Three-Dimensional Analysis of Solid Oxide Fuel Cell Ni-YSZ Anode Interconnectivity
Three-Dimensional Analysis of Solid Oxide Fuel Cell Ni-YSZ Anode Interconnectivity
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DOI：
10.1017/s1431927609090096
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发表时间：
2009-01
影响因子：
2.8
通讯作者：
James R. Wilson;Marcio Gameiro;K. Mischaikow;W. Kalies;P. Voorhees;S. Barnett
中科院分区：
文献类型：
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作者：
James R. Wilson;Marcio Gameiro;K. Mischaikow;W. Kalies;P. Voorhees;S. Barnett
摘要本文介绍了一种定量分析固体氧化物燃料电池电极相连通性的方法。该方法被施加到三维微观结构的Ni-Y2 O3稳定的ZrO 2（Ni-YSZ）阳极活性层测量的聚焦离子束扫描电子显微镜。根据Ni、YSZ和孔隙度的每个单独的连续网络是否与电极的其余部分连续来识别和标记。确定YSZ相是100%连接的，而至少86%的Ni和96%的孔是连接的。三相边界（TPB）段进行了鉴定和评价，相对于每一个在其位置的三个阶段的连续性。发现TPB长度的11.6%在一个或多个隔离相上，因此不是电化学活性的。
Abstract A method is described for quantitatively analyzing the level of interconnectivity of solid-oxide fuel cell electrode phases. The method was applied to the three-dimensional microstructure of a Ni–Y2O3-stabilized ZrO2 (Ni-YSZ) anode active layer measured by focused ion beam scanning electron microscopy. Each individual contiguous network of Ni, YSZ, and porosity was identified and labeled according to whether it was contiguous with the rest of the electrode. It was determined that the YSZ phase was 100% connected, whereas at least 86% of the Ni and 96% of the pores were connected. Triple-phase boundary (TPB) segments were identified and evaluated with respect to the contiguity of each of the three phases at their locations. It was found that 11.6% of the TPB length was on one or more isolated phases and hence was not electrochemically active.