A model for the delamination kinetics of La0.8Sr0.2MnO3oxygen electrodes of solid oxide electrolysis cells

Yanxiang Zhang; Kongfa Chen; Changrong Xia; San Ping Jiang; Meng Ni

doi:10.1016/j.ijhydene.2012.07.062

A model for the delamination kinetics of La_0.8Sr_0.2MnO₃oxygen electrodes of solid oxide electrolysis cells

Yanxiang Zhang, Kongfa Chen, Changrong Xia, San Ping Jiang, Meng Ni

Research output: Journal article publication › Journal article › Academic research › peer-review

37 Citations (Scopus)

Abstract

A theoretical model is developed to simulate the delamination kinetics of La0.8Sr0.2MnO3(LSM) electrode from YSZ electrolyte in solid oxide electrolysis cells (SOECs). The delamination is caused by the total stress including the internal oxygen pressure in LSM near the electrode/electrolyte interface, and the tensile stress by the oxygen migration from the YSZ electrolyte to LSM lattice. Weibull theory is used to determine the survival probability of electrode/electrolyte interface under the total stress. The relaxation time corresponding to the time for oxygen diffusion from the interface to the microcracks in La0.8Sr0.2MnO3links the survival probability with polarization time, thus the survival interface area can be predicted with varying anodic polarization time. The model is validated with experimental data. The effects of applied anodic current and operating temperature are discussed. The present model provides a starting point to study more complex cases, such as composite oxygen electrodes.

Original language	English
Pages (from-to)	13914-13920
Number of pages	7
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	19
DOIs	https://doi.org/10.1016/j.ijhydene.2012.07.062
Publication status	Published - 1 Oct 2012

Keywords

Degradation
Delamination
Model
Solid oxide electrochemical cells
Weibull theory

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

More information

10.1016/j.ijhydene.2012.07.062

http://hdl.handle.net/10397/5188

Cite this

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title = "A model for the delamination kinetics of La0.8Sr0.2MnO3oxygen electrodes of solid oxide electrolysis cells",

abstract = "A theoretical model is developed to simulate the delamination kinetics of La0.8Sr0.2MnO3(LSM) electrode from YSZ electrolyte in solid oxide electrolysis cells (SOECs). The delamination is caused by the total stress including the internal oxygen pressure in LSM near the electrode/electrolyte interface, and the tensile stress by the oxygen migration from the YSZ electrolyte to LSM lattice. Weibull theory is used to determine the survival probability of electrode/electrolyte interface under the total stress. The relaxation time corresponding to the time for oxygen diffusion from the interface to the microcracks in La0.8Sr0.2MnO3links the survival probability with polarization time, thus the survival interface area can be predicted with varying anodic polarization time. The model is validated with experimental data. The effects of applied anodic current and operating temperature are discussed. The present model provides a starting point to study more complex cases, such as composite oxygen electrodes.",

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author = "Yanxiang Zhang and Kongfa Chen and Changrong Xia and Jiang, {San Ping} and Meng Ni",

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AU - Zhang, Yanxiang

AU - Chen, Kongfa

AU - Xia, Changrong

AU - Jiang, San Ping

AU - Ni, Meng

PY - 2012/10/1

Y1 - 2012/10/1

N2 - A theoretical model is developed to simulate the delamination kinetics of La0.8Sr0.2MnO3(LSM) electrode from YSZ electrolyte in solid oxide electrolysis cells (SOECs). The delamination is caused by the total stress including the internal oxygen pressure in LSM near the electrode/electrolyte interface, and the tensile stress by the oxygen migration from the YSZ electrolyte to LSM lattice. Weibull theory is used to determine the survival probability of electrode/electrolyte interface under the total stress. The relaxation time corresponding to the time for oxygen diffusion from the interface to the microcracks in La0.8Sr0.2MnO3links the survival probability with polarization time, thus the survival interface area can be predicted with varying anodic polarization time. The model is validated with experimental data. The effects of applied anodic current and operating temperature are discussed. The present model provides a starting point to study more complex cases, such as composite oxygen electrodes.

AB - A theoretical model is developed to simulate the delamination kinetics of La0.8Sr0.2MnO3(LSM) electrode from YSZ electrolyte in solid oxide electrolysis cells (SOECs). The delamination is caused by the total stress including the internal oxygen pressure in LSM near the electrode/electrolyte interface, and the tensile stress by the oxygen migration from the YSZ electrolyte to LSM lattice. Weibull theory is used to determine the survival probability of electrode/electrolyte interface under the total stress. The relaxation time corresponding to the time for oxygen diffusion from the interface to the microcracks in La0.8Sr0.2MnO3links the survival probability with polarization time, thus the survival interface area can be predicted with varying anodic polarization time. The model is validated with experimental data. The effects of applied anodic current and operating temperature are discussed. The present model provides a starting point to study more complex cases, such as composite oxygen electrodes.

KW - Degradation

KW - Delamination

KW - Model

KW - Solid oxide electrochemical cells

KW - Weibull theory

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