NDLI: Sol-gel synthesis of la(0.6)sr(0.4)coo(3-x) and sm(0.5)sr(0.5)coo(3-x) cathode nanopowders for solid oxide fuel cells

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Sol-gel synthesis of la(0.6)sr(0.4)coo(3-x) and sm(0.5)sr(0.5)coo(3-x) cathode nanopowders for solid oxide fuel cells

Content Provider	NASA Technical Reports Server (NTRS)
Author	Wise, Brent Bansal, Narottam P.
Copyright Year	2011
Description	Nanopowders of La(0.6)Sr(0.4)CoO(3-x) (LSC) and Sm(0.5)Sr(0.5)CoO(3-x) (SSC) compositions, which are being investigated as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFC) with La(Sr)Ga(Mg)O(3-x) (LSGM) as the electrolyte, were synthesized by low-temperature sol-gel method using metal nitrates and citric acid. Thermal decomposition of the citrate gels was followed by simultaneous DSC/TGA methods. Development of phases in the gels, on heat treatments at various temperatures, was monitored by x-ray diffraction. Solgel powders calcined at 550 to 1000 C consisted of a number of phases. Single perovskite phase La(0.6)Sr(0.4)CoO(3-x) or Sm(0.5)Sr(0.5)CoO(3-x) powders were obtained at 1200 and 1300 C, respectively. Morphological analysis of the powders calcined at various temperatures was done by scanning electron microscopy. The average particle size of the powders was approx.15 nm after 700 C calcinations and slowly increased to 70 to 100 nm after heat treatments at 1300 to 1400 C.
File Size	2338089
Page Count	17
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120000911
Archival Resource Key	ark:/13960/t78s9qg6d
Language	English
Publisher Date	2011-12-01
Access Restriction	Open
Subject Keyword	Energy Production And Conversion Scanning Electron Microscopy Heat Treatment Solid Oxide Fuel Cells Thermal Decomposition Thermogravimetry Cathodic Coatings Sol-gel Processes Electrolytes Powder Particles X Ray Diffraction Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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