TY - JOUR
T1 - Infiltration of ionic-, electronic- and mixed-conducting nano particles into La0.75Sr0.25MnO3–Y0.16Zr0.84O2 cathodes – A comparative study of performance enhancement and stability at different temperatures
AU - Kiebach, Wolff-Ragnar
AU - Knöfel, Christina
AU - Bozza, Francesco
AU - Klemensø, Trine
AU - Chatzichristodoulou, Christodoulos
PY - 2013
Y1 - 2013
N2 - The microstructure and electrochemical performance of LSM–YSZ composite electrodes infiltrated with La0.8Sr0.2MnO3−δ (LSM) as an electronic conductor, LaCo0.6Ni0.4O3−δ (LCN) as a mixed conductor and Ce0.8Gd0.2O2−δ (CGO) as an ionic conductor, were compared in the temperature range 550–800 °C. All three infiltrates resulted in improved electrochemical performance. Impedance analysis suggested dissociative adsorption and transfer of species to the triple phase boundary as the main mechanism responsible for the performance enhancement in all cases, attributed to the increase in surface area and triple phase boundary upon infiltration. LCN showed the most pronounced improvement at 550 °C, but its performance degraded drastically with increasing temperature. LSM and CGO infiltrated electrodes degraded less upon heating up to 800 °C. Infiltrated CGO electrodes showed the smallest degradation rate upon long term testing at 750 °C.
AB - The microstructure and electrochemical performance of LSM–YSZ composite electrodes infiltrated with La0.8Sr0.2MnO3−δ (LSM) as an electronic conductor, LaCo0.6Ni0.4O3−δ (LCN) as a mixed conductor and Ce0.8Gd0.2O2−δ (CGO) as an ionic conductor, were compared in the temperature range 550–800 °C. All three infiltrates resulted in improved electrochemical performance. Impedance analysis suggested dissociative adsorption and transfer of species to the triple phase boundary as the main mechanism responsible for the performance enhancement in all cases, attributed to the increase in surface area and triple phase boundary upon infiltration. LCN showed the most pronounced improvement at 550 °C, but its performance degraded drastically with increasing temperature. LSM and CGO infiltrated electrodes degraded less upon heating up to 800 °C. Infiltrated CGO electrodes showed the smallest degradation rate upon long term testing at 750 °C.
KW - Solid oxide fuel cell
KW - LSM cathode
KW - Infiltration
KW - Impregnation
KW - Nano particle
U2 - 10.1016/j.jpowsour.2012.11.070
DO - 10.1016/j.jpowsour.2012.11.070
M3 - Journal article
VL - 228
SP - 170
EP - 177
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -