High Cu content LaNi1-xCuxO3-δ perovskites as candidate air electrode materials for Reversible Solid Oxide Cells

Efficient and Economically Favorable Co-Free Air Electrodes for Solid Oxide Cells

“…The refined crystal structure parameters are similar, with differences below 0.0005 Å to the one presented in the ref. 20, which confirms the reproducibility of the proposed synthesis method.…”

“…Air electrode paste based on the LaNi0.5Cu0.5O3-δ and terpineol with other additives (binder and plasticizer) was manually screen-printed on the half cells (air electrode area 16 cm 2 ), which were in the next step annealed at 800 °C for 2 hours in the air (sintering condition analogous to the presented in the ref. 20).…”

“…A promising alternative to Co-based air electrode materials considering physicochemical properties, raw materials accessibility, relatively even distribution of their resources, and moderate price fluctuations, seems to be Ni-Cu-based perovskites. Parent compositions, namely LaNiO3 and LaCuO3, exhibit a set of properties making them an attractive candidate for the electrochemical cells (17)(18)(19)(20). LaNiO3-δ oxides which properties are strongly dependent on the oxygen nonstoichiometry δ, are one of the best catalysts for oxidation and reduction of oxygen at room temperature.…”

“…LaNiO3-δ oxides which properties are strongly dependent on the oxygen nonstoichiometry δ, are one of the best catalysts for oxidation and reduction of oxygen at room temperature. In addition to that, the catalytic properties are also observed at a high temperature which makes it possible to use these materials in methane reforming processes, hydrocarbon oxidation, photocatalytic systems, and other applications (19,20). Stoichiometric LaCuO3 demonstrates exceptionally high electrical conductivity which reaches 10 6 S cm -1 .…”

“…Presented in the ref. 20 with the aforementioned oxide were prepared and electrochemically tested in electrolysis or/and in the reversible mode in the 700-800 °C temperature range. Also, results related to the chemical compatibility between mentioned oxides and a commonly used buffer layer CGO (Ce0.9Gd0.1O1.9) is presented in this work.…”