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Mechanism of chromium poisoning the conventional cathode material for solid oxide fuel cells

Zhang, Xiaoqiang; Yu, Guangsen; Zeng, Shumao; Parbey, Joseph; Xiao, Shuhao; Li, Baihai; Li, Tingshuai and Andersson, Martin LU (2018) In Journal of Power Sources 381. p.26-29
Abstract

Chromium poisoning the La0.875Sr0.125MnO3 (LSM) cathode for solid oxide fuel cells is a critical issue that can strongly affect the stability. In this study, we evaluate the temperature distribution in a SOFC based on a 3D model and then combine conductivity test and material computation to reveal the effects of chromium in SUS430 stainless steels on LSM conductivities. The starch concentration in LSM pellets and the applied pressure on the contact with interconnect materials show close relationships with the chromium poisoning behavior. The density functional theory (DFT) computing results indicate that chromium atoms preferably adsorb on the MnO2-terminated and La (Sr)-O-terminated (001)... (More)

Chromium poisoning the La0.875Sr0.125MnO3 (LSM) cathode for solid oxide fuel cells is a critical issue that can strongly affect the stability. In this study, we evaluate the temperature distribution in a SOFC based on a 3D model and then combine conductivity test and material computation to reveal the effects of chromium in SUS430 stainless steels on LSM conductivities. The starch concentration in LSM pellets and the applied pressure on the contact with interconnect materials show close relationships with the chromium poisoning behavior. The density functional theory (DFT) computing results indicate that chromium atoms preferably adsorb on the MnO2-terminated and La (Sr)-O-terminated (001) surfaces. The resulting conclusions are expected to deeply understand mechanism of chromium deactivating conventional cathodes at some typical operational conditions, and offer crucial information to optimize the structure to avoid the poisoning effect.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Chromium, Conductivity, Poisoning, Solid oxide fuel cell
in
Journal of Power Sources
volume
381
pages
4 pages
publisher
Elsevier
external identifiers
  • scopus:85041540314
ISSN
0378-7753
DOI
10.1016/j.jpowsour.2018.01.072
language
English
LU publication?
yes
id
95804ac4-4ffe-4660-9bba-f3b71b19e3bc
date added to LUP
2018-02-20 11:59:54
date last changed
2018-05-29 12:28:57
@article{95804ac4-4ffe-4660-9bba-f3b71b19e3bc,
  abstract     = {<p>Chromium poisoning the La<sub>0.875</sub>Sr<sub>0.125</sub>MnO<sub>3</sub> (LSM) cathode for solid oxide fuel cells is a critical issue that can strongly affect the stability. In this study, we evaluate the temperature distribution in a SOFC based on a 3D model and then combine conductivity test and material computation to reveal the effects of chromium in SUS430 stainless steels on LSM conductivities. The starch concentration in LSM pellets and the applied pressure on the contact with interconnect materials show close relationships with the chromium poisoning behavior. The density functional theory (DFT) computing results indicate that chromium atoms preferably adsorb on the MnO<sub>2</sub>-terminated and La (Sr)-O-terminated (001) surfaces. The resulting conclusions are expected to deeply understand mechanism of chromium deactivating conventional cathodes at some typical operational conditions, and offer crucial information to optimize the structure to avoid the poisoning effect.</p>},
  author       = {Zhang, Xiaoqiang and Yu, Guangsen and Zeng, Shumao and Parbey, Joseph and Xiao, Shuhao and Li, Baihai and Li, Tingshuai and Andersson, Martin},
  issn         = {0378-7753},
  keyword      = {Chromium,Conductivity,Poisoning,Solid oxide fuel cell},
  language     = {eng},
  month        = {03},
  pages        = {26--29},
  publisher    = {Elsevier},
  series       = {Journal of Power Sources},
  title        = {Mechanism of chromium poisoning the conventional cathode material for solid oxide fuel cells},
  url          = {http://dx.doi.org/10.1016/j.jpowsour.2018.01.072},
  volume       = {381},
  year         = {2018},
}