Synthesis and characterization La0.6Sr0.4CoO3 and La0.6Sr0.4Co0.2Fe0.8O3 nanotubes for cathode of solid-oxide fuel cells

JOAQUIN SACANELL; MARTÍN BELLINO,; DIEGO LAMAS,; ANA GABRIELA LEYVA

PHYSICA B - CONDENSED MATTER

ELSEVIER SCIENCE BV

Año: 2007 vol. 398 p. 341 - 343

0921-4526

Perovskite-type mixed oxides, such as La1xSrxCo1yFeyO3 compounds, are at the present time one of the most widely used materials for cathode of intermediate temperature solid-oxide fuel cells (SOFCs). A significant increase of the specific area of the cathode can be achieved by preparing structures on the nanometric scale. In this work, nanocrystalline tubular structures of La0.6Sr0.4CoO3 and La0.6Sr0.4Co0.2Fe0.8O3 were synthesized by denitration, using polycarbonate porous templates, microwave irradiation and a further calcination at 800 1C. The shape and size of the tubes are determined by the characteristics of the template pores. The final thermal treatment is needed to obtain the desired perosvkite-type crystal structure. The resulting products were studied by means of X-ray diffraction and electron microscopy techniques.1xSrxCo1yFeyO3 compounds, are at the present time one of the most widely used materials for cathode of intermediate temperature solid-oxide fuel cells (SOFCs). A significant increase of the specific area of the cathode can be achieved by preparing structures on the nanometric scale. In this work, nanocrystalline tubular structures of La0.6Sr0.4CoO3 and La0.6Sr0.4Co0.2Fe0.8O3 were synthesized by denitration, using polycarbonate porous templates, microwave irradiation and a further calcination at 800 1C. The shape and size of the tubes are determined by the characteristics of the template pores. The final thermal treatment is needed to obtain the desired perosvkite-type crystal structure. The resulting products were studied by means of X-ray diffraction and electron microscopy techniques.0.6Sr0.4CoO3 and La0.6Sr0.4Co0.2Fe0.8O3 were synthesized by denitration, using polycarbonate porous templates, microwave irradiation and a further calcination at 800 1C. The shape and size of the tubes are determined by the characteristics of the template pores. The final thermal treatment is needed to obtain the desired perosvkite-type crystal structure. The resulting products were studied by means of X-ray diffraction and electron microscopy techniques.0.6Sr0.4Co0.2Fe0.8O3 were synthesized by denitration, using polycarbonate porous templates, microwave irradiation and a further calcination at 800 1C. The shape and size of the tubes are determined by the characteristics of the template pores. The final thermal treatment is needed to obtain the desired perosvkite-type crystal structure. The resulting products were studied by means of X-ray diffraction and electron microscopy techniques.1C. The shape and size of the tubes are determined by the characteristics of the template pores. The final thermal treatment is needed to obtain the desired perosvkite-type crystal structure. The resulting products were studied by means of X-ray diffraction and electron microscopy techniques.