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

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

doi:10.1016/j.ssi.2018.08.016

Back

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

Journal article

Peer reviewed

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

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

Solid State Ionics, Vol.325, pp.176-188

2018

DOI: https://doi.org/10.1016/j.ssi.2018.08.016

Files and links (1)

url

https://doi.org/10.1016/j.ssi.2018.08.016View

Published Version

Abstract

solid oxide fuel cells

direct assembly

LSM cathodes

YSZ and GDC electrolyte

interface

Mn segregation

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.

Details

Title: Interface formation and Mn segregation of directly assembled La0.8Sr0.2MnO3 cathode on Y2O3-ZrO2 and Gd2O3-CeO2 electrolytes of solid oxide fuel cells
Authors: Shuai He (Author) - Curtin University
Kongfa Chen (Author) - Fuzhou University, People's Republic of China
Martin Saunders (Author) - University of Western Australia
Zakaria Quadir (Author) - Curtin University
Shanwen Tao (Author) - Monash University
John T S Irvine (Author) - University of St Andrews, United Kingdom
C Q Cui (Author) - Guangdong University of Technology, People's Republic of China
San Ping Jiang (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Publication details: Solid State Ionics, Vol.325, pp.176-188
Publisher: Elsevier BV
Date published: 2018
DOI: 10.1016/j.ssi.2018.08.016
ISSN: 0167-2738
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99451143702621
Output Type: Journal article

Metrics

2 File views/ downloads

205 Record Views

22 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Chemistry, Physical; Physics, Condensed Matter

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

Source: InCites