Evaluation of Nd<sub>0.8−<i>x</i></sub>Sr<sub>0.2</sub>Ca<sub><i>x</i></sub>CoO<sub>3−<i>δ</i></sub>(<i>x</i> = 0, 0.05, 0.1, 0.15, 0.2) as a cathode material for intermediate-temperature solid oxide fuel cells
RSC advances