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Title: Materials System for Intermediate Temperature Solid Oxide Fuel Cell

Abstract

The objective of this work was to obtain a stable materials system for intermediate temperature solid oxide fuel cell (SOFC) capable of operating between 600-800 C with a power density greater than 0.2 W/cm{sup 2}. The solid electrolyte chosen for this system was La{sub 0.9}Sr{sub 0.1}Ga{sub 0.8}Mg{sub 0.2}O{sub 3}, (LSGM). To select the right electrode materials from a group of possible candidate materials, AC complex impedance spectroscopy studies were conducted between 600-800 C on symmetrical cells that employed the LSGM electrolyte. Based on the results of the investigation, LSGM electrolyte supported SOFCs were fabricated with La{sub 0.6}Sr{sub 0.4}Co{sub 0.8}Fe{sub 0.2}O{sub 3}-La{sub 0.9}Sr{sub 0.1}Ga{sub 0.8}Mg{sub 0.2}O{sub 3} (LSCF-LSGM) composite cathode and Nickel-Ce{sub 0.6}La{sub 0.4}O{sub 3} (Ni-LDC) composite anode having a barrier layer of Ce{sub 0.6}La{sub 0.4}O{sub 3} (LDC) between the LSGM electrolyte and the Ni-LDC anode. Electrical performance and stability of these cells were determined and the electrode polarization behavior as a function of cell current was modeled between 600-800 C. The electrical performance of the anode-supported SOFC was simulated assuming an electrode polarization behavior identical to the LSGM-electrolyte-supported SOFC. The simulated electrical performance indicated that the selected material system would provide a stable cell capable of operating between 600-800 Cmore » with a power density between 0.2 to 1 W/cm{sup 2}.« less

Authors:
;
Publication Date:
Research Org.:
Boston University
Sponsoring Org.:
USDOE
OSTI Identifier:
877372
DOE Contract Number:  
FG26-02NT41539
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; ANODES; CATHODES; ELECTRODES; ELECTROLYTES; IMPEDANCE; PERFORMANCE; POLARIZATION; POWER DENSITY; SOLID ELECTROLYTES; SOLID OXIDE FUEL CELLS; SPECTROSCOPY; STABILITY

Citation Formats

Pal, Uday B, and Gopalan, Srikanth. Materials System for Intermediate Temperature Solid Oxide Fuel Cell. United States: N. p., 2006. Web. doi:10.2172/877372.
Pal, Uday B, & Gopalan, Srikanth. Materials System for Intermediate Temperature Solid Oxide Fuel Cell. United States. https://doi.org/10.2172/877372
Pal, Uday B, and Gopalan, Srikanth. Thu . "Materials System for Intermediate Temperature Solid Oxide Fuel Cell". United States. https://doi.org/10.2172/877372. https://www.osti.gov/servlets/purl/877372.
@article{osti_877372,
title = {Materials System for Intermediate Temperature Solid Oxide Fuel Cell},
author = {Pal, Uday B and Gopalan, Srikanth},
abstractNote = {The objective of this work was to obtain a stable materials system for intermediate temperature solid oxide fuel cell (SOFC) capable of operating between 600-800 C with a power density greater than 0.2 W/cm{sup 2}. The solid electrolyte chosen for this system was La{sub 0.9}Sr{sub 0.1}Ga{sub 0.8}Mg{sub 0.2}O{sub 3}, (LSGM). To select the right electrode materials from a group of possible candidate materials, AC complex impedance spectroscopy studies were conducted between 600-800 C on symmetrical cells that employed the LSGM electrolyte. Based on the results of the investigation, LSGM electrolyte supported SOFCs were fabricated with La{sub 0.6}Sr{sub 0.4}Co{sub 0.8}Fe{sub 0.2}O{sub 3}-La{sub 0.9}Sr{sub 0.1}Ga{sub 0.8}Mg{sub 0.2}O{sub 3} (LSCF-LSGM) composite cathode and Nickel-Ce{sub 0.6}La{sub 0.4}O{sub 3} (Ni-LDC) composite anode having a barrier layer of Ce{sub 0.6}La{sub 0.4}O{sub 3} (LDC) between the LSGM electrolyte and the Ni-LDC anode. Electrical performance and stability of these cells were determined and the electrode polarization behavior as a function of cell current was modeled between 600-800 C. The electrical performance of the anode-supported SOFC was simulated assuming an electrode polarization behavior identical to the LSGM-electrolyte-supported SOFC. The simulated electrical performance indicated that the selected material system would provide a stable cell capable of operating between 600-800 C with a power density between 0.2 to 1 W/cm{sup 2}.},
doi = {10.2172/877372},
url = {https://www.osti.gov/biblio/877372}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {1}
}