Dey, Shoroshi and Mukhopadhyay, Jayanta and Lenka, Raja Kishora and Patro, Pankaj Kumar and Das Sharma, Abhijit and Mahata, Tarasankar and Basu, Rajendra Nath (2020) Synthesis and characterization of Nanocrystalline Ba0.6Sr0.4Co0.8Fe0.2O3 for application as an efficient anode in solid oxide electrolyser. International Journal of Hydrogen Energy, 45 (7). pp. 3995-4007. ISSN 0360-3199

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Nanocrystalline Ba0.6Sr0.4Co0.8Fe0.2O3 (BSCF-6482) powder is synthesized by combustion synthesis technique. Powder calcined at 1000 degrees C reveals phase pure cubic perovskite. Transmission electron microscopic (TEM) analysis exhibits soft agglomerates of average size similar to 50 nm wherein interplanar spacing for (110) and (221) resembles to the cubic lattice. While DC electrical conductivity of 23 S cm(-1)@800 degrees C is observed, interfacial polarization measured by electrochemical impedance spectroscopy is found to be the least 850 degrees C (0.18 Omega cm(2)). Cell performance has been compared among BSCF-6482, BSCF-5582 and LSCF-6482 mixed ionic and electronic conducting (MIEC) and conventional electrode (LSM). Higher performance (1.37 A/cm(2)@1.3 V,800 degrees C) with high hydrogen generation rate (0.57 Nl/cm(2)/h) is found during steam electrolysis with cell fabricated using BSCF-6482 having minimal area specific resistance 0.33 Omega cm(2). Under similar operating condition, BSCF-5582, LSCF-6482 and LSM exhibit hydrogen generation rate of 0.35, 0.28 and 0.23 Nl/cm(2)/h respectively. Cell microstructure is clinically correlated with the higher reactivity of BSCF-6482 air electrode in steam electrolysis. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Item Type: Article
Subjects: Electronics
Divisions: Fuel Cell and Battery
Depositing User: Bidhan Chaudhuri
Date Deposited: 08 Feb 2021 09:34
Last Modified: 08 Feb 2021 09:34

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