skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Preparation and Characterization of (La 0.8 Sr 0.2 ) 0.95 MnO 3-δ (LSM) Thin Films and LSM/LSCF Interface for Solid Oxide Fuel Cells

Abstract

Uniform, dense, and conformal coatings of (La,Sr)MnO 3-δ (LSM) have been successfully deposited on a silicon wafer and a dense (La,Sr)(Co,Fe)O 3-δ (LSCF) substrate using a stable LSM sol consisting of metal acetate and nitrate precursors dissolved in a mixed organic solvent of 2-methoxyethanol and acetic acid with enhanced wettability. The processing conditions are optimized for precise control of composition, morphology, microstructure, and thickness of the LSM films to examine the microstructure and chemical stability of an LSM film as a catalytic coating for an LSCF cathode. The thicknesses of the LSM films are controlled within the range of 5–60 nm by spin-coating of LSM sol with different concentrations. The LSM films grow epitaxially on the LSCF substrate grains after annealing at 800°C for 1 h due to their structural similarity. The LSM coatings show good stability on LSCF substrates and may suppress strontium oxide segregation on LSCF surface during annealing at 850°C for 900 h, implying that LSM-coated LSCF surfaces have better structural and chemical stability under typical fuel cell operating conditions.

Authors:
;  [1];  [1];  [1]
  1. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Heterogeneous Functional Materials Center (HeteroFoaM)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1383157
DOE Contract Number:  
SC0001061
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the American Ceramic Society; Journal Volume: 94; Journal Issue: 10; Related Information: HeteroFoaM partners with University of South Carolina (lead); University of California, Santa Barbara; University of Connecticut; Georgia Institute of Technology; Princeton University; Rochester Institute of Technology; Savannah River National Laboratory; University of South Carolina; University of Utah
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; catalysis (heterogeneous); energy storage (including batteries and capacitors); hydrogen and fuel cells; mechanical behavior; charge transport; membrane; carbon sequestration; materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable processing)

Citation Formats

Choi, Jong-Jin, Qin, Wantao, Liu, Mingfei, and Liu, Meilin. Preparation and Characterization of (La 0.8 Sr 0.2 ) 0.95 MnO 3-δ (LSM) Thin Films and LSM/LSCF Interface for Solid Oxide Fuel Cells. United States: N. p., 2011. Web. doi:10.1111/j.1551-2916.2011.04614.x.
Choi, Jong-Jin, Qin, Wantao, Liu, Mingfei, & Liu, Meilin. Preparation and Characterization of (La 0.8 Sr 0.2 ) 0.95 MnO 3-δ (LSM) Thin Films and LSM/LSCF Interface for Solid Oxide Fuel Cells. United States. doi:10.1111/j.1551-2916.2011.04614.x.
Choi, Jong-Jin, Qin, Wantao, Liu, Mingfei, and Liu, Meilin. Wed . "Preparation and Characterization of (La 0.8 Sr 0.2 ) 0.95 MnO 3-δ (LSM) Thin Films and LSM/LSCF Interface for Solid Oxide Fuel Cells". United States. doi:10.1111/j.1551-2916.2011.04614.x.
@article{osti_1383157,
title = {Preparation and Characterization of (La 0.8 Sr 0.2 ) 0.95 MnO 3-δ (LSM) Thin Films and LSM/LSCF Interface for Solid Oxide Fuel Cells},
author = {Choi, Jong-Jin and Qin, Wantao and Liu, Mingfei and Liu, Meilin},
abstractNote = {Uniform, dense, and conformal coatings of (La,Sr)MnO3-δ (LSM) have been successfully deposited on a silicon wafer and a dense (La,Sr)(Co,Fe)O3-δ (LSCF) substrate using a stable LSM sol consisting of metal acetate and nitrate precursors dissolved in a mixed organic solvent of 2-methoxyethanol and acetic acid with enhanced wettability. The processing conditions are optimized for precise control of composition, morphology, microstructure, and thickness of the LSM films to examine the microstructure and chemical stability of an LSM film as a catalytic coating for an LSCF cathode. The thicknesses of the LSM films are controlled within the range of 5–60 nm by spin-coating of LSM sol with different concentrations. The LSM films grow epitaxially on the LSCF substrate grains after annealing at 800°C for 1 h due to their structural similarity. The LSM coatings show good stability on LSCF substrates and may suppress strontium oxide segregation on LSCF surface during annealing at 850°C for 900 h, implying that LSM-coated LSCF surfaces have better structural and chemical stability under typical fuel cell operating conditions.},
doi = {10.1111/j.1551-2916.2011.04614.x},
journal = {Journal of the American Ceramic Society},
number = 10,
volume = 94,
place = {United States},
year = {Wed May 25 00:00:00 EDT 2011},
month = {Wed May 25 00:00:00 EDT 2011}
}