulting electrodes were investigated by scanning electron microscopy and impedance spectroscopy.
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Acknowledgment This work was supported by the Core technology Development Program for Fuel Cell of Ministry of Science and Technology and Korea Institute of Science and Technology Evaluation and Planning. It was also partially supported by the National Research Laboratory (NRL) Program of Korea Science and Engineering Foundation.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Mechanics of Materials
- Electrical and Electronic Engineering
- Materials Chemistry