Nondestructive Nanoscale 3D Elemental Mapping and Analysis of a Solid Oxide Fuel Cell Anode
Nondestructive Nanoscale 3D Elemental Mapping and Analysis of a Solid Oxide Fuel Cell Anode
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DOI：
10.1149/1.3355957
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发表时间：
2010-01-01
影响因子：
3.9
通讯作者：
Chiu, Wilson K. S.
中科院分区：
文献类型：
--
作者：
Grew, Kyle N.;Chu, Yong S.;Chiu, Wilson K. S.
目前的固体氧化物燃料电池（SOFC）使用复合材料来提供（i）足够的稳定性和支撑，（ii）电子、离子和质量传输，以及（iii）电催化活性。然而，有一个有限的定量了解SOFC的三维（3D）纳米/微观结构的电子，离子和传质相关的损失的影响。在这里，一个非破坏性的断层成像技术在38.5 nm的空间分辨率是使用沿着与数值模型，以检查在SOFC阳极的相和孔隙网络，并提供洞察到异质微观结构的贡献的起源运输相关的损失。该微结构产生大量的局部结构诱导损失，其中约50%的这些损失是由0.2 μ m或更小的相横截面直径引起的（C）2010电化学学会。[DOI：10.1149/1.3355957]保留所有权利。
Present solid oxide fuel cells (SOFCs) use complex materials to provide (i) sufficient stability and support, (ii) electronic, ionic, and mass transport, and (iii) electrocatalytic activity. However, there is a limited quantitative understanding of the effect of the SOFC's three dimensional (3D) nano/microstructure on electronic, ionic, and mass-transfer-related losses. Here, a nondestructive tomographic imaging technique at 38.5 nm spatial resolution is used along with numerical models to examine the phase and pore networks within an SOFC anode and to provide insight into the heterogeneous microstructure's contributions to the origins of transport-related losses. The microstructure produces substantial localized structure-induced losses, with approximately 50% of those losses arising from phase cross-sectional diameters of 0.2 mu m or less. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3355957] All rights reserved.