Reconstruction of porous electrodes by FIB/SEM for detailed microstructure modeling

被引：147

作者：

Joos, Jochen ^{[1
]}

Carraro, Thomas ^{[3
]}

Weber, Andre ^{[1
]}

Ivers-Tiffee, Ellen ^{[1
,2
]}

机构：

[1] Karlsruher Inst Technol, Inst Werkstoffe Elektrotech, D-76131 Karlsruhe, Germany

[2] Karlsruher Inst Technol, Ctr Funct Nanostruct, D-76131 Karlsruhe, Germany

[3] Univ Heidelberg, Inst Angew Math, D-62120 Heidelberg, Germany

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 17期

关键词：

SOFC; LSCF; Focused ion beam (FIB); Microstructure modeling; Segmentation algorithm; OXIDE FUEL-CELLS; 3-DIMENSIONAL RECONSTRUCTION; ANODE; CATHODES;

D O I：

10.1016/j.jpowsour.2010.10.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polarization losses within electrodes of solid oxide fuel cells (SOFCs) are determined both by material composition and microstructure. Improvement in performance can be supported by a detailed characterization and modeling of the electrode microstructure. Focused ion beam (FIB) and scanning electron microscopy (SEM) combined with image processing have already proven potential for the reconstruction of porous electrodes. In this contribution the serialized reconstruction procedure of a high-performance, mixed ionic-electronic conducting La0.58Sr0.4Co0.2Fe0.8O3-delta (LSCF)-cathode will be illustrated in detail. Based on corrected reconstruction data sets and by the evaluation of qualified algorithms discriminating between porosity and electrode material, a sensitivity analysis of the grayscale threshold value on the essential parameters (i) surface area, (ii) volume/porosity fraction and (iii) tortuosity is performed. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：7302 / 7307

页数：6

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