Cellulose templating method for the preparation of La0.8Sr0.2Ga0.83Mg0.17O2.815 (LSGM) Solid oxide electrolyte

Abstract

La0.8Sr0.2Ga0.83Mg0.17O2.815 (LSGM) materials are synthesized with a fast and facile cellulose templating method for the first time and characterized by XRD, EIS, Archimedes method and SEM-EDS. LSGM powders with a phase purity of 91.7 mol% are obtained after the calcination at 1300 degrees C for 12h. SEM-EDS results indicate possible decomposition and reconstruction of the LSGM phase due to the diffusion of Sr-rich species to the grain boundaries for the sample sintered at 1500 degrees C for 6 h. Maximum conductivity value is found to be 4.2 x 10(-2) S cm(-1) at 800 degrees C for the sample calcined at 1300 degrees C for 12 h and sintered at 1400 degrees C for 6 h. Phase purity, stability and relative density are the important factors for obtaining high performance LSGM electrolytes. Therefore, cellulose templating method is a promising candidate for the preparation of LSGM electrolytes. (C) 2013 Elsevier Ltd. All rights reserved.