La0,7Sr0,3MnO3δ films deposited by electrostatic spray on Fe-Cr alloy applied as interconnect of solid oxide fuel cell (SOFC)

• Grant number: 12/07648-3
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: October 01, 2012
• End date: September 30, 2013
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Eliana Navarro dos Santos Muccillo
• Grantee: Leandro da Conceicao
• Supervisor: Elisabeth Djurado
• Host Institution: Instituto de Pesquisas Energéticas e Nucleares (IPEN). Secretaria de Desenvolvimento Econômico (São Paulo - Estado). São Paulo , SP, Brazil
• Institution abroad: Université de Grenoble, France
• Associated to the scholarship: 11/51689-3 - Development of supported LSM films in metal interconnector for application in solid oxide fuel cells (SOFC), BP.PD

Abstract

The reduction of the operating temperature of solid oxide fuel cell (SOFC) to less than 800°C allows the use of metallic interconnects in planar SOFC systems. Metallic interconnectors exhibit many benefits, including increased thermal and electrical conductivity, good mechanical strength and low manufacturing cost. This proposal focuses on the synthesis and characterization of thin films based on La0.7Sr0.3MnO3 (LSM) deposited on metallic substrates based on commercial ferritic steels SS 444-17%Cr e SS 446-23%Cr (SS- Stainless Steel) used as interconnectors in Solid Oxide Fuel Cells (SOFC). The development of this work consists in the choice of the most suitable parameters for nanostructured LSM film deposition by Electrostatic Spray Deposition (ESD) technique; morphological and microstructural evaluation of the prepared materials. An evaluation of the Cr-diffusion reaction on the interface between the Fe-Cr alloy and the LSM coating will be investigated. The formation of (Cr,Mn)3O4 and Cr2O3 on the substrate surface will be analyzed by techniques like SEM, EDS and XRD. Electrochemical measurements using 2 and 4 probes and impedance spectroscopy will be used to characterize the porosity, the reactivity and the electric properties of the thin films. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DA CONCEICAO, LEANDRO; LAY, SABINE; ROBAUT, FLORENCE; RENOU, GILLES; MUCCILLO, E. N. S.; DJURADO, ELISABETH. Transmission electron microscopy characterization of protective La0.7Sr0.3MnO3-delta coatings prepared by electrostatic spray deposition on ferritic alloy. FUNCTIONAL MATERIALS LETTERS, v. 10, n. 3, JUN 2017. (13/07296-2, 12/07648-3)

DA CONCEICAO, LEANDRO; DESSEMOND, LAURENT; DJURADO, ELISABETH; MUCCILLO, E. N. S.. La0.7Sr0.3MnO3 (- delta) barrier for Cr2O3-forming SOFC interconnect alloy coated by electrostatic spray deposition. SURFACE & COATINGS TECHNOLOGY, v. 254, p. 157-166, SEP 15 2014. (12/07648-3, 11/51689-3)