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http://dx.doi.org/10.1007/s40684-018-0066-x

Effect of Sintering Process with Co3O4 on the Performance of LSCF-Based Cathodes for Solid Oxide Fuel Cells  

Khurana, Sanchit (Department of Mechanical Engineering, University of California Merced)
Johnson, Sean (Department of Mechanical Engineering, University of California Merced)
Karimaghaloo, Alireza (Department of Mechanical Engineering, University of California Merced)
Lee, Min Hwan (Department of Mechanical Engineering, University of California Merced)
Publication Information
International Journal of Precision Engineering and Manufacturing-Green Technology / v.5, no.5, 2018 , pp. 637-642 More about this Journal
Abstract
The impact of the sintering process, especially in terms of sintering temperature and sintering aid concentration, on the ohmic transport and electrode performance of $(La_{0.80}Sr_{0.20})_{0.95}CoO_{3-{\delta}}$-gadolinia-doped ceria (LSCF-GDC) cathodes is studied. The ohmic and charge-transfer kinetics exhibit a highly coupled $Co_3O_4$ concentration dependency, showing the best performances at an optimum range of 4-5 wt%. This is ascribed to small grain sizes and improved connection between particles. The addition of $Co_3O_4$ was also found to have a dominant impact on charge-transfer kinetics in the LSCF-GDC composite layer and a moderate impact on the electronic transport in the current-collecting LSCF layer. Care should be taken to avoid a formation of excessive thermal stresses between layers when adding $Co_3O_4$.
Keywords
Solid oxide fuel cell; LSCF; Cathode; Sintering aid; Cobalt oxide; Electrochemical impedance spectroscopy;
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