Development of La0.6Sr0.4Co0.2Fe 0.8O3-δ cathode with an improved stability via La0.8Sr0.2MnO3-film impregnation

Xingbao Zhu; Dong Ding; Yiqian Li; Zhe Lü; Wenhui Su; Liang Zhen

doi:10.1016/j.ijhydene.2013.02.091

Development of La_0.6Sr_0.4Co_0.2Fe _0.8O_3-δ cathode with an improved stability via La_0.8Sr_0.2MnO₃-film impregnation

Xingbao Zhu^*
, Dong Ding
, Yiqian Li
, Zhe Lü
, Wenhui Su
, Liang Zhen

^*Corresponding author for this work

School of Physics

Harbin Institute of Technology
Georgia Institute of Technology
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Uniform, dense and continuous coatings of La_0.8Sr _0.2MnO_3-δ (LSM) have been successfully deposited on dense/porous La_0.6Sr_0.4Co_0.2Fe _0.8O_3-δ (LSCF) substrates via a one-step drop-coating process using a water-based solution in order to improve the operating stability of solid oxide fuel cell cathode. The processing conditions were optimized by precise control of the composition of infiltrating solution, including chelating agents (glycine, citric acid and ethylene glycol), surfactants (polyvinyl alcohol (PVA), polyethylene glycol (PEG) and polyvinyl pyrrolidone (PVP)) and pH values (5.25, 4.29, 3.01 and 2.09). Ethanol was found to improve the wetting ability of the water-based solution significantly, but unfortunately causing precipitation. The symmetrical and full cells tests demonstrated that both performance and stability of LSCF cathode can be enhanced by surface modification with an optimized LSM film coating, leading to ∼31% reduction in cathodic polarization resistance and ∼45% improvement in power density (without observable degradation) for almost 350 h operation at 750 °C under a constant voltage of 0.7 V. Crown

Original language	English
Pages (from-to)	5375-5382
Number of pages	8
Journal	International Journal of Hydrogen Energy
Volume	38
Issue number	13
DOIs	https://doi.org/10.1016/j.ijhydene.2013.02.091
State	Published - 1 May 2013

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Aqueous solution
Epitaxial film
LSCF
LSM
SOFC cathodes
Sol-gel

Access to Document

10.1016/j.ijhydene.2013.02.091

Cite this

@article{847df3544a2840248a71f7c435897db3,

title = "Development of La0.6Sr0.4Co0.2Fe 0.8O3-δ cathode with an improved stability via La0.8Sr0.2MnO3-film impregnation",

abstract = "Uniform, dense and continuous coatings of La0.8Sr 0.2MnO3-δ (LSM) have been successfully deposited on dense/porous La0.6Sr0.4Co0.2Fe 0.8O3-δ (LSCF) substrates via a one-step drop-coating process using a water-based solution in order to improve the operating stability of solid oxide fuel cell cathode. The processing conditions were optimized by precise control of the composition of infiltrating solution, including chelating agents (glycine, citric acid and ethylene glycol), surfactants (polyvinyl alcohol (PVA), polyethylene glycol (PEG) and polyvinyl pyrrolidone (PVP)) and pH values (5.25, 4.29, 3.01 and 2.09). Ethanol was found to improve the wetting ability of the water-based solution significantly, but unfortunately causing precipitation. The symmetrical and full cells tests demonstrated that both performance and stability of LSCF cathode can be enhanced by surface modification with an optimized LSM film coating, leading to ∼31\% reduction in cathodic polarization resistance and ∼45\% improvement in power density (without observable degradation) for almost 350 h operation at 750 °C under a constant voltage of 0.7 V. Crown",

keywords = "Aqueous solution, Epitaxial film, LSCF, LSM, SOFC cathodes, Sol-gel",

author = "Xingbao Zhu and Dong Ding and Yiqian Li and Zhe L{\"u} and Wenhui Su and Liang Zhen",

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AU - Zhu, Xingbao

AU - Ding, Dong

AU - Li, Yiqian

AU - Lü, Zhe

AU - Su, Wenhui

AU - Zhen, Liang

PY - 2013/5/1

Y1 - 2013/5/1

N2 - Uniform, dense and continuous coatings of La0.8Sr 0.2MnO3-δ (LSM) have been successfully deposited on dense/porous La0.6Sr0.4Co0.2Fe 0.8O3-δ (LSCF) substrates via a one-step drop-coating process using a water-based solution in order to improve the operating stability of solid oxide fuel cell cathode. The processing conditions were optimized by precise control of the composition of infiltrating solution, including chelating agents (glycine, citric acid and ethylene glycol), surfactants (polyvinyl alcohol (PVA), polyethylene glycol (PEG) and polyvinyl pyrrolidone (PVP)) and pH values (5.25, 4.29, 3.01 and 2.09). Ethanol was found to improve the wetting ability of the water-based solution significantly, but unfortunately causing precipitation. The symmetrical and full cells tests demonstrated that both performance and stability of LSCF cathode can be enhanced by surface modification with an optimized LSM film coating, leading to ∼31% reduction in cathodic polarization resistance and ∼45% improvement in power density (without observable degradation) for almost 350 h operation at 750 °C under a constant voltage of 0.7 V. Crown

AB - Uniform, dense and continuous coatings of La0.8Sr 0.2MnO3-δ (LSM) have been successfully deposited on dense/porous La0.6Sr0.4Co0.2Fe 0.8O3-δ (LSCF) substrates via a one-step drop-coating process using a water-based solution in order to improve the operating stability of solid oxide fuel cell cathode. The processing conditions were optimized by precise control of the composition of infiltrating solution, including chelating agents (glycine, citric acid and ethylene glycol), surfactants (polyvinyl alcohol (PVA), polyethylene glycol (PEG) and polyvinyl pyrrolidone (PVP)) and pH values (5.25, 4.29, 3.01 and 2.09). Ethanol was found to improve the wetting ability of the water-based solution significantly, but unfortunately causing precipitation. The symmetrical and full cells tests demonstrated that both performance and stability of LSCF cathode can be enhanced by surface modification with an optimized LSM film coating, leading to ∼31% reduction in cathodic polarization resistance and ∼45% improvement in power density (without observable degradation) for almost 350 h operation at 750 °C under a constant voltage of 0.7 V. Crown

KW - Aqueous solution

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KW - LSM

KW - SOFC cathodes

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