Abstract
Nickel agglomeration in the fuel electrode of a solid oxide fuel cell spoils its performance, so the ability to understand, predict, and minimize this effect is of great interest. The authors present an analytical model of Ni nucleation, revealing the time evolution of average particle size based on the electrode's initial microstructure and the cell's operating conditions. Their approach applies to all such two-component porous systems where only one component agglomerates, and could be extended for atmospheres with more than two reactants, as in Co electrolysis, or for systems in which both solid phases tend to clump.
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