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Updated: Jun 26, 2026
15:08
Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
Published on: September 20, 2012
Three-dimensional analysis of solid oxide fuel cell Ni-YSZ anode interconnectivity
James R Wilson1, Marcio Gameiro, Konstantin Mischaikow
1Department of Materials Science, Northwestern University, 2220 Campus Dr., Evanston, IL 60208, USA.
Summary
A new method quantifies solid-oxide fuel cell electrode interconnectivity. Over 11% of triple-phase boundaries in a Ni-YSZ anode were inactive due to isolated phases.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Solid-oxide fuel cells (SOFCs) require efficient electrode microstructures for optimal performance.
- Understanding phase interconnectivity is crucial for predicting SOFC anode activity.
Purpose of the Study:
- To develop and apply a quantitative method for analyzing the interconnectivity of SOFC electrode phases.
- To assess the electrochemical activity of triple-phase boundaries (TPBs) based on phase contiguity.
Main Methods:
- Utilized focused ion beam scanning electron microscopy (FIB-SEM) to obtain 3D microstructural data of a Ni-YSZ anode.
- Developed algorithms to identify and label contiguous networks of Nickel (Ni), Yttria-stabilized Zirconia (YSZ), and porosity.
- Evaluated TPB segments for the contiguity of all three phases at their location.
Main Results:
- The Yttria-stabilized Zirconia (YSZ) phase exhibited 100% connectivity.
- At least 86% of the Nickel (Ni) phase and 96% of the pores were connected.
- 11.6% of the total triple-phase boundary (TPB) length was found to be on isolated phases and thus electrochemically inactive.
Conclusions:
- The developed method provides quantitative insights into SOFC electrode microstructure.
- A significant portion of the TPB in the analyzed Ni-YSZ anode was not electrochemically active, impacting overall cell performance.
- Microstructural analysis is essential for optimizing SOFC electrode design and maximizing energy conversion efficiency.
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