La ₄ Ni ₃ O 10−δ as an efficient solid oxide fuel cell cathode: electrochemical properties versus microstructure

The higher-order Ruddlesden–Popper phase La ₄ Ni ₃ O 10−δ is prepared for the first time by electrostatic spray deposition (ESD) on a CGO (Ce 0.9 Gd 0.1 O 2−δ ) electrolyte and evaluated as an intermediate temperature solid oxide fuel cell cathode showing an R pol value as low as 0.30 Ω cm ² at 700 °C.