. . . . . . . . . .    ANM 2010     3rd International Conference on Advanced Nano Materials     12-15 September 2010 - Agadir, Morocco Back    Abstract ANMM164 DIRECT SYNTHESIS OF CATHODE NANOPARTICLES FOR SOLID OXIDE FUEL CELL APPLICATIONS Deepu J. Babu 1,2, Azad J. Darbandi 2,3, Jens Suffnerb,3, S.S. Bhattacharya 1 and Horst Hahn 2,3 a Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India. b Joint Research Laboratory Nanomaterials, Technische Universität Darmstadt and Karlsruhe Institute of Technology, 64287 Darmstadt, Germany c Institute for Nanotechnology, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany . Conventional methods for the preparation of solid oxide fuel cell (SOFC) cathode materials lead to particles in the micrometer range which possess low specific surface area and require high sintering temperatures. Nanoparticles have been identified as beneficial for enhancing the electrode performance by increasing specific surface area, thus providing larger TPB (Three Phase Boundary) area and consequently lower polarization resistance. Recently, a multi step approach for synthesis and preparation of cathode nanoparticles was presented. The current work represents a single step synthesis of cathode nanoparticles via an up-scalable method. Single phase nanocrystalline La0.75Sr0.2MnO3-δ (LSM) particles (20 nm in size) with high specific surface area (60-100 m2 g-1) were synthesized via flame spray pyrolysis and characterized by high temperature X-ray diffraction (HTXRD), nitrogen adsorption, high resolution scanning electron microscopy (HRSEM) and transmission electron microscopy (TEM). High temperature impedance spectroscopy measurements were carried out on nanoparticulate cathode films derived from the synthesized nanopowders and promising low area specific resistances were observed. . © nanoAC . . . . . . . . . .

.