Synthesis of BaCe0.9-xZrxY0.1O3-δ nanopowders and the study of proton conductors fabricated on their basis by low-temperature spark plasma sintering. (26th July 2019)

• Record Type: Journal Article
• Authors: Simonenko, Tatiana L.; Kalinina, Marina V.; Simonenko, Nikolay P.; Simonenko, Elizaveta P.; Glumov, Oleg V.; Mel'nikova, Natalia A.; Murin, Igor V.; Shichalin, Oleg O.; Papynov, Evgeniy K.; Shilova, Olga A.; Sevastyanov, Vladimir G.; Kuznetsov, Nikolay T.
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 36(2019)
• Page Start: 20345
• Page End: 20354
• Publication Date: 2019-07-26
• Subjects: Citrate-nitrate synthesis -- BCZY -- PCFC -- Solid electrolyte -- Proton conductors -- Spark plasma sintering; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.05.231
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Using a citrate-nitrate process, BaCe0.9-x Zrx Y0.1 O3-δ (x = 0, 0.5, 0.6, 0.7 and 0.8) nanopowders were synthesized, on the basis of which proton-conducting solid electrolytes (average size of coherent scattering region (CSR) - 15–53 nm) were obtained by spark plasma sintering (SPS) at a low temperature (900°С). The dependence of phase composition, microstructure and electrophysical properties of the obtained samples on ZrO2 content and consolidation conditions was established. It was found that the BaCe0.4 Zr0, 5 Y0.1 O3-δ solid solution had the highest electrical conductivity among zirconium-containing ceramic materials in the studied concentration range. It was shown that SPS is a promising method for obtaining solid electrolytes for proton-conducting solid oxide fuel cells (PCFC) at lower temperatures (by 400–500°С), compared to traditionally-used temperature conditions (1400–1800 °C). Highlights: BaCe0.9-x Zrx Y0.1 O3-δ (BCZY) nanopowders were synthesized by a citrate-nitrate method. Spark plasma sintering (900 °C) was used to consolidate the obtained powders. Electrical conductivity measurements were carried out at different humidity levels. Energy efficient technology for BCZY electrolytes fabrication has been developed.