Preliminary Study of the La4-xAxNi3O10-δ (A = Na, K and Sr) Systems as IT-SOFC Cathode Materials

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Authors
  1. Au, D.
  2. Amow, G.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);Waterloo Univ, Waterloo ONT (CAN)
Abstract
A preliminary study of the La4-xAxNi3O10-δ (A = Na, K and Sr) system was carried out to determine their viability as IT-SOFC cathodes. For this study, two synthesis routes were used, both of which showed limited solubility ranges of the A-site doped cations. Physical property measurements show an enhancement of the electrical conductivity with A-site cation doping, good thermal stability and thermal expansion coefficients of α ~ 12.90 – 13.05 x 10-6 K-1. Scanning electron microscopy demonstrated significant differences in the particulate morphologies resulting from the different synthetic routes, which helps to explain the relatively rapid synthesis times of the glycine-nitrate process versus Pechini method.

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Report Number
DRDC-ATLANTIC-TM-2008-218 — Technical Memorandum
Date of publication
01 May 2009
Number of Pages
36
DSTKIM No
CA032912
CANDIS No
532139
Format(s):
Electronic Document(PDF)

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