Enhancement in surface exchange coefficient and electrochemical performance of Sr2Fe1.5Mo0.5O6 electrodes by Ce0.8Sm0.2O1.9 nanoparticles

Lei Zhang; Yiqun Liu; Yanxiang Zhang; Guoliang Xiao; Fanglin Chen; Changrong Xia

doi:10.1016/j.elecom.2011.04.017

Enhancement in surface exchange coefficient and electrochemical performance of Sr₂Fe_1.5Mo_0.5O₆ electrodes by Ce_0.8Sm_0.2O_1.9 nanoparticles

Lei Zhang
, Yiqun Liu
, Yanxiang Zhang
, Guoliang Xiao
, Fanglin Chen
, Changrong Xia^*

^*Corresponding author for this work

University of Science and Technology of China
University of South Carolina

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

82 Scopus citations

Abstract

Sr₂Fe_1.5Mo_0.5O₆ is a mixed ionic and electronic conductor which can be applied as both cathode and anode material in intermediate-temperature solid oxide fuel cells. To enhance its cathode performance, Ce_0.8Sm_0.2O_1.9 nanoparticles are deposited using ion impregnation technique. Impedance spectroscopy shows that the nanoparticles are very effective in reducing the interfacial polarization resistance from 0.27 Ω cm² to 0.11 Ω cm² at 750 °C. Electrical conductivity relaxation (ECR) measurement demonstrates that the surface exchange coefficient of Sr ₂Fe_1.5Mo_0.5O₆ is significantly improved by the nanoparticles, from 10^{- 5} to 10^{- 3} cms^{- 1} at 750 °C. The results suggest that doped ceria nanoparticles are very promising in enhancing the surface exchange processes and consequently can greatly improve the electrode performance.

Original language	English
Pages (from-to)	711-713
Number of pages	3
Journal	Electrochemistry Communications
Volume	13
Issue number	7
DOIs	https://doi.org/10.1016/j.elecom.2011.04.017
State	Published - Jul 2011
Externally published	Yes

Keywords

Doped ceria
Electrical conductivity relaxation
Nanostructured electrode
Solid oxide fuel cells
Surface exchange coefficient

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10.1016/j.elecom.2011.04.017

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@article{67cdea4d40ae44fea5ad95a3d332b2fe,

title = "Enhancement in surface exchange coefficient and electrochemical performance of Sr2Fe1.5Mo0.5O6 electrodes by Ce0.8Sm0.2O1.9 nanoparticles",

abstract = "Sr2Fe1.5Mo0.5O6 is a mixed ionic and electronic conductor which can be applied as both cathode and anode material in intermediate-temperature solid oxide fuel cells. To enhance its cathode performance, Ce0.8Sm0.2O1.9 nanoparticles are deposited using ion impregnation technique. Impedance spectroscopy shows that the nanoparticles are very effective in reducing the interfacial polarization resistance from 0.27 Ω cm2 to 0.11 Ω cm2 at 750 °C. Electrical conductivity relaxation (ECR) measurement demonstrates that the surface exchange coefficient of Sr 2Fe1.5Mo0.5O6 is significantly improved by the nanoparticles, from 10- 5 to 10- 3 cms- 1 at 750 °C. The results suggest that doped ceria nanoparticles are very promising in enhancing the surface exchange processes and consequently can greatly improve the electrode performance.",

keywords = "Doped ceria, Electrical conductivity relaxation, Nanostructured electrode, Solid oxide fuel cells, Surface exchange coefficient",

author = "Lei Zhang and Yiqun Liu and Yanxiang Zhang and Guoliang Xiao and Fanglin Chen and Changrong Xia",

year = "2011",

month = jul,

doi = "10.1016/j.elecom.2011.04.017",

language = "英语",

volume = "13",

pages = "711--713",

journal = "Electrochemistry Communications",

issn = "1388-2481",

publisher = "Elsevier Inc.",

number = "7",

}

TY - JOUR

T1 - Enhancement in surface exchange coefficient and electrochemical performance of Sr2Fe1.5Mo0.5O6 electrodes by Ce0.8Sm0.2O1.9 nanoparticles

AU - Zhang, Lei

AU - Liu, Yiqun

AU - Zhang, Yanxiang

AU - Xiao, Guoliang

AU - Chen, Fanglin

AU - Xia, Changrong

PY - 2011/7

Y1 - 2011/7

N2 - Sr2Fe1.5Mo0.5O6 is a mixed ionic and electronic conductor which can be applied as both cathode and anode material in intermediate-temperature solid oxide fuel cells. To enhance its cathode performance, Ce0.8Sm0.2O1.9 nanoparticles are deposited using ion impregnation technique. Impedance spectroscopy shows that the nanoparticles are very effective in reducing the interfacial polarization resistance from 0.27 Ω cm2 to 0.11 Ω cm2 at 750 °C. Electrical conductivity relaxation (ECR) measurement demonstrates that the surface exchange coefficient of Sr 2Fe1.5Mo0.5O6 is significantly improved by the nanoparticles, from 10- 5 to 10- 3 cms- 1 at 750 °C. The results suggest that doped ceria nanoparticles are very promising in enhancing the surface exchange processes and consequently can greatly improve the electrode performance.

AB - Sr2Fe1.5Mo0.5O6 is a mixed ionic and electronic conductor which can be applied as both cathode and anode material in intermediate-temperature solid oxide fuel cells. To enhance its cathode performance, Ce0.8Sm0.2O1.9 nanoparticles are deposited using ion impregnation technique. Impedance spectroscopy shows that the nanoparticles are very effective in reducing the interfacial polarization resistance from 0.27 Ω cm2 to 0.11 Ω cm2 at 750 °C. Electrical conductivity relaxation (ECR) measurement demonstrates that the surface exchange coefficient of Sr 2Fe1.5Mo0.5O6 is significantly improved by the nanoparticles, from 10- 5 to 10- 3 cms- 1 at 750 °C. The results suggest that doped ceria nanoparticles are very promising in enhancing the surface exchange processes and consequently can greatly improve the electrode performance.

KW - Doped ceria

KW - Electrical conductivity relaxation

KW - Nanostructured electrode

KW - Solid oxide fuel cells

KW - Surface exchange coefficient

UR - https://www.scopus.com/pages/publications/79958189545

U2 - 10.1016/j.elecom.2011.04.017

DO - 10.1016/j.elecom.2011.04.017

M3 - 文章

AN - SCOPUS:79958189545

SN - 1388-2481

VL - 13

SP - 711

EP - 713

JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 7

ER -

Enhancement in surface exchange coefficient and electrochemical performance of Sr₂Fe_1.5Mo_0.5O₆ electrodes by Ce_0.8Sm_0.2O_1.9 nanoparticles

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Keywords

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