TY - GEN
T1 - Chemical degradation and poisoning mechanism of cermet anodes in solid oxide fuel cells
AU - Haga, K.
AU - Shiratori, Y.
AU - Ito, K.
AU - Sasaki, K.
PY - 2009
Y1 - 2009
N2 - This paper reports the chemical degradation of Ni-based SOFC anodes caused by small amounts of impurities supplied with fuels. In particular, the impurity dependence of degradation behaviors as well as poisoning mechanisms are highlighted and investigated. Poisoning effects by chlorine and siloxanes are found to be critical to achieve satisfactory SOFC durability. In addition, it has also been demonstrated that phosphorus and boron compounds lead to gradual decrease in cell voltage, Ni grain growth, and even formation of nickel phosphates. The measured trends are discussed in relation to the thermochemical calculations and FESEM/STEM-EDX analysis.
AB - This paper reports the chemical degradation of Ni-based SOFC anodes caused by small amounts of impurities supplied with fuels. In particular, the impurity dependence of degradation behaviors as well as poisoning mechanisms are highlighted and investigated. Poisoning effects by chlorine and siloxanes are found to be critical to achieve satisfactory SOFC durability. In addition, it has also been demonstrated that phosphorus and boron compounds lead to gradual decrease in cell voltage, Ni grain growth, and even formation of nickel phosphates. The measured trends are discussed in relation to the thermochemical calculations and FESEM/STEM-EDX analysis.
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U2 - 10.1149/1.3205748
DO - 10.1149/1.3205748
M3 - Conference contribution
AN - SCOPUS:77649151210
SN - 9781566777391
T3 - ECS Transactions
SP - 2031
EP - 2038
BT - ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
T2 - 11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
Y2 - 4 October 2009 through 9 October 2009
ER -