Reactivity at the Ln2NiO4+/electrolyte interface (Ln = La, Nd) studied by Electrochemical Impedance Spectroscopy and Transmission Electron Microscopy

La2NiO4+δ infiltrated into gadolinium doped ceria as novel solid oxide fuel cell cathodes: Electrochemical performance and impedance modelling

“…The third term of the Ruddlesden-Popper series La 4 Ni 3 O 10Àd appears in small proportion. The presence of this extra phase could come from the partial diffusion of the lanthanum cations into the GDC backbone during the annealing at 900 C, as lanthanum can easily substitute either cerium or gadolinium into the fluorite structure [12]. That will lead to a decrease of the La:Ni ratio in the infiltrated phase, deviating from the 2:1 stoichiometry needed to obtain the pure LNO phase.…”

A perspective on low-temperature solid oxide fuel cells

“…18c). 391,399 Although the reactivity is less between Nd 2 NiO 4+d and GDC, an amorphous interlayer still formed (Fig. 18d).…”

Electrochemical ageing study of mixed lanthanum/praseodymium nickelates La2-Pr NiO4+δ as oxygen electrodes for solid oxide fuel or electrolysis cells

“…occurs, but the extent of the decomposition is comparable in SOEC and SOFC modes and cannot account for the differences in electrochemical performances. The lanthanide nickelate electrodes, GDCBL and 8YSZ electrolytes are excellent SOFC/SOEC materials on their own; then, issues with their electrochemical performances most probably come from reactivity at their interfaces when stacked and exposed to high temperature [24,47,51].…”