Hauptseite > Publikationsdatenbank > La2Ni1-xCoxO4þδ (x ¼ 0.0, 0.1 and 0.2) based efficient oxygen electrode materials for solid oxide electrolysis cells > print

001     865890
005     20240712112835.0
024 7 _ |a 10.1016/j.jpowsour.2019.227292
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024 7 _ |a 0378-7753
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024 7 _ |a 1873-2755
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024 7 _ |a 2128/23139
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037 _ _ |a FZJ-2019-05169
041 _ _ |a English
082 _ _ |a 620
100 1 _ |a Vibhu, V.
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245 _ _ |a La2Ni1-xCoxO4þδ (x ¼ 0.0, 0.1 and 0.2) based efficient oxygen electrode materials for solid oxide electrolysis cells
260 _ _ |a New York, NY [u.a.]
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520 _ _ |a The present study is focused on the development of alternative oxygen electrodes for Solid Oxide Electrolysis Cells (SOECs). Rare earth nickelates with general formula Ln2NiO4+δ (Ln = La, Pr or Nd) have shown good performance as oxygen electrodes with various electrolytes. Among them, La2NiO4+δ is most stable nickelate by itself however its electrochemical performance is lower compare to Pr2NiO4+δ. Therefore, to further enhance the physico-chemical properties, electrochemical performance of La2NiO4+δ as SOECs oxygen electrode, herein, we have performed the substitution of nickel with cobalt. Three compositions (x = 0.0, 0.1 and 0.2) were mainly considered and completely characterized using several techniques. The symmetrical as well as single cells were then prepared and electrochemically characterized using DC- and AC-techniques in the temperature range 700–900 °C. The electrode reaction mechanism was also investigated by recording the impedance spectra at different pO2. With cobalt substitution, an improvement in electrochemical performance as well lower degradation rate is observed during long term SOEC operation at −1 A⋅cm−2 current density at 800 °C with 50% H2 and 50% H2O feed gas mixture.
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700 1 _ |a Vinke, I. C.
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700 1 _ |a Eichel, Rüdiger-A.
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700 1 _ |a Bassat, J.-M.
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700 1 _ |a de Haart, L. G. J.
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773 _ _ |a 10.1016/j.jpowsour.2019.227292
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