Properties and electrochemical performance of Sr0.8La0.2TiO3-δ-Ce0.8Gd0.2O2-δ composite anodes for intermediate temperature solid oxide fuel cells

Manasa K. Rath; Ki Tae Lee

doi:10.1016/j.jallcom.2015.10.171

Properties and electrochemical performance of Sr_0.8La_0.2TiO_3-δ-Ce_0.8Gd_0.2O_2-δ composite anodes for intermediate temperature solid oxide fuel cells

Manasa K. Rath
, Ki Tae Lee^*

^*Corresponding author for this work

Electronic Materials Engineering

Jeonbuk National University

Research output: Contribution to journal › Journal article › peer-review

9 Scopus citations

Abstract

A series of Sr_0.8La_0.2TiO_3-δ (SLT)-Ce_0.8Gd_0.2O_2-δ (GDC) composite anodes with various volume ratios of SLT and GDC has been synthesized using a sucrose modified combustion technique. The percolation thresholds of Sr_0.8La_0.2TiO_3-δ and Ce_0.8Gd_0.2O_2-δ in the composite calculated based on the Kusy's percolation theory were 75.6 vol.% and 36.1 vol.%, respectively. While the rate of carbon deposition increased with an increase in the Ce_0.8Gd_0.2O_2-δ content, the total electrical conductivity decreased in humidified H₂ as well as in CH₄. Based on the electrochemical performance measured using AC-impedance spectroscopy, the optimal anode composition was 65 vol.% Sr_0.8La_0.2TiO_3-δ-35 vol.% Ce_0.8Gd_0.2O_2-δ. This composite has polarization resistances of 2.80 ω cm² and 4.60 ω cm² in H₂ and CH₄, respectively, measured at 800 °C. Diffusion or concentration polarization was the rate determining steps for the fuel oxidation process in the Sr_0.8La_0.2TiO_3-δ-Ce_0.8Gd_0.2O_2-δ composite anode.

Original language	English
Pages (from-to)	537-545
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	657
DOIs	https://doi.org/10.1016/j.jallcom.2015.10.171
State	Published - 2016.02.5

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Composite anode
Percolation
Polarization resistance
Solid oxide fuel cell

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Engineering - Mechanical

Access to Document

10.1016/j.jallcom.2015.10.171

Cite this

@article{8aac9e97e898407f909bbf5a7b239c95,

title = "Properties and electrochemical performance of Sr0.8La0.2TiO3-δ-Ce0.8Gd0.2O2-δ composite anodes for intermediate temperature solid oxide fuel cells",

abstract = "A series of Sr0.8La0.2TiO3-δ (SLT)-Ce0.8Gd0.2O2-δ (GDC) composite anodes with various volume ratios of SLT and GDC has been synthesized using a sucrose modified combustion technique. The percolation thresholds of Sr0.8La0.2TiO3-δ and Ce0.8Gd0.2O2-δ in the composite calculated based on the Kusy's percolation theory were 75.6 vol.\% and 36.1 vol.\%, respectively. While the rate of carbon deposition increased with an increase in the Ce0.8Gd0.2O2-δ content, the total electrical conductivity decreased in humidified H2 as well as in CH4. Based on the electrochemical performance measured using AC-impedance spectroscopy, the optimal anode composition was 65 vol.\% Sr0.8La0.2TiO3-δ-35 vol.\% Ce0.8Gd0.2O2-δ. This composite has polarization resistances of 2.80 ω cm2 and 4.60 ω cm2 in H2 and CH4, respectively, measured at 800 °C. Diffusion or concentration polarization was the rate determining steps for the fuel oxidation process in the Sr0.8La0.2TiO3-δ-Ce0.8Gd0.2O2-δ composite anode.",

keywords = "Composite anode, Percolation, Polarization resistance, Solid oxide fuel cell",

author = "Rath, \{Manasa K.\} and Lee, \{Ki Tae\}",

year = "2016",

month = feb,

day = "5",

doi = "10.1016/j.jallcom.2015.10.171",

language = "English",

volume = "657",

pages = "537--545",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

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TY - JOUR

T1 - Properties and electrochemical performance of Sr0.8La0.2TiO3-δ-Ce0.8Gd0.2O2-δ composite anodes for intermediate temperature solid oxide fuel cells

AU - Rath, Manasa K.

AU - Lee, Ki Tae

PY - 2016/2/5

Y1 - 2016/2/5

N2 - A series of Sr0.8La0.2TiO3-δ (SLT)-Ce0.8Gd0.2O2-δ (GDC) composite anodes with various volume ratios of SLT and GDC has been synthesized using a sucrose modified combustion technique. The percolation thresholds of Sr0.8La0.2TiO3-δ and Ce0.8Gd0.2O2-δ in the composite calculated based on the Kusy's percolation theory were 75.6 vol.% and 36.1 vol.%, respectively. While the rate of carbon deposition increased with an increase in the Ce0.8Gd0.2O2-δ content, the total electrical conductivity decreased in humidified H2 as well as in CH4. Based on the electrochemical performance measured using AC-impedance spectroscopy, the optimal anode composition was 65 vol.% Sr0.8La0.2TiO3-δ-35 vol.% Ce0.8Gd0.2O2-δ. This composite has polarization resistances of 2.80 ω cm2 and 4.60 ω cm2 in H2 and CH4, respectively, measured at 800 °C. Diffusion or concentration polarization was the rate determining steps for the fuel oxidation process in the Sr0.8La0.2TiO3-δ-Ce0.8Gd0.2O2-δ composite anode.

AB - A series of Sr0.8La0.2TiO3-δ (SLT)-Ce0.8Gd0.2O2-δ (GDC) composite anodes with various volume ratios of SLT and GDC has been synthesized using a sucrose modified combustion technique. The percolation thresholds of Sr0.8La0.2TiO3-δ and Ce0.8Gd0.2O2-δ in the composite calculated based on the Kusy's percolation theory were 75.6 vol.% and 36.1 vol.%, respectively. While the rate of carbon deposition increased with an increase in the Ce0.8Gd0.2O2-δ content, the total electrical conductivity decreased in humidified H2 as well as in CH4. Based on the electrochemical performance measured using AC-impedance spectroscopy, the optimal anode composition was 65 vol.% Sr0.8La0.2TiO3-δ-35 vol.% Ce0.8Gd0.2O2-δ. This composite has polarization resistances of 2.80 ω cm2 and 4.60 ω cm2 in H2 and CH4, respectively, measured at 800 °C. Diffusion or concentration polarization was the rate determining steps for the fuel oxidation process in the Sr0.8La0.2TiO3-δ-Ce0.8Gd0.2O2-δ composite anode.

KW - Composite anode

KW - Percolation

KW - Polarization resistance

KW - Solid oxide fuel cell

UR - https://www.scopus.com/pages/publications/84946134451

U2 - 10.1016/j.jallcom.2015.10.171

DO - 10.1016/j.jallcom.2015.10.171

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AN - SCOPUS:84946134451

SN - 0925-8388

VL - 657

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -