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AKE: Arbeitskreis Energie

AKE 5: Nanotechnologies for Energy Applications

AKE 5.3: Vortrag

Montag, 26. März 2012, 12:15–12:30, A 151

Nanostructured thin film La_0.6Sr_0.4CoO_3−δ synthesized via salt-assisted spray pyrolysis for micro-SOFC application — •Cahit Benel^1,2,3, Azad J. Darbandi^1,2,3, Anna Evans⁴, René Tölke⁴, and Horst Hahn^1,2 — ¹Institute for Nanotechnology, Karlsruhe Institute of Technology, Germany — ²Joint Research Laboratory Nanomaterials/Technische Universität Darmstadt and Karlsruhe Institute of Technology, Germany — ³Center for Functional Nanostructures, Karlsruhe Institute of Technology, Germany — ⁴Nonmetallic Inorganic Materials, Department of Materials, ETH Zurich, Switzerland

Micro-solid oxide fuel cells (micro-SOFCs) are anticipated for battery replacement due to their increased energy capacity for applications such as portable electronic devices, mobile phones and laptops. In this work, nanocrystalline La_0.6Sr_0.4CoO_3−δ (LSC) powder with ultrafine microstructure and high specific surface area was synthesized via salt-assisted spray pyrolysis method. XRD results show the formation of a nanocrystalline single phase perovskite structure. Agglomerate-free LSC nanoparticles were stabilized in water-based dispersion without the need of ultrasonic energy application. Nanoparticulate cathode thin films of LSC with thickness between 150 and 500 nm were prepared via single step spin coating on yttria stabilized zirconia (YSZ) substrates. Gadolinium doped ceria (GDC) film was applied to YSZ substrate to avoid the chemical reaction between cathode and electrolyte. The performance of the thin film cathodes was evaluated by high temperature impedance spectroscopy on symmetrical samples.