Performance of Cobaltite Solid-Oxide Fuel Cell Cathodes with different nano/microstructure

A. SERQUIS; L. BAQUÉ; N. GRUNBAUM; M. S. MORENO; J. S. YOON; R. ARAUJO; X. ZHANG; H. WANG; A. CANEIRO

Miramare, Trieste, Italia

Conferencia; Conference on “From Physical Understanding to Novel Architectures of Fuel Cells”; 2007

, ICTP (Abdus Salam International Centre for Theoretical Physics)

The La1-xSrxCo1-yFeyO3-d (cobaltite) are good candidates for solid oxide fuel cell (SOFC) cathodes because these materials present high ionic and electronic conductivity, and compatibility with Cerium Gadolinium Oxide (CGO) electrolytes allowing a lower temperature of operation [1,2]. Most of reported cobaltite films have been deposited by slurry deposition techniques such as spraying [3], painting [4], or spin coating [5]. In order to further increase SOFC performance, it is necessary to understand how the microstructure of the composites electrodes affects the performance of the system. The aim of this work is to study the microstructure and electrode resistance of porous electrodes of the same composition films, i.e. La0.4Sr0.6Co0.8Fe0.2O3-d (LSCFO), deposited by different methods and to identify the sintering conditions to obtain low cathode overpotential values.