Citrate-Hydrothermal Synthesis and Electrochemical Characterization of La0.6Sr0.4Co0.2Fe0.8O3 for Intermediate Temperature SOFC

Laurenia M. Pereira Garcia; Graziele L. Souza; Rubens M. Nascimento; Daniel A. Macedo; Fabiana V. Motta; Carlos A. Paskocimas

doi:10.4028/www.scientific.net/MSF.775-776.673

Paper Titles

Clay Ceramic Incorporated with Granite Waste Obtained from Diamond Multi-Wire Sawing Technology
p.648

Kaolin Residue as an Alternative Binder for Grout Seat and Revetment
p.653

Preparation of Polyamide 6/PE-g-MA/Compound by Recycled Rubber (SBRr) Blends
p.659

Development of Ceramic Refractory Filters from Alternative Mineral Source: Rheological Characterization
p.664

Citrate-Hydrothermal Synthesis and Electrochemical Characterization of La_0.6Sr_0.4Co_0.2Fe_0.8O₃ for Intermediate Temperature SOFC
p.673

Evaluation of Structural and Morphological Characteristics of the System Ni_1-xZn_xFe₂O₄ Obtained by Combustion Reaction
p.678

Combustion Synthesis of the MgAl₂O₄ Using Glycerin from the Production of Biodiesel
p.682

Effect of Reaction Temperature in the Alumina Preparation by Combustion in a Muffle Furnace
p.687

ZnAl₂O₄/Chitosan Films and Evaluation of the Influence of ZnAl₂O₄ Filler on the Films Morphology, Structure and Thermal Properties
p.692

HomeMaterials Science ForumMaterials Science Forum Vols. 775-776Citrate-Hydrothermal Synthesis and Electrochemical...

Citrate-Hydrothermal Synthesis and Electrochemical Characterization of La_0.6Sr_0.4Co_0.2Fe_0.8O₃ for Intermediate Temperature SOFC

Abstract:

Lanthanum cobaltites doped with strontium and iron (La_1-xSr_xCo_1-yFe_yO₃) have been intensively studied as cathode materials for solid oxide fuel cells (SOFC). In this work, powders of composition La_0.6Sr_0.4Co_0.2Fe_0.8O₃ (LSCF6428) were synthesized by a combination of citrate and hydrothermal methods. As-prepared and calcined powders were investigated by different material characterization techniques. LSCF films were obtained on gadolinium doped ceria substrates (CGO) after sintering at 1200 °C. The effects of the sintering conditions on the microstructure and electrochemical performance of the electrodes were evaluated by scanning electron microscopy and impedance spectroscopy. The electrochemical characterization was assessed using a symmetrical cell configuration (LSCF/CGO/LSCF) at temperatures ranging from 650 to 800 °C. The area specific resistance showed strong relationship with microstructure. The best electrochemical behavior (0.18 ohm.cm² at 800 °C) was obtained by using sintering dwell time of 2 h.