Performance of solid oxide fuel cells based on proton-conducting BaCe0.7In0.3-xYxO3-δ electrolyte

The performances of solid oxide fuel cells with proton conductors BaCe0.7In0.3−xYxO3−δ (BCIY, x = 0, 0.1, 0.2, 0.3) as electrolytes were investigated in this work. The cell based on BaCe0.7In0.2Y0.1O3−δ electrolyte showed maximum power outputs of 0.114, 0.204 and 0.269 Wcm−2 at 600, 650 and 700 °C, respectively. After operating at a constant cell voltage output of 0.5V for 40h, no obvious degradation in performance was observed for the cells based on BaCe0.7In0.3O3−δ and BaCe0.7In0.2Y0.1O3−δ electrolytes. However, although relatively lower resistances and higher initial power outputs were found for cells based on BaCe0.7In0.1Y0.2O3−δ and BaCe0.7Y0.3O3−δ electrolytes, rapid cell performance degradations were observed for these two cells. The stability under cell operating conditions remained a challenge for cells using BaCe0.7In0.1Y0.2O3−δ and BaCe0.7Y0.3O3−δ electrolytes.