Improvement of the performance of fuel cells anodes with Sm3+ doped CeO2

Shi Zhong Wang, Tatsumi Ishihara

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Various Ni-15% Sm3+(x) doped CeO2(Ni-SDC) composite anodes prepared by impregnation method were studied to unveil the role of SDC in improving the performance of Ni anode. The electrochemical properties and the power generation characteristics of the cells based on these anodes show that the performance of the cells were improved significantly by the addition of SDC into Ni due to the reduced ohmic resistance and anodic overpotential. The decrease of anodic overpotential after the introduction of SDC could be due to the extension of three-phase-boundary (TPB) and the increase of active sites for H2 oxidation. However, the introduction of SDC also leaded to an increase of activation energy, which resulted in a higher anodic overpotential for Ni-SDC anodes at low temperatures compared with pure Ni. The impedance spectra of Ni-SDC anode consisted of two arcs at high temperatures. The high frequency arc increased with the amount of SDC, while the low frequency arc showed no dependency on the amount of SDC. The high frequency arc could be related to the charge transfer reaction at TPB, and the low frequency arc could correspond to the disassociative adsorption of H2 and the following diffusion processes. 75% (w) Ni-25% (w) SDC/LSGM/SSC exhibited the highest power density among the cells studied, and the highest power density at 1073, 973, 873 K reached 1.1, 0. 43, 0. 14 W·cm-2, respectively. The cells also showed good stability.

Original languageEnglish
Pages (from-to)844-848
Number of pages5
JournalActa Physico - Chimica Sinica
Volume19
Issue number9
Publication statusPublished - Sep 1 2003
Externally publishedYes

Fingerprint

cell anodes
fuel cells
Fuel cells
Anodes
anodes
arcs
Phase boundaries
cells
radiant flux density
low frequencies
Acoustic impedance
Electrochemical properties
Impregnation
Power generation
Charge transfer
Activation energy
charge transfer
impedance
activation energy
Adsorption

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Cite this

Improvement of the performance of fuel cells anodes with Sm3+ doped CeO2. / Wang, Shi Zhong; Ishihara, Tatsumi.

In: Acta Physico - Chimica Sinica, Vol. 19, No. 9, 01.09.2003, p. 844-848.

Research output: Contribution to journalArticle

@article{2310577f87b2437fbb3490e31372e479,
title = "Improvement of the performance of fuel cells anodes with Sm3+ doped CeO2",
abstract = "Various Ni-15{\%} Sm3+(x) doped CeO2(Ni-SDC) composite anodes prepared by impregnation method were studied to unveil the role of SDC in improving the performance of Ni anode. The electrochemical properties and the power generation characteristics of the cells based on these anodes show that the performance of the cells were improved significantly by the addition of SDC into Ni due to the reduced ohmic resistance and anodic overpotential. The decrease of anodic overpotential after the introduction of SDC could be due to the extension of three-phase-boundary (TPB) and the increase of active sites for H2 oxidation. However, the introduction of SDC also leaded to an increase of activation energy, which resulted in a higher anodic overpotential for Ni-SDC anodes at low temperatures compared with pure Ni. The impedance spectra of Ni-SDC anode consisted of two arcs at high temperatures. The high frequency arc increased with the amount of SDC, while the low frequency arc showed no dependency on the amount of SDC. The high frequency arc could be related to the charge transfer reaction at TPB, and the low frequency arc could correspond to the disassociative adsorption of H2 and the following diffusion processes. 75{\%} (w) Ni-25{\%} (w) SDC/LSGM/SSC exhibited the highest power density among the cells studied, and the highest power density at 1073, 973, 873 K reached 1.1, 0. 43, 0. 14 W·cm-2, respectively. The cells also showed good stability.",
author = "Wang, {Shi Zhong} and Tatsumi Ishihara",
year = "2003",
month = "9",
day = "1",
language = "English",
volume = "19",
pages = "844--848",
journal = "Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica",
issn = "1000-6818",
publisher = "Beijing University Press",
number = "9",

}

TY - JOUR

T1 - Improvement of the performance of fuel cells anodes with Sm3+ doped CeO2

AU - Wang, Shi Zhong

AU - Ishihara, Tatsumi

PY - 2003/9/1

Y1 - 2003/9/1

N2 - Various Ni-15% Sm3+(x) doped CeO2(Ni-SDC) composite anodes prepared by impregnation method were studied to unveil the role of SDC in improving the performance of Ni anode. The electrochemical properties and the power generation characteristics of the cells based on these anodes show that the performance of the cells were improved significantly by the addition of SDC into Ni due to the reduced ohmic resistance and anodic overpotential. The decrease of anodic overpotential after the introduction of SDC could be due to the extension of three-phase-boundary (TPB) and the increase of active sites for H2 oxidation. However, the introduction of SDC also leaded to an increase of activation energy, which resulted in a higher anodic overpotential for Ni-SDC anodes at low temperatures compared with pure Ni. The impedance spectra of Ni-SDC anode consisted of two arcs at high temperatures. The high frequency arc increased with the amount of SDC, while the low frequency arc showed no dependency on the amount of SDC. The high frequency arc could be related to the charge transfer reaction at TPB, and the low frequency arc could correspond to the disassociative adsorption of H2 and the following diffusion processes. 75% (w) Ni-25% (w) SDC/LSGM/SSC exhibited the highest power density among the cells studied, and the highest power density at 1073, 973, 873 K reached 1.1, 0. 43, 0. 14 W·cm-2, respectively. The cells also showed good stability.

AB - Various Ni-15% Sm3+(x) doped CeO2(Ni-SDC) composite anodes prepared by impregnation method were studied to unveil the role of SDC in improving the performance of Ni anode. The electrochemical properties and the power generation characteristics of the cells based on these anodes show that the performance of the cells were improved significantly by the addition of SDC into Ni due to the reduced ohmic resistance and anodic overpotential. The decrease of anodic overpotential after the introduction of SDC could be due to the extension of three-phase-boundary (TPB) and the increase of active sites for H2 oxidation. However, the introduction of SDC also leaded to an increase of activation energy, which resulted in a higher anodic overpotential for Ni-SDC anodes at low temperatures compared with pure Ni. The impedance spectra of Ni-SDC anode consisted of two arcs at high temperatures. The high frequency arc increased with the amount of SDC, while the low frequency arc showed no dependency on the amount of SDC. The high frequency arc could be related to the charge transfer reaction at TPB, and the low frequency arc could correspond to the disassociative adsorption of H2 and the following diffusion processes. 75% (w) Ni-25% (w) SDC/LSGM/SSC exhibited the highest power density among the cells studied, and the highest power density at 1073, 973, 873 K reached 1.1, 0. 43, 0. 14 W·cm-2, respectively. The cells also showed good stability.

UR - http://www.scopus.com/inward/record.url?scp=0141761223&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0141761223&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0141761223

VL - 19

SP - 844

EP - 848

JO - Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica

JF - Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica

SN - 1000-6818

IS - 9

ER -