Atomic-resolution analysis of degradation phenomena in SOFCS : a case study of SO2 poisoning in LSM cathodes

Daio, Takeshi and Mitra, Pratoy and Lyth, Stephen M. and Sasaki, Kazunari (2016) Atomic-resolution analysis of degradation phenomena in SOFCS : a case study of SO2 poisoning in LSM cathodes. International Journal of Hydrogen Energy, 41 (28). pp. 12214-12221. ISSN 0360-3199 (https://doi.org/10.1016/j.ijhydene.2016.05.216)

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Abstract

Solid oxide fuel cell (SOFC) degradation studies are often performed by scanning transmission electron microscopy (STEM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). However, it is difficult to use these techniques to observe processes occurring at the smallest scales. Here, we study sulfur poisoning of La0.8Sr0.2MnO3−δ (LSM) cathodes as a model case for atomic resolution scanning transmission electron microscopy (STEM) analysis with energy dispersive X-ray diffraction (EDX). Significant SrSO4 nanoparticle formation is observed after SO2 exposure, especially at grain boundaries in the LSM. In addition, La2O3 formation inside the grain was also confirmed. The formation of SrSO4 is identified with irreversible SOFC degradation, in addition to simple SO2 adsorption, which is reversible.

ORCID iDs

Daio, Takeshi, Mitra, Pratoy, Lyth, Stephen M. ORCID logoORCID: https://orcid.org/0000-0001-9563-867X and Sasaki, Kazunari;
  • Item type:Article
    ID code:85459
    Dates:
    Date
    Event
    27 July 2016
    Published
    11 June 2016
    Published Online
    23 May 2016
    Accepted
    19 June 2015
    Submitted
    Notes:Funding Information: This research is supported by the Japan Science and Technology Agency (JST) through its “Center of Innovation” Science and Technology based Radical Innovation and Entrepreneurship Program (COI Program) to establish advanced analytical methods for fuel cells. The International Institute for Carbon-Neutral Energy Research is supported by World Premier International Research Center Initiative (WPI), MEXT, Japan . Publisher Copyright: © 2016 Hydrogen Energy Publications LLC Takeshi Daio, Pratoy Mitra, Stephen M. Lyth, Kazunari Sasaki, Atomic-resolution analysis of degradation phenomena in SOFCS: A case study of SO2 poisoning in LSM cathodes, International Journal of Hydrogen Energy, Volume 41, Issue 28, 2016, Pages 12214-12221, https://doi.org/10.1016/j.ijhydene.2016.05.216
    Subjects:Science > Chemistry
    Department:Faculty of Engineering > Chemical and Process Engineering
    Depositing user: Pure Administrator
    Date deposited:11 May 2023 09:47
    Last modified:11 Nov 2024 13:55
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/85459
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