Study on the Electrolyte Material BaCe1-xYxO3-δ’s Raman Spectra and Electrical Properties for Intermediate-Temperature Solid Oxide Fuel Cells

Jin Xia Wang; Jia Wen Jian; Yuan Yuan Gu

doi:10.4028/www.scientific.net/AMR.233-235.2419

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 233-235Study on the Electrolyte Material BaCe1-xYxO3-δ’s...

Study on the Electrolyte Material BaCe_1-xY_xO_3-δ’s Raman Spectra and Electrical Properties for Intermediate-Temperature Solid Oxide Fuel Cells

Abstract:

In this paper we used sol-gel method for synthesizing Y³⁺-doped BaCeO3 solid electrolyte BaCe_1-xY_xO_3-δ(x=0.10, 0.15, 0.20, 0.25, 0.30). The samples crystallized in a single perovskite phase by X-ray diffraction analysis after sintering at 1450°C in air for 10h; Raman spectrum measurements indicated that the increasing of Y³⁺doped content increased the crystal symmetry and increased the oxygen vacancy content for the samples, all Y³⁺ions were doped into the Ce-sites; The electric conductivities of the samples increased with Y content and reach a maximum at x=0.25, then decreased. The relationship between proton conductivity and Y dopant was closely related with oxygen vacancy content, crystal symmetry and the forming of defect association.