Comparison of the Electrochemical Performances of Solid Oxide Fuel Cells with Sputtered Thin Barrier Layers Fueled by Hydrogen or Ammonia

We investigated the influence of a fuel change from pure hydrogen to hydrogen–ammonia mixture at different percentages on electrochemical behavior 50 mm in diameter Solid Oxide Fuel Cells (SOFCs) with sputtered thin buffer layers Gd-doped ceria, varying working temperatures 800 °C 650 °C. The results show that performances cells are not affected by for high (800 and 750 °C). As an example, power density value 802 mW∙cm−2 1 A∙cm−2 is found when directly feeding cell 8 NmL∙min−1cm−2 ammonia equivalent flowrate 12 H2. These output values higher than those obtained industrial state-of-art (SoA) SOFCs screen-printed fed flowrates, thanks improved case ceria. At lower (700 °C), slight changes observed. Nevertheless, this temperature range, we also obtain current 0.54 NmL min−1cm−2 mV 700 °C, equal observed SoA button GDC barrier layer fueled 16 pave way towards use innovative SOFC structures ammonia.