Skip to content

Research at St Andrews

Sol-gel Preparation and Characterisation of Dense Proton Conducting Sr3CaZr0.5Ta1.5O8.75 Thin Films

Research output: Contribution to journalArticlepeer-review

Author(s)

School/Research organisations

Abstract

Dense proton conducting Sr3CaZr0.5Ta1.5O8.75 films (similar to 1.25 mum, with grain size in the 200-400 nm range) were deposited, using the sol-gel method, on Al2O3-8%Y2O3-stabilised ZrO2 plates. The obtained gels were characterised by differential and thermogravimetric thermal analysis (DTA-TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results of a study of the structural and electrical properties of Sr3CaZr0.5Ta1.5O8.75 films deposited on the mentioned substrates are presented herein. The structural data for the gels and films were compared with those obtained for the same material prepared by solid state synthesis. Electrical properties of the sandwich-type structure were investigated by AC impedance conductivity measurements at different temperatures, in both dry and wet 5% H-2/Ar atmospheres. A careful analysis of the impedance spectra for this complex structure was performed, using a model with a series of five electrical circuits, having resistance and capacitance coupled in parallel. The specific responses observed in the impedance spectra were assigned to the corresponding substrate and layer contributions. A significant improvement, by an order of magnitude, in the electrode response was observed in the presence of the interleaving Sr3CaZr0.5Ta1.5O8.75 proton conducting layer, between the electrode and electrolyte. This enhancement is lost at temperatures above that at which the Sr3CaZr0.5Ta1.5O8.75 dehydrates and its protonic conductivity diminishes. Considering the structural and electrical characterisation results, these Sr3CaZr0.5Ta1.5O8.75 sol- erived films have a potential use for proton conducting electrolyte or intermediate layer in fuel cells. (C) 2002 Elsevier Science B.V. All rights reserved.

Close

Details

Original languageEnglish
Pages (from-to)295-308
Number of pages14
JournalSolid State Ionics
Volume150
Publication statusPublished - Oct 2002

    Research areas

  • mixed oxides, proton conductors, thin films, sol-gel method

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Microwave irradiation synthesis to obtain La0.7-xPrxCa0.3MnO3 perovskites: electrical and electrochemical performance

    Ferrel-Alvarez, A. C., Domínguez-Crespo, M. A., Cong, H., Torres-Huerta, A. M., Palma-Ramírez, D. & Irvine, J. T. S., 15 Jan 2021, In: Journal of Alloys and Compounds. 851, 156882.

    Research output: Contribution to journalArticlepeer-review

  2. Graphitic-C3N4 coated floating glass beads for photocatalytic destruction of synthetic and natural organic compounds in water under UV light

    Hui, J., Pestana, C. J., Caux, M., Gunaratne, H. Q. N., Edwards, C., Robertson, P. K. J., Lawton, L. A. & Irvine, J. T. S., 15 Jan 2021, In: Journal of Photochemistry and Photobiology A: Chemistry. 405, 112935.

    Research output: Contribution to journalArticlepeer-review

  3. Activation of anion redox in P3 structure cobalt-doped sodium manganese oxide via introduction of transition metal vacancies

    Kim, E. J., Mofredj, K., Pickup, D., Chadwick, A., Irvine, J. T. S. & Armstrong, R., 1 Jan 2021, In: Journal of Power Sources. 481, 229010.

    Research output: Contribution to journalArticlepeer-review

  4. A Ce/Ru codoped SrFeO3−δ perovskite for a coke-resistant anode of a symmetrical solid oxide fuel cell

    Li, B., He, S., Li, J., Yue, X., Irvine, J. T. S., Xie, D., Ni, J. & Ni, C., 18 Dec 2020, In: ACS Catalysis. 10, 24, p. 14398-14409 12 p.

    Research output: Contribution to journalArticlepeer-review

  5. Photocatalytic removal of the cyanobacterium Microcystis aeruginosa PCC7813 and four microcystins by TiO2 coated porous glass beads with UV-LED irradiation

    Pestana, C. J., Portela Noronha, J., Hui, J., Edwards, C., Gunaratne, H. Q. N., Irvine, J. T. S., Robertson, P. K. J., Capelo-Neto, J. & Lawton, L. A., 25 Nov 2020, In: Science of the Total Environment. 745, 141154.

    Research output: Contribution to journalArticlepeer-review

Related by journal

  1. Evaluating sulfur-tolerance of metal/Ce0.80Gd0.20O1.90 co-impregnated La0.20Sr0.25Ca0.45TiO3 anodes for solid oxide fuel cells

    Price, R., Grolig, J. G., Mai, A. & Irvine, J. T. S., Apr 2020, In: Solid State Ionics. 347, 115254.

    Research output: Contribution to journalArticlepeer-review

  2. Oxygen ion conductivity in ceria-based electrolytes co-doped with samarium and gadolinium

    Coles-Aldridge, A. V. & Baker, R. T., Apr 2020, In: Solid State Ionics. 347, 115255.

    Research output: Contribution to journalArticlepeer-review

  3. Interface formation and Mn segregation of directly assembled La0.8Sr0.2MnO3 cathode on Y2O3-ZrO2 and Gd2O3-CeO2 electrolytes of solid oxide fuel cells

    He, S., Chen, K., Saunders, M., Quadir, Z., Tao, S., Irvine, J. T. S., Cui, C. Q. & Jiang, S. P., 1 Nov 2018, In: Solid State Ionics. 325, p. 176-188 13 p.

    Research output: Contribution to journalArticlepeer-review

  4. Ionic conductivity in multiply substituted ceria-based electrolytes

    Coles-Aldridge, A. V. & Baker, R. T., Mar 2018, In: Solid State Ionics. 316, p. 9-19 11 p.

    Research output: Contribution to journalArticlepeer-review

  5. Metal-oxide interactions for infiltrated Ni nanoparticles on A-site deficient LaxSr1 − 3x/2TiO3

    Hui, J., Neagu, D., Miller, D. N., Yue, X., Ni, C. & Irvine, J. T. S., Feb 2018, In: Solid State Ionics. 315, p. 126-130 5 p.

    Research output: Contribution to journalArticlepeer-review

ID: 197471

Top