Cr Poisoning On Nd2Ni0.95Cu0.05O4+δ Cathode for Solid Oxide Fuel Cells

Abstract

In this study, Nd2Ni1-xCuxO4+δ (x=0, 0.05, 0.1, and 0.2) layered perovskite powders were synthesized by the glycine nitrate process (GNP) and the chromium poisoning effect on the electrochemical performance of the Nd2Ni0.95Cu0.05O4+δ and La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes were investigated. In the case of the LSCF cathode, the strontium chromite phase formed after the exposure of the gaseous chromium species, while there was no additional phase in the Nd2Ni0.95Cu0.05O4+δ cathode. The area specific resistance (ASR) of the Nd2Ni0.95Cu0.05O4+δ cathode did not change significantly after the exposure of the gaseous chromium species at 800°C.

Long-Term Stability of Pr2NiO4+δ Air Electrodes for Solid Oxide Cells against Chromium Poisoning

“…So far, several Cr-poisoning studies on rare-earth nickelates have been published for La 2 NiO 4+δ [10][11][12][13][14][15][16][17][18] and Nd 2 NiO 4+δ . [19][20][21][22][23] However, no such studies are available for Pr 2 NiO 4+δ , which is quite surprising, considering that Pr-nickelates show very high performance as SOEC/SOFC air electrodes matching current state-of-the-art materials like LSCF. 24,25 In this work, the long-term stability of Pr 2 NiO 4+δ (PNO) as SOEC/SOFC air electrode is investigated at 800 °C.…”

A review of Solid Oxide Fuel Cell cathode materials with respect to their resistance to the effects of chromium poisoning

“…Choe et al[244] built upon the earlier work on the Nd 2 NiO 4 material, by analysing the effect of copper-doping (Nd 2 Ni 1-x Cu x O 4+δ ). Finding that the lowest ASR and polarisation resistance could be achieved with a Cu content of x=0.05, the authors then analysed the effects of chromium poisoning in comparison with that of LSCF.…”