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Experimental and computational investigations on the SO2 poisoning of (La0.8Sr0.2)0.95MnO3 cathode materials

Journal Article · · Advanced Powder Materials
 [1];  [2];  [3];  [4]
  1. Worcester Polytechnic Institute, MA (United States); Worcester Polytechnic Institute
  2. Univ. of Connecticut, Storrs, CT (United States)
  3. Boston Univ., MA (United States)
  4. Worcester Polytechnic Institute, MA (United States)
To study the formation of detrimental phases under the sulfur gas impurity to the long-term degradation in the LSM cathode material, the classic cathode material, (La0.8Sr0.2)0.95MnO3 (LSM), was prepared, sintered, and annealed at 800, 900, and 1000°C in the sulfur-containing atmospheres, respectively. Through X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Transmission electron microscopy (TEM) techniques, as well as the CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) methodology, the secondary phases, especially the detrimental ones, under different conditions were predicted and experimentally verified correspondingly. Furthermore, sulfur poisoning results indicate that the accelerated tests might have degradation mechanisms different from actual operation conditions. More importantly, comprehensive comparisons among various impurity-containing conditions were also made to recommend better operation parameters.
Research Organization:
Worcester Polytechnic Institute, MA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FE0031652
OSTI ID:
2006772
Journal Information:
Advanced Powder Materials, Journal Name: Advanced Powder Materials Journal Issue: 1 Vol. 2; ISSN 2772-834X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (14)


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