Percolation effect on electrical, mechanical, and electrochemical properties of Sr0.8La0.2TiO3-Ce0.9Gd0.1O1.95 composite anodes for solid oxide fuel cells

Ji Hoon Koo; Ki Tae Lee

doi:10.1016/j.jallcom.2016.01.128

Percolation effect on electrical, mechanical, and electrochemical properties of Sr_0.8La_0.2TiO₃-Ce_0.9Gd_0.1O_1.95 composite anodes for solid oxide fuel cells

Ji Hoon Koo
, Ki Tae Lee^*

^*Corresponding author for this work

Electronic Materials Engineering

Jeonbuk National University

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

Abstract

Both the electrical conductivity and mechanical strength of a Sr_0.8La_0.2TiO₃-Ce_0.9Gd_0.1O_1.95 (SLT-GDC) composite decreased non-linearly as the GDC content increased. In the GDC percolation region, the electrical conductivity and the mechanical strength decreased significantly. Because the carbon deposition rate increased with increasing GDC content, the redox stability decreased. The area specific resistance (ASR) of the SLT-GDC composite anode at 800°C in H₂ decreased up to 15 vol.% GDC (SLT-GDC15) and then increased at the SLT-GDC20 and the SLT-GDC33 compositions, due to the high electro-catalytic activity and low electrical conductivity of GDC. Consequently, the SLT-GDC15 composition within the mixed region below SLT and GDC percolation limit exhibited the best electrochemical performance due to the optimized electronic and ionic conduction network.

Original language	English
Pages (from-to)	69-75
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	667
DOIs	https://doi.org/10.1016/j.jallcom.2016.01.128
State	Published - 2016.05.15

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Composite
Electrochemical property
Oxide anode
Percolation
Solid oxide fuel cell

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Engineering - Mechanical

Access to Document

10.1016/j.jallcom.2016.01.128

Cite this

@article{70b0b94d50ba4b238cb0c65d32997f64,

title = "Percolation effect on electrical, mechanical, and electrochemical properties of Sr0.8La0.2TiO3-Ce0.9Gd0.1O1.95 composite anodes for solid oxide fuel cells",

abstract = "Both the electrical conductivity and mechanical strength of a Sr0.8La0.2TiO3-Ce0.9Gd0.1O1.95 (SLT-GDC) composite decreased non-linearly as the GDC content increased. In the GDC percolation region, the electrical conductivity and the mechanical strength decreased significantly. Because the carbon deposition rate increased with increasing GDC content, the redox stability decreased. The area specific resistance (ASR) of the SLT-GDC composite anode at 800°C in H2 decreased up to 15 vol.\% GDC (SLT-GDC15) and then increased at the SLT-GDC20 and the SLT-GDC33 compositions, due to the high electro-catalytic activity and low electrical conductivity of GDC. Consequently, the SLT-GDC15 composition within the mixed region below SLT and GDC percolation limit exhibited the best electrochemical performance due to the optimized electronic and ionic conduction network.",

keywords = "Composite, Electrochemical property, Oxide anode, Percolation, Solid oxide fuel cell",

author = "Koo, \{Ji Hoon\} and Lee, \{Ki Tae\}",

year = "2016",

month = may,

day = "15",

doi = "10.1016/j.jallcom.2016.01.128",

language = "English",

volume = "667",

pages = "69--75",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

}

TY - JOUR

T1 - Percolation effect on electrical, mechanical, and electrochemical properties of Sr0.8La0.2TiO3-Ce0.9Gd0.1O1.95 composite anodes for solid oxide fuel cells

AU - Koo, Ji Hoon

AU - Lee, Ki Tae

PY - 2016/5/15

Y1 - 2016/5/15

N2 - Both the electrical conductivity and mechanical strength of a Sr0.8La0.2TiO3-Ce0.9Gd0.1O1.95 (SLT-GDC) composite decreased non-linearly as the GDC content increased. In the GDC percolation region, the electrical conductivity and the mechanical strength decreased significantly. Because the carbon deposition rate increased with increasing GDC content, the redox stability decreased. The area specific resistance (ASR) of the SLT-GDC composite anode at 800°C in H2 decreased up to 15 vol.% GDC (SLT-GDC15) and then increased at the SLT-GDC20 and the SLT-GDC33 compositions, due to the high electro-catalytic activity and low electrical conductivity of GDC. Consequently, the SLT-GDC15 composition within the mixed region below SLT and GDC percolation limit exhibited the best electrochemical performance due to the optimized electronic and ionic conduction network.

AB - Both the electrical conductivity and mechanical strength of a Sr0.8La0.2TiO3-Ce0.9Gd0.1O1.95 (SLT-GDC) composite decreased non-linearly as the GDC content increased. In the GDC percolation region, the electrical conductivity and the mechanical strength decreased significantly. Because the carbon deposition rate increased with increasing GDC content, the redox stability decreased. The area specific resistance (ASR) of the SLT-GDC composite anode at 800°C in H2 decreased up to 15 vol.% GDC (SLT-GDC15) and then increased at the SLT-GDC20 and the SLT-GDC33 compositions, due to the high electro-catalytic activity and low electrical conductivity of GDC. Consequently, the SLT-GDC15 composition within the mixed region below SLT and GDC percolation limit exhibited the best electrochemical performance due to the optimized electronic and ionic conduction network.

KW - Composite

KW - Electrochemical property

KW - Oxide anode

KW - Percolation

KW - Solid oxide fuel cell

UR - https://www.scopus.com/pages/publications/84957828044

U2 - 10.1016/j.jallcom.2016.01.128

DO - 10.1016/j.jallcom.2016.01.128

M3 - Journal article

AN - SCOPUS:84957828044

SN - 0925-8388

VL - 667

SP - 69

EP - 75

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -