TY - JOUR
T1 - TOF-SIMS characterization of impurity enrichment and redistribution in solid oxide electrolysis cells during operation
AU - Kiebach, Ragnar
AU - Norrman, Kion
AU - Chatzichristodoulou, Christodoulos
AU - Chen, Ming
AU - Sun, Xiufu
AU - Ebbesen, Sune D.
AU - Mogensen, Mogens B.
AU - Hendriksen, Peter Vang
PY - 2014/9/23
Y1 - 2014/9/23
N2 - TOF-SIMS analyses of state-of-the-art high temperature solid oxide electrolysis cells before and after testing under different operating conditions were performed. The investigated cells consist of an yttria stabilized zirconia (YSZ) electrolyte, a La1−xSrxMnO3−Δ composite anode and a Ni-YSZ cermet cathode. The surfaces and cross-sections of the cells were analyzed, and several elemental impurities like Si, Ca and Na were identified and spatially mapped and their enrichment and migration during operation is reported. With advancing operation time, the concentration of these elements, especially Na and Ca, increases. For Si, a concentration gradient is found from the gas inlet to the gas outlet. Additionally, a loss of Ni percolation in the active cathode is observed in the same area where the Si enrichment is found. Based on the obtained TOF-SIMS results, the influence of the operating conditions on degradation is discussed.
AB - TOF-SIMS analyses of state-of-the-art high temperature solid oxide electrolysis cells before and after testing under different operating conditions were performed. The investigated cells consist of an yttria stabilized zirconia (YSZ) electrolyte, a La1−xSrxMnO3−Δ composite anode and a Ni-YSZ cermet cathode. The surfaces and cross-sections of the cells were analyzed, and several elemental impurities like Si, Ca and Na were identified and spatially mapped and their enrichment and migration during operation is reported. With advancing operation time, the concentration of these elements, especially Na and Ca, increases. For Si, a concentration gradient is found from the gas inlet to the gas outlet. Additionally, a loss of Ni percolation in the active cathode is observed in the same area where the Si enrichment is found. Based on the obtained TOF-SIMS results, the influence of the operating conditions on degradation is discussed.
UR - https://www.scopus.com/pages/publications/84907919333
U2 - 10.1039/c4dt01053a
DO - 10.1039/c4dt01053a
M3 - Article
AN - SCOPUS:84907919333
SN - 1472-7773
VL - 43
SP - 14949
EP - 14958
JO - Journal of the Chemical Society, Dalton Transactions
JF - Journal of the Chemical Society, Dalton Transactions
IS - 40
ER -