Abstract
In this work changes in physico-chemical properties (oxygen interphase exchange rate and specific resistance) and microstructure parameters (TPB length and tortuosity factor) with time have been analyzed to find the quantitative relationships on the example of composite cathode material LSM-YSZ. 3D microstructure of LSM-YSZ materials has been reconstructed and tortuosity factor has been calculated on the basis of SEM image analysis using the original software.
Highlights
One of the most important areas of the global energy and energy efficiency is the development and study of the solid oxide fuel cells (SOFCs), they belong to class of chemical power sources, in which the chemical energy reagents electrochemically converted into electricity
A significant advantage of the SOFCs is its silent operation and a lack of emissions during its operation, but there are several problems associated with the degradation of the materials that make up SOFCs
It is known that the microstructure of functional materials is a determining factor in the kinetics of the processes occurring during operation of the SOFC
Summary
One of the most important areas of the global energy and energy efficiency is the development and study of the solid oxide fuel cells (SOFCs), they belong to class of chemical power sources, in which the chemical energy reagents (fuel and oxidizer) electrochemically converted into electricity. Modeling of a microstructure and calculation a tortuosity factor for cathodic materials of LSM–YSZ There are a number of parameters of the microstructure, which can only be calculated from the three-dimensional model: the length of the three-phase (TFG) and interphase (FIG) boundaries; proportion of active TFG, open pores; tortuosity factor, etc.
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