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000850875 041__ $$aEnglish
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000850875 1001_ $$0P:(DE-Juel1)129628$$aMa, Qianli$$b0$$eCorresponding author
000850875 245__ $$aCharacterization and Optimization of La0.97Ni0.5Co0.5O3−δ -Based Air-Electrodes for Solid Oxide Cells
000850875 260__ $$aWashington, DC$$bACS Publications$$c2018
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000850875 520__ $$aOn 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.
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000850875 7001_ $$0P:(DE-Juel1)161336$$aBalaguer, Maria$$b1
000850875 7001_ $$0P:(DE-HGF)0$$aPérez-Coll, Domingo$$b2
000850875 7001_ $$0P:(DE-Juel1)129952$$ade Haart, L.G.J.$$b3$$ufzj
000850875 7001_ $$0P:(DE-HGF)0$$aSerra, Jose M.$$b4
000850875 7001_ $$0P:(DE-HGF)0$$aMather, Glenn C.$$b5
000850875 7001_ $$0P:(DE-Juel1)129667$$aTietz, Frank$$b6
000850875 7001_ $$0P:(DE-Juel1)129636$$aMenzler, Norbert H.$$b7
000850875 7001_ $$0P:(DE-Juel1)161591$$aGuillon, Olivier$$b8
000850875 773__ $$0PERI:(DE-600)2916551-9$$a10.1021/acsaem.8b00456$$gVol. 1, no. 6, p. 2784 - 2792$$n6$$p2784 - 2792$$tACS applied energy materials$$v1$$x2574-0962$$y2018
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