High-Temperature Behavior, Oxygen Transport Properties, and Electrochemical Performance of Cu-Substituted Nd1.6Ca0.4NiO4+? Electrode Materials

In this study, Nd1.6Ca0.4Ni1?yCuyO4+?-based electrode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs) are investigated. Materials of the series (y = 0–0.4) obtained by pyrolysis glycerol-nitrate compositions. The study crystal structure and high-temperature stability in air under low oxygen partial pressure atmospheres performed using high-resolution neutron situ X-ray powder diffraction. All samples assume a with Bmab sp.gr. below 350 °C I4/mmm above 500 °C. A transition volume thermal expansion coefficient values from 7.8–9.3 to 9.1–12.0 × 10?6, K?1 is observed at approximately 400 helium.The self-diffusion values, isotope exchange, monotonically decrease Cu content increasing, while concentration dependence charge carriers goes through maximum x 0.2. Nd1.6Ca0.4Ni0.8Cu0.2O4+? materialdemonstrates chemical compatibility superior electrochemical performance symmetrical Ce0.8Sm0.2O1.9, BaCe0.8Sm0.2O3??, BaCe0.8Gd0.19Cu0.1O3?? BaCe0.5Zr0.3Y0.1Yb0.1O3?? electrolytes, potentially application IT-SOFCs.