Strontium And Iron Substituted Lanthanum Nickelate As Cathode Material In Solid Oxide Fuel Cells
The MIEC La1.5Sr0.5Ni1-yFeyO4 (y=0.1-0.4) oxides have been studied as cathode materials with La0.88Sr0.12Ga0.82Mg0.18O3-δ (LSGM) electrolyte. Total conductivity, thermal expansion, oxygen nonstoichiometry, and chemical compatibility with LSGM and Ce0.8Sm0.2O1.9 (SDC) were determined. The following fuel cells were tested: La1.5Sr0.5Ni1-yFeyO4 (y=0.1, 0.2, 0.3, 0.4)/SDC/LSGM/Sr2N0.75Mg0.25MoO6 (SNMM) and La1.5Sr0.5Ni0.6Fe0.4O4/SDC/LSGM/SDC/NiO-SDC. For the former, the maximum power densities were 218, 274, 222, and 390 mW/cm2 at 850 °C in case of y equal to 0.1, 0.2, 0.3, and 0.4, respectively. The latter cell showed maximum power density of 341 mW/cm2 at 850°C.
 S. Yoo, S. Choi, J. Shin, M. Liu, and G. Kim, Electrical properties, thermodynamic behavior, and defect analysis of La n+1Ni nO 3n+1+δ infiltrated into YSZ scaffolds as cathodes for intermediate temperature SOFCs, RSC Advances, 2, no. 11, 4648–4655, (2012).
 A. Montenegro-Hernández, J. Vega-Castillo, L. Mogni, and A. Caneiro, Thermal stability of Ln2NiO4+δ (Ln: La, Pr, Nd) and their chemical compatibility with YSZ and CGO solid electrolytes, International Journal of Hydrogen Energy, 36, no. 24, 15704–15714, (2011).
 N. Solak, M. Zinkevich, and F. Aldinger, Compatibility of La2NiO4 cathodes with LaGaO3 electrolytes: A computational approach, Solid State Ionics, 177, no. 19-25, 2139–2142, (2006).
 A. Aguadero, M. J. Escudero, M. Pérez, J. A. Alonso, V. Pomjakushin, and L. Daza, Effect of Sr content on the crystal structure and electrical properties of the system La2-xSrxNiO4+δ (0 ≤ x ≤ 1), Dalton Transactions, no. 36, 4377–4383, (2006).
 L. V. Makhnach, V. V. Pankov, and P. Strobel, High-temperature oxygen non-stoichiometry, conductivity and structure in strontium-rich nickelates La2-xSrxNiO4-δ (x = 1 and 1.4), Materials Chemistry and Physics, 111, no. 1, 125–130, (2008).
 Y. Takeda, R. Kanno, M. Sakano, O. Yamamoto, M. Takano, Y. Bando, H. Akinaga, K. Takita, and J. B. Goodenough, Crystal chemistry and physical properties of La2-xSrxNiO4 (0 ≤ x ≤ 1.6), Materials Research Bulletin, 25, no. 3, 293–306, (1990).
 R. Benloucif, N. Nguyen, J. M. Greneche, and B. Raveau, La2-xSrxNi1-yFeyO4-[ (x-y) 2]+δ: Relationships between oxygen non-stoichiometry and magnetic and electron transport properties, Journal of Physics and Chemistry of Solids, 52, no. 2, 381–387, (1991).
 V. V. Kharton, A. V. Kovalevsky, M. Avdeev, E. V. Tsipis, M. V. Patrakeev, A. A. Yaremchenko, E. N. Naumovich, and J. R. Frade, Chemically induced expansion of La2NiO4+δ-based materials, Chemistry of Materials, 19, no. 8, 2027–2033, (2007).
 A. R. Gilev, E. A. Kiselev, and V. A. Cherepanov, Synthesis, oxygen nonstoichiometry and total conductivity of (La,Sr)2 (Mn,Ni)O4±