Nanostructured Lanthanum Manganate Composite Cathode

Anode-supported cells were fabricated with optimized cathodes showing high power density of 1.2 W/cm2 at 800°C under a cell voltage of 0.7 V and an active area of 4 4 cm. A microstructure study was performed on such cell using a field-emission gun scanning electron microscope, which revealed that the La1−xSrx yMnO3± LSM composite cathodes consist of a network of homogenously distributed LSM, yttria-stabilized zirconia YSZ , and pores. The individual grain size of LSM or YSZ is approximately 100 nm. The degree of contact between cathode and electrolyte is 39% on average. © 2005 The Electrochemical Society. DOI: 10.1149/1.2081890 All rights reserved.

[1]  Peter Vang Hendriksen,et al.  Effect of operational conditions on long-term stability of SOFCs , 2005 .

[2]  Mogens Bjerg Mogensen,et al.  Detailed characterization of anode supported SOFCs by impedance spectroscopy , 2005 .

[3]  Prabhakar Singh,et al.  Engineered cathodes for high performance SOFCs , 2003 .

[4]  J. Bentzen,et al.  Improvement of LSM cathode for high power density SOFCs , 2003 .

[5]  Nguyen Minh,et al.  Solid Oxide Fuel Cell Systems for Power Generation Applications , 2003 .

[6]  Peter Halvor Larsen,et al.  Long-term tests of DK-SOFC cells , 2003 .

[7]  S. Singhal,et al.  Solid oxide fuel cells VIII (SOFC VIII) : proceedings of the international symposium , 2003 .

[8]  S. Singhal.  Solid Oxide Fuel Cells , 2003 .

[9]  M. Mogensen,et al.  Effect of sintering temperature on microstructure and performance of LSM–YSZ composite cathodes , 2001 .

[10]  S. Singhal,et al.  Polarization Effects in Intermediate Temperature, Anode‐Supported Solid Oxide Fuel Cells , 1999 .

[11]  L. D. Jonghe,et al.  Reduced-Temperature Solid Oxide Fuel Cell Based on YSZ Thin-Film Electrolyte , 1997 .

[12]  H. Bouwmeester,et al.  Electrode Properties of Sr‐Doped LaMnO3 on Yttria‐Stabilized Zirconia I. Three‐Phase Boundary Area , 1997 .

[13]  L. Gauckler,et al.  Microstructure‐Property Relations of Solid Oxide Fuel Cell Cathodes and Current Collectors Cathodic Polarization and Ohmic Resistance , 1996 .

[14]  M. Mogensen,et al.  Manganite-zirconia composite cathodes for SOFC: Influence of structure and composition , 1995 .

[15]  M. Nishiya,et al.  LaMnO3 air cathodes containing ZrO2 electrolyte for high temperature solid oxide fuel cells , 1992 .