Three-Dimensional Reconstruction and Microstructure Modeling of Porosity-Graded Cathode Using Focused Ion Beam and Homogenization Techniques

Journal Article · Fri Dec 20 00:00:00 EST 2013 · Fuel Cells

DOI:https://doi.org/10.1002/fuce.201300170· OSTI ID:1158464

Hamedani, Amani ^[1]; Baniassadi, Majid ^[2]; Sheidaei, A. ^[3]; Pourboghrat, F. ^[3]; Remond, Y. ^[2]; Khaleel, Mohammad A. ^[4]; Garmestani, Hamid ^[1]

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1. Georgia Inst. of Technology, Atlanta, GA (United States)
2. Univ. of Strasbourg (France)
3. Michigan State Univ., East Lansing, MI (United States)
4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

In this study, microstructure of a porosity-graded lanthanum strontium manganite (LSM) cathode of solid oxide fuel cells (SOFCs) has been characterized using focused ion beam (FIB) and scanning electron microscopy(SEM) combined with image processing. Two-point correlation functions of the two-dimensional (2D) images taken along the direction of porosity gradient are used to reconstruct a three-dimensional (3D) microstructure. The effective elastic modulus of the two-phase porosity-graded cathode is predicted using strong contrast (SC) and composite inclusion (CI) homogenization techniques. The effectiveness of the two methods in predicting the effective elastic properties of the porositygraded LSM cathode is investigated in comparison with the results obtained from the finite element model (FEM).

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1158464
• Report Number(s): PNNL-SA-104098
• Journal Information: Fuel Cells, Vol. 14, Issue 1; ISSN 1615-6846
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE