Skip to content

Research at St Andrews

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

Research output: Contribution to journalArticle

Open Access Status

  • Embargoed (until 31/08/19)

Author(s)

Shuai He, Kongfa Chen, Martin Saunders, Zakaria Quadir, Shanwen Tao, John T.S. Irvine, C.Q. Cui, San Ping Jiang

School/Research organisations

Abstract

The establishment of intimate electrode/electrolyte interface is very important in solid oxide fuel cells (SOFCs), because it plays a critical role in the overall cell performance and durability. In this study, Mn segregation and interface formation between directly assembled La0.8Sr0.2MnO3 (LSM) electrode and yttrium-stabilized zirconia (YSZ) or gadolinium-doped ceria (GDC) electrolytes are studied using combined focused ion beam and scanning transmission electron microscopy (FIB-STEM). In the case of LSM/YSZ and LSM/GDC electrodes, a significant reduction in the electrode ohmic resistance is observed after cathodic polarization at 900 °C and 500 mA cm−2, indicating the formation of an intimate interface. However, LSM particles start to disintegrate at the electrode/electrolyte interface with the increase of polarization time in the case of LSM/YSZ electrode. On the other hand, the LSM/GDC interface is very stable with negligible microstructure change at the interface. Mn segregation from the LSM perovskite structure is identified under the influence of polarization in both LSM/YSZ and LSM/GDC electrodes. The results demonstrate that nature of the electrolyte plays a critical role in the electrochemical activity, microstructure, morphology and stability of LSM/electrolyte interface under SOFC operation conditions.
Close

Details

Original languageEnglish
Pages (from-to)176-188
Number of pages13
JournalSolid State Ionics
Volume325
Early online date31 Aug 2018
DOIs
StatePublished - 1 Nov 2018

    Research areas

  • Solid oxide fuel cells, Direct assembly, LSM cathodes, YSZ and GDC electrolyte, Interface, Mn segregation

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

View graph of relations

Related by author

  1. Control of spatially homogeneous distribution of heteroatoms to produce red TiO2 photocatalyst for visible-light photocatalytic water splitting

    Hong, X., Tan, J., Zhu, H., Feng, N., Yang, Y., Irvine, J., Wang, L., Liu, G. & Cheng, H-M. 2 Jan 2019 In : Chemistry - A European Journal. Early View

    Research output: Contribution to journalArticle

  2. Electrodeposited NiCu bimetal on carbon paper as stable non-noble anode for efficient electrooxidation of ammonia

    Xu, W., Du, D., Lan, R., Humphreys, J., Miller, D. N., Walker, M., Wu, Z., Irvine, J. T. S. & Tao, S. 5 Dec 2018 In : Applied Catalysis B: Environmental. 237, p. 1101-1109

    Research output: Contribution to journalArticle

  3. Analytical solution to heat transfer in compressible laminar flow in a flat minichannel

    Bao, C., Jiang, Z., Zhang, X. & Irvine, J. T. S. Dec 2018 In : International Journal of Heat and Mass Transfer. 127, Part C, p. 975-988 14 p.

    Research output: Contribution to journalArticle

  4. In-situ studies of high temperature thermal batteries: a perspective

    Payne, J. L., Giagloglou, K., Carins, G. M., Crouch, C., Percival, J. D., Smith, R. I., Gover, R. & Irvine, J. T. S. 20 Nov 2018 In : Frontiers in Energy Research. 6, 6 p., 121

    Research output: Contribution to journalArticle

  5. Welcome to JPhys Energy

    Irvine, J. 20 Nov 2018 In : Journal of Physics: Energy. 1, 1, 1 p., 010401

    Research output: Contribution to journalEditorial

Related by journal

  1. 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 journalArticle

  2. 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 journalArticle

  3. Wet chemical synthesis and characterisation of Ba0.5Sr0.5Ce0.6Zr0.2Gd0.1Y0.1O3 − δ proton conductor

    Naeem Khan, M., Savaniu, C. D., Azad, A. K., Hing, P. & Irvine, J. T. S. May 2017 In : Solid State Ionics. 303, p. 52-57 6 p.

    Research output: Contribution to journalArticle

  4. Flux investigations on composite (La0.8Sr0.2)0.95Cr0.5Fe0.5O3 − δ–Sc0.198Ce0.012Zr0.789O1.90 oxygen transport membranes

    Dehaney-Steven, Z. A., Papargyriou, D. & Irvine, J. T. S. May 2016 In : Solid State Ionics. 288, p. 338-341 4 p.

    Research output: Contribution to journalArticle

ID: 255716928