REACTION BETWEEN SOLID OXIDE FUEL-CELL MATERIALS
REACTION BETWEEN SOLID OXIDE FUEL-CELL MATERIALS
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DOI：
10.1016/0167-2738(92)90218-e
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发表时间：
1992-02-01
影响因子：
3.2
通讯作者：
ANZAI, I
中科院分区：
文献类型：
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作者：
KAWADA, T;SAKAI, N;ANZAI, I
在固体氧化物燃料电池的制造过程中，高温热处理是不可避免的。 这将引起电池组成材料：氧化钇稳定的氧化锆（YSZ，电解质）、（La，Sr）MnO 3（阴极）、Ni-YSZ金属陶瓷（阳极）和（La，Ca）CrO 3（隔膜）之间的相互反应和相互扩散。 通过热力学计算对LaMnO_3和YSZ的反应活性进行了估算，发现LaMnO_3中La位的非化学计量比对反应起着重要的作用。 Mn向YSZ中的扩散导致界面La活度增加，促进了反应。 当Mn固溶于YSZ的立方相中时，YSZ的电导率降低。 溶解态Mn的氧化态随氧分压的变化而变化，并影响YSZ的电性能。 Ca从（La，Ca）CrO 3隔膜向其它电池组件的迁移是共烧电池制造过程中的最大问题之一，因为它阻止了隔膜的烧结。
In fabrication processes of solid oxide fuel cells, high-temperature heat treatments cannot be avoided. It will give rise to mutual reaction and interdiffusion of the cell component materials: yttria-stabilized zirconia (YSZ, electrolyte), (La, Sr)MnO3 (cathode), Ni-YSZ cermet (anode) and (La, Ca)CrO3 (separator). Reactivity of LaMnO3 and YSZ was estimated by thermodynamic calculations, and it was found that the nonstoichiometry at La site in LaMnO3 plays an important role on the reaction. Diffusion of Mn into YSZ leads to increase of La activity at the interface and promotes the reaction. Electrical conductivity of YSZ decreases when Mn dissolves in the cubic phase of YSZ. Oxidation state of the dissolving Mn varies with partial pressure of oxygen and affects the electrical properties of YSZ. Migration of Ca from (La, Ca)CrO3 separator to other cell components is one of the largest problems in the co-firing cell fabrication process because it prohibits the sintering of the separator.