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Thermal stress analysis of solid oxide fuel cells with chromium poisoning cathodes

Zhang, Xiaoqiang ; Parbey, Joseph ; Yu, Guangsen ; Li, Tingshuai and Andersson, Martin LU (2018) In Journal of the Electrochemical Society 165(14). p.1224-1231
Abstract

Chromium(Cr) poisoning of the traditional LSM cathode is one of the most critical issues that accounts for instability of solid oxide fuel cells (SOFCs). The poisoning course will introduce alien species in the cathode active regions and it causes phase change and structure deformation, reducing the sites for electrochemical reactions. A 3D model is thus developed by coupling the computational fluid dynamics (CFD) approach with the finite element method to unravel the involved electrochemical processes in chromium poisoning of SOFCs. A function is proposed based on the experimental results to describe the distribution of Cr-related compounds in cathode. The results indicate that chromium poisoning can induce a dramatic decrease in the... (More)

Chromium(Cr) poisoning of the traditional LSM cathode is one of the most critical issues that accounts for instability of solid oxide fuel cells (SOFCs). The poisoning course will introduce alien species in the cathode active regions and it causes phase change and structure deformation, reducing the sites for electrochemical reactions. A 3D model is thus developed by coupling the computational fluid dynamics (CFD) approach with the finite element method to unravel the involved electrochemical processes in chromium poisoning of SOFCs. A function is proposed based on the experimental results to describe the distribution of Cr-related compounds in cathode. The results indicate that chromium poisoning can induce a dramatic decrease in the electric current density, which can also lead to increase of activation polarizations and lower the temperature. Three kinds of thermal stresses are strongly affected by the invasion of chromium into cathodes, which are all significantly reduced with the poisoning extent. The resulting conclusions are beneficial to deeply understand the Cr poisoning of SOFCs and also to material design to prevent cathodes from Cr-based interconnect attack.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fuel Cells - Solid oxide, Thermal Stress, Solid oxide fuel cell, Chromium Poisoning
in
Journal of the Electrochemical Society
volume
165
issue
14
pages
7 pages
publisher
Electrochemical Society
external identifiers
  • scopus:85066969756
ISSN
0013-4651
DOI
10.1149/2.1001814jes
language
English
LU publication?
yes
id
511349fb-20e6-4576-a1d7-05a15d9d239b
date added to LUP
2019-07-17 16:43:12
date last changed
2020-07-29 05:57:13
@article{511349fb-20e6-4576-a1d7-05a15d9d239b,
  abstract     = {<p>Chromium(Cr) poisoning of the traditional LSM cathode is one of the most critical issues that accounts for instability of solid oxide fuel cells (SOFCs). The poisoning course will introduce alien species in the cathode active regions and it causes phase change and structure deformation, reducing the sites for electrochemical reactions. A 3D model is thus developed by coupling the computational fluid dynamics (CFD) approach with the finite element method to unravel the involved electrochemical processes in chromium poisoning of SOFCs. A function is proposed based on the experimental results to describe the distribution of Cr-related compounds in cathode. The results indicate that chromium poisoning can induce a dramatic decrease in the electric current density, which can also lead to increase of activation polarizations and lower the temperature. Three kinds of thermal stresses are strongly affected by the invasion of chromium into cathodes, which are all significantly reduced with the poisoning extent. The resulting conclusions are beneficial to deeply understand the Cr poisoning of SOFCs and also to material design to prevent cathodes from Cr-based interconnect attack.</p>},
  author       = {Zhang, Xiaoqiang and Parbey, Joseph and Yu, Guangsen and Li, Tingshuai and Andersson, Martin},
  issn         = {0013-4651},
  language     = {eng},
  month        = {01},
  number       = {14},
  pages        = {1224--1231},
  publisher    = {Electrochemical Society},
  series       = {Journal of the Electrochemical Society},
  title        = {Thermal stress analysis of solid oxide fuel cells with chromium poisoning cathodes},
  url          = {http://dx.doi.org/10.1149/2.1001814jes},
  doi          = {10.1149/2.1001814jes},
  volume       = {165},
  year         = {2018},
}