Multi Length-Scale Quantification of Hierarchical Microstructure in Designed Microtubular SOFC Electrodes
Multi Length-Scale Quantification of Hierarchical Microstructure in Designed Microtubular SOFC Electrodes
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设计的微管式 SOFC 电极中分层微观结构的多长度尺度量化
DOI：
10.1149/06801.1857ecst
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Cooper S
中科院分区：
文献类型：
--
作者：
Cooper S
采用成像和模拟的方法，在多个尺度上分析了微管状固体氧化物燃料电池（MT-SOFC）阳极的输运特性。研究的阳极支撑体是使用相转化辅助共挤出工艺制造的，该工艺产生了分层和高度各向异性的微观结构。观察到所得的孔隙网络包含两个不同的，但相互作用的运输系统。这些系统中的特征跨越几个数量级，因此不可能同时对它们进行成像或建模。模拟结果表明，微结构的设计有利于这些细胞所需的径向运输;然而，这一结论只能通过考虑许多长度尺度上的扩散系统来获得。
The transport properties of a micro-tubular solid oxide fuel cell (MT-SOFC) anode have been analysed by imaging and simulation at multiple length-scales. The anode support investigated was manufactured using a phase inversion-assisted co-extrusion process, which generated a hierarchical and highly anisotropic microstructure. The resulting pore network was observed to contain two distinct, but interacting transport systems. The features in these systems spanned several orders of magnitude and as such it was not possible to image or model them simultaneously. The simulations indicated that the design of the microstructure was beneficial for the radial transport required by these cells; however this conclusion was only obtained by considering diffusive systems at many length-scales.