Journal
JOURNAL OF POWER SOURCES
Volume 277, Issue -, Pages 277-285Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.11.123
Keywords
Distribution of relaxation time; X-ray computed tomography; Solid oxide fuel cell; Electrochemical impedance spectroscopy
Funding
- U.S. National Science Foundation [DMR-1210792]
- National Natural Science Foundation of China [51402066]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1210792] Funding Source: National Science Foundation
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Three-dimensional (3D) microstructure of solid oxide fuel cell electrodes plays critical roles in determining fuel cell performance. The state-of-the-art quantification technique such as X-ray computed tomography enables direct calculation of geometric factors by 3D microstructure reconstruction. Taking advantages of in-situ, fast-responding and low cost, electrochemical impedance spectroscopy represented by distribution of relaxation time (DRT) is a novel technique to estimate geometric properties of fuel cell electrodes. In this study, we employed the anode supported cells with the cell configuration of Ni-YSZ parallel to YSZ parallel to LSM-YSZ as an example and compared the tortuosity factor of pores of the anode substrate layer by X-ray computed tomography and DRT analysis. Good agreement was found, validating the feasibility of in-situ microstructural quantification by using the DRT technique. (C) 2014 Elsevier B.V. All rights reserved.
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