The Improved Behavior of Gd Substituted BaCeYO₃ Nanocomposites for IT-SOFC Electrolytes

Abstract:

The Gd substituted BaCe_0.8Y_0.1O_3-δ nanocomposites were prepared by a modified Pechini route and then the prepared material was subjected to conventional sintering at 1400°C. The powder XRD results show that the material exhibit orthorhombic crystalline structure and the mean particle size were calculated to be ~40 nm. SEM micrographs indicate that the particle sizes were observed in the nanometer range with dense microstructure, which leads to increase in the densification of the material. FT-IR result confirms the presence of metal bondings in the material. DTA peaks observed at 725°C and 880°C show the crystallization of the material and the corresponding weight loss was recorded in the TG spectrum. I-V & I-P results show that the maximum open cell voltage (OCV) was measured at 1.1V and the maximum power density of about 801mWcm² was observed which may be due to the substitution of Gd ions into the BaCeYO₃ sites showing an improved electrochemical performance of IT-SOFC electrolytes.

• Periodical: Advanced Materials Research (Volume 584)
• Pages: 308-312
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.584.308
• Online since: October 2012
• Authors: Sruthi Kattamanchi, Rathinam Vasudevan, Ramasamy Jayavel, Singaravelu Ganesan
• Keywords: BaCeYO₃ Nanocomposites, IT-SOFC, I-V & I-P, Modified Pechini Technique

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