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- W4225384178 abstract "Novel perovskite-type A-site calcium-doped Nd1–xCaxBaCo2O5+δ oxides were studied in terms of oxygen electrode materials for reversible solid oxide cells (RSOCs). The electrode of x ≤ 0.2 was composed of a tetragonal perovskite structure with a P4/mmm space group. A Ca2+ dopant was used to improve the thermal expansion coefficient (TEC), conductivity, and electrochemical properties of the NdBaCo2O5+δ oxides, with TEC and conductivity values of Nd1–xCaxBaCo2O5+δ (x = 0–0.2) of 17.5–16.2 × 10−6 K−1 and 960.4–1068 S cm−1, respectively. The X-ray photoelectron spectroscopy results indicated that Ca2+ doping has a beneficial influence on the surface oxygen adsorption properties and the increase in the concentration of Co4+. On the basis of the first-principles density functional theory, doping with Ca2+ leads to easier oxygen release and uptake. The area specific resistance of the x = 0.2 electrode was 0.058 Ω cm2 at 700 °C, whereas at 800 °C, the cell using the x = 0.2 oxygen electrode exhibited a maximum power density of 740 mW cm−2 when H2 was used as the fuel, and the current density of the electrolytic pure CO2 at 1.5 V was 1.68 A cm−2. These attractive electrochemical properties suggest that Ca-based doping is an effective method for developing (reversible solid oxide cell) RSOC oxygen electrodes." @default.
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- W4225384178 date "2022-08-01" @default.
- W4225384178 modified "2023-10-15" @default.
- W4225384178 title "Investigation on Nd1–Ca BaCo2O5+δ double perovskite as new oxygen electrode materials for reversible solid oxide cells" @default.
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- W4225384178 doi "https://doi.org/10.1016/j.jallcom.2022.165245" @default.
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