TY - JOUR
T1 - Electrochemical characterisation of solid oxide cell electrodes for hydrogen production
AU - Bernuy-Lopez, Carlos
AU - Knibbe, Ruth
AU - He, Zeming
AU - Mao, Xiaojian
AU - Hauch, Anne
AU - Nielsen, Karsten Agersted
PY - 2011
Y1 - 2011
N2 - Oxygen electrodes and steam electrodes are designed and tested to develop improved solid oxide electrolysis cells for H2 production with the cell support on the oxygen electrode. The electrode performance is evaluated by impedance spectroscopy testing of symmetric cells at open circuit voltage (OCV) in a one-atmosphere set-up. For the oxygen electrode, nano-structured La0.75Sr0.25MnO3 (LSM25) is impregnated into a LSM25/yttria stabilised zirconia (YSZ) composite, whereas for the steam electrode, nano-structured Ni and Ce0.8Gd0.2O2−δ (CGO) is impregnated into a Sr0.94Ti0.9Nb0.10O3−δ (STN) backbone. In the present study, the best performing oxygen electrode is a LSM25-YSZ composite with 20% porosity and impregnated with a LSM25 solution measuring a polarisation resistance (Rp) of 0.12 Ω cm2 at 850 °C in oxygen. For the steam electrode, the best performance is obtained for a STN backbone, sintered at 1200 °C and impregnated with CGO/Ni, with an Rp of 0.08 Ω cm2 at 850 °C in 3% H2O/H2.
AB - Oxygen electrodes and steam electrodes are designed and tested to develop improved solid oxide electrolysis cells for H2 production with the cell support on the oxygen electrode. The electrode performance is evaluated by impedance spectroscopy testing of symmetric cells at open circuit voltage (OCV) in a one-atmosphere set-up. For the oxygen electrode, nano-structured La0.75Sr0.25MnO3 (LSM25) is impregnated into a LSM25/yttria stabilised zirconia (YSZ) composite, whereas for the steam electrode, nano-structured Ni and Ce0.8Gd0.2O2−δ (CGO) is impregnated into a Sr0.94Ti0.9Nb0.10O3−δ (STN) backbone. In the present study, the best performing oxygen electrode is a LSM25-YSZ composite with 20% porosity and impregnated with a LSM25 solution measuring a polarisation resistance (Rp) of 0.12 Ω cm2 at 850 °C in oxygen. For the steam electrode, the best performance is obtained for a STN backbone, sintered at 1200 °C and impregnated with CGO/Ni, with an Rp of 0.08 Ω cm2 at 850 °C in 3% H2O/H2.
KW - Solid Oxide Fuel Cells
KW - Fuel Cells and Hydrogen
KW - Brændselsceller og brint
U2 - 10.1016/j.jpowsour.2010.10.102
DO - 10.1016/j.jpowsour.2010.10.102
M3 - Journal article
SN - 0378-7753
VL - 196
SP - 4396
EP - 4403
JO - Journal of Power Sources
JF - Journal of Power Sources
IS - 9
ER -
