%0 Journal Article
%A Ma, Qianli
%A Balaguer, Maria
%A Pérez-Coll, Domingo
%A de Haart, L.G.J.
%A Serra, Jose M.
%A Mather, Glenn C.
%A Tietz, Frank
%A Menzler, Norbert H.
%A Guillon, Olivier
%T Characterization and Optimization of La0.97Ni0.5Co0.5O3−δ -Based Air-Electrodes for Solid Oxide Cells
%J ACS applied energy materials
%V 1
%N 6
%@ 2574-0962
%C Washington, DC
%I ACS Publications
%M FZJ-2018-04626
%P 2784 - 2792
%D 2018
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000458705800051
%R 10.1021/acsaem.8b00456
%U https://juser.fz-juelich.de/record/850875