Influence of synthesis methods on microstructure of SrCoO3-d cathode for solid oxide fuel cells (SOFC)

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(Institution)
Abstract
13-009 Thaís de Oliveira Almeida Almeida, T.d.(Universidade Federal da Paraíba); Aquino, F.d.(Universidade Federal da Paraíba); da Silva, I.B.(Universidade Federal da Paraíba); Queiroz, D.F.(Universidade Federal da Paraíba); Aires, V.V.(Universidade Federal da Paraíba); Silva, F.F.(Universidade Federal da Paraíba); With focus on achieving sustainability in recent years, the research for renewable energy sources has intensified. Among those sources, the fuel cells, as electrochemical devices that transform chemical energy of certain fuels to electrical energy by redox reactions, have been disseminated as an important alternative. The solid oxide fuel cells (SOFC), especially when operating at intermediate temperatures (500 – 800 °C), gained attention for electrical energy production because of their capacity to be fed with reformed fuels (e. g. ethanol). In this work, a cathodic material, the strontium cobaltite (SrCoO3-d), was synthesized by the methods of co-precipitation, combustion (with urea) and gelatin. The synthesized powders were calcined at 1000 °C for 4 hours and will be characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). With the confirmed presence of perovskite structure and porosity required for their application, the films of SrCoO3-d will be deposited on gadolinium-doped ceria (Ce0.9Gd0.1O2-d) substrates by the screen-printing method, with posterior thermal treatment. At last, the films will be characterized by SEM to verify the influence of the different synthesis methods on deposition and microstructure of the studied cathodic material.
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