TY  - JOUR
AU  - Ma, Qianli
AU  - Balaguer, Maria
AU  - Pérez-Coll, Domingo
AU  - de Haart, L.G.J.
AU  - Serra, Jose M.
AU  - Mather, Glenn C.
AU  - Tietz, Frank
AU  - Menzler, Norbert H.
AU  - Guillon, Olivier
TI  - Characterization and Optimization of La0.97Ni0.5Co0.5O3−δ -Based Air-Electrodes for Solid Oxide Cells
JO  - ACS applied energy materials
VL  - 1
IS  - 6
SN  - 2574-0962
CY  - Washington, DC
PB  - ACS Publications
M1  - FZJ-2018-04626
SP  - 2784 - 2792
PY  - 2018
AB  - On the basis of previous studies of perovskites in the quasi-ternary system LaFeO3–LaCoO3–LaNiO3, LaNi0.5Co0.5O3 (LNC) is chosen as the most promising air-electrode material in the series for solid oxide cells (SOCs). In the present study, A-site deficiency of LNC is discussed and La0.97Ni0.5Co0.5O3 (LNC97) is selected as the optimal composition. Compatibility of LNC97 with 8 mol % Y2O3 stabilized ZrO2 (8YSZ) is analyzed and compared with that of the state-of-the-art air-electrode La0.58Sr0.4Co0.2Fe0.8O3−δ (LSCF) and 8YSZ. Targeting to the requirements of high-performance SOC air-electrodes (high electronic and ionic conductivity and high catalytic activity for the oxygen reduction reaction), LNC97-based air-electrodes are tailored, characterized and optimized by symmetric-cell tests. Principles of air-electrode design for SOCs are revealed accordingly. Long-term measurement of the symmetric cells over a period of 1000 h is performed and possible degradation mechanisms are discussed. Full cells based on optimized LNC97 air-electrodes are also tested. Lower reactivity with 8YSZ in comparison to LSCF and a similar performance render LNC97 a very competitive candidate to substitute LSCF as air-electrode material of choice for SOCs.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000458705800051
DO  - DOI:10.1021/acsaem.8b00456
UR  - https://juser.fz-juelich.de/record/850875
ER  -