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首页> 外文会议>International Symposium on Solid Oxide Fuel Cells >Investigation of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) Electrode Performance and Microstructural Evolutions Based on Three Dimensional Microstructure Reconstruction and Electrochemical Simulation
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Investigation of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) Electrode Performance and Microstructural Evolutions Based on Three Dimensional Microstructure Reconstruction and Electrochemical Simulation

机译：基于三维微观结构重建和电化学模拟的LA_（0.6）SR_（0.2）CO_（0.2）FE_（0.2）FE_（0.8）电极性能和微观结构演进的研究

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摘要

The influence of initial microstructure of gadolinium-doped-ceria (GDC) interlayer on La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) (LSCF) performance evolution was studied. The cell with the GDC interlayer fired at 1300°C (GDC1300), in which SrZrO_3 phase shows discontinuous formation between GDC interlayer and yttria-stabilized-zirconia (YSZ) electrolyte, showed gradual increase of polarization resistance during 100 hours operation. In contrast, when the GDC interlayer was fired at 1200°C (GDC1200), continuous SrZrO_3 layer was formed between interlayer electrolyte interface, and the cell showed large polarization resistance with recovery during operation. The strontium oxide phase was formed inside the LSCF cathode phase after the operation of GDC1300 at 800°C, whereas the GDC1300 operated at 700°C and GDC1200 operated at either 700°C or 800°C showed no decomposition of LSCF phase. It is considered that the differences of performance and microstructural evolution are highly dependent on initial microstructures and operating temperatures.
机译：研究了钆 - 掺杂型（GDC）中间层对LA_（0.6）SR_（0.4）CO_（0.2）FE_（0.8）O_（3-Δ）（3-δ）（LSCF）性能演化的影响。具有GDC中间层的细胞在1300℃（GDC1300）下烧制，其中SrzRO_3相显示GDC中间层和氧化钇稳定 - 氧化锆（YSZ）电解质之间的不连续形成，在100小时操​​作期间显示偏振电阻逐渐增加。相反，当在1200℃（GDC1200）烧制GDC中间层时，在中间层电解质界面之间形成连续的SRZRO_3层，并且在操作期间，该电池显示出大的偏振电阻。在800℃下的GdC1300的操作之后在LSCF阴极相中形成氧化锶相，而在700℃和700℃或800℃下操作的GDC1300在700℃和800℃下操作的GDC1300显示出LSCF相的分解。据认为，性能和微观结构演化的差异高度依赖于初始微观结构和操作温度。

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