INVESTIGADORES
SERQUIS Adriana Cristina
artículos
Título:
Effect of cobalt-doped electrolyte on the electrochemical performance of LSCFO/CGO interfaces
Autor/es:
L. BAQUÉ; K. PADMASREE; M. A. CENICEROS REYES; H. TROIANI; M. ARCE; A. SOLDATI; A. SERQUIS
Revista:
ECS Transactions
Editorial:
The Electrochemical Society
Referencias:
Lugar: Auburn; Año: 2016 vol. 72 p. 117 - 121
ISSN:
1938-6737
Resumen:
In this work, we have studied La0.4Sr0.6Co0.8Fe0.2O3-δ/Ce0.8Gd0.2O2-δ/La0.4Sr0.6Co0.8Fe0.2O3-δ symmetrical cells containing Ce0.8Gd0.2O2-δ electrolytes synthetized with and without the addition of cobalt as sintering aid. Electrochemical impedance spectroscopy results indicate that both electrolyte and cathode impedance response are affected by the addition of Co to the electrolyte, despite using cathodes with similar nano/microstructure according to scanning electron microscopy observations. Transmission electron microscopy characterization revealed the formation of columnar structures at the cathode/electrolyte interface of the cell with Co-doped electrolyte. These columnar structures would negatively affect the cell performance hindering the diffusion of oxide ions from the cathode to the electrolyte.
