Dey, Shoroshi and Choudhury, Debasmita and Choudhuri, Mayuri and Bhattacharya, Abir and Mukhopadhyay, Jayanta and Das Sharma, Abhijit and Mukhopadhyay, Madhumita (2020) Facile synthesis of doped ceria-based oxide by co-precipitation technique and performance evaluation in solid oxide fuel cell. International Journal of Applied Ceramic Technology, 17 (4). pp. 1769-1784. ISSN 1546-542X

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Co-precipitated nanocrystalline gadolinium (Gd)-doped ceria (CeO2) has been synthesized with varying mole ratios of Gd in CeO2 from 0.1-0.8 with intricate maintenance of solution pH. Phase pure Gd-doped CeO2 (CGO) is obtained after calcination at 750 degrees C and depending on the mole % dopant concentration, the typical crystallite size is found to vary in the range 9-27 nm. Careful observation reveals that, calcined particle size decreases with the decrease in Gd content and an optimization of the particle size with exposed (111) stable] and (100) plane reactive] happens to occur for Ce0.8Gd0.2O2-delta (CG(0.8)). High resolution transmission electron micrograph of CG(0.8) reveals highly interpenetrating lattice planes corresponding to cubic fluorite structure. The effectivity of such CG(0.8) is further supported by its high electrical conductivity of 0.02 and 0.105 S/cm @ 600 and 700 degrees C respectively. The bulk impedances exhibit ohmic (R-0) and interfacial (R-p) polarizations to be 146 and 29.96 omega cm(2) at a temperature of 600 and 700 degrees C with activation energies 0.36 and 0.8 eV respectively. The application of CG(0.8) is further established as an interlayer in nickel oxide-yittria stabilized zirconia (NiO-YSZ)/YSZ/CGO/La-Sr-Co-Fe-based single cell with a current density of 1.2 A/cm(2) @ 0.5 V and 700 degrees C using hydrogen as the fuel and oxygen as the oxidant.

Item Type: Article
Subjects: Electronics
Divisions: Fuel Cell and Battery
Depositing User: Bidhan Chaudhuri
Date Deposited: 05 Feb 2021 11:18
Last Modified: 05 Feb 2021 11:18

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