Nickel-ceria infiltrated Nb-doped SrTiO3 for low temperature SOFC anodes and analysis on gas diffusion impedance

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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@article{c91138d8ded74de6b8534e9592a75809,
title = "Nickel-ceria infiltrated Nb-doped SrTiO3 for low temperature SOFC anodes and analysis on gas diffusion impedance",
publisher = "Pergamon",
author = "{Abdul Jabbar}, {Mohammed Hussain} and Høgh, {Jens Valdemar Thorvald} and Torben Jacobsen and Nikolaos Bonanos",
year = "2012",
doi = "10.1016/j.ijhydene.2011.11.087",
volume = "37",
pages = "4309--4318",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",

}

RIS

TY - JOUR

T1 - Nickel-ceria infiltrated Nb-doped SrTiO3 for low temperature SOFC anodes and analysis on gas diffusion impedance

A1 - Abdul Jabbar,Mohammed Hussain

A1 - Høgh,Jens Valdemar Thorvald

A1 - Jacobsen,Torben

A1 - Bonanos,Nikolaos

AU - Abdul Jabbar,Mohammed Hussain

AU - Høgh,Jens Valdemar Thorvald

AU - Jacobsen,Torben

AU - Bonanos,Nikolaos

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - This report concentrates on high performance anodes appropriate for SOFCs operating at low temperatures (400–600 °C). Symmetrical cells were made by screen printing of Nb-doped SrTiO3 (STN) on both sides of a dense ScYSZ electrolyte. Backbones I (36% porosity) and II (47% porosity) were obtained by sintering STN in air and reducing atmosphere, respectively. The porous microstructures were then infiltrated with Ni and Gd-doped CeO2 (CGO) precursors to incorporate the electrocatalytically active sites. The electrochemical performance of the anode was improved with the increment of Ni-CGO loadings. The gas diffusion impedance was investigated with He and N2 in H2/H2O gas mixtures and by varying the H2O content at 655 °C. This study indicated that the gas diffusion in these electrodes are influenced by Knudsen and bulk diffusion.

AB - This report concentrates on high performance anodes appropriate for SOFCs operating at low temperatures (400–600 °C). Symmetrical cells were made by screen printing of Nb-doped SrTiO3 (STN) on both sides of a dense ScYSZ electrolyte. Backbones I (36% porosity) and II (47% porosity) were obtained by sintering STN in air and reducing atmosphere, respectively. The porous microstructures were then infiltrated with Ni and Gd-doped CeO2 (CGO) precursors to incorporate the electrocatalytically active sites. The electrochemical performance of the anode was improved with the increment of Ni-CGO loadings. The gas diffusion impedance was investigated with He and N2 in H2/H2O gas mixtures and by varying the H2O content at 655 °C. This study indicated that the gas diffusion in these electrodes are influenced by Knudsen and bulk diffusion.

KW - STN microstructure

KW - Electrode process

KW - Gas diffusion impedance

KW - Infiltration optimization

U2 - 10.1016/j.ijhydene.2011.11.087

DO - 10.1016/j.ijhydene.2011.11.087

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

VL - 37

SP - 4309

EP - 4318

ER -