Preparation of La2-x Sr x NiO4 (x = 0-1.3) conducting oxides via a citrate route

Electrical and Electrochemical Properties of La2NiO4+δ-Based Cathodes in Contact with Ce0.8Sm0.2O2-δ Electrolyte

“…Among the materials investigated, La 2 NiO 4+δ (LNO) was found to possess the highest value of the oxygen surface heteroexchange constant k, which is higher by one or two orders of magnitude than that for the best mixed conductors with perovskite structure, but its performance as a cathode is limited by its electronic conductivity [4]. The last mentioned can be increased, particularly, by appropriate doping on the A-site with Sr 2+ or Ca 2+ , what have been shown in some works, presented by different scientific groups [5][6][7]. Alternatively, the fabrication of functionally graded electrodes is being developed as a means to improve of their electrochemical activity [8,9].…”

Thermal Analysis

“…The application of thermal analysis in combination with XRD and FT-IR shows (81) that the thermal decomposition of a mixture of barium carbonate and tin tetrahydroxide results in the formation barium stannate that has a cubic perovskite structure and can be used as a sensor for the detection of liquefied petroleum gas. Tolochko et al (82) compare citrate and ceramic routes for preparation of La 2-x Sr x NiO 4 conducting oxide. The use of citrate mixtures leads to fine powders and dense ceramics; it also reduces the temperature by 150-200 °C as measured by TGA-DTA.…”