Effect of Ru/CGO versus Ni/CGO Co- Infiltration on the Performance and Stability of STN-Based SOFCs

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Electrolyte supported cells (ESC), with Sc2O3-stabilized ZrO2 (ScSZ) electrolytes, Gd-doped ceria (CGO) or M/CGO (M = Ni, Ru) infiltrated Sr0.94Ti0.9Nb0.1O3 (STN94) anodes and LSM/YSZ cathodes, were evaluated for their initial performance and long-term stability. Power density for the Ru/CGO infiltrated cell reached ∼0.7 W cm–2 at 850 °C, 4% H2O/H2, whereas the Ni/CGO infiltrated cell reached ∼0.3 W cm–2, with the current morphologies and loadings. Operation at 0.125 A cm–2, 850 °C, feeding 50% H2O/H2 to the anode and air to the cathode, for a period >300 h, showed superior stability for the Ru/CGO infiltrated cell, with ∼0.04 mV h–1 degradation rate, when compared to the Ni/CGO infiltrated cell (∼0.5 mV h–1). For the Ni/CGO case, the observed degradation has been tentatively linked to initial changes in the electrochemical active area and longterm detrimental interactions between components.
Original languageEnglish
JournalFuel Cells
Volume14
Issue number6
Pages (from-to)1062-1065
ISSN1615-6846
DOIs
Publication statusPublished - 2014

Keywords

  • Electrocatalysts
  • Infiltration
  • Performance
  • Solid Oxide Fuel Cells
  • Stability

Cite this

@article{bd4ba9dd4d95417faab613f7ebe56991,
title = "Effect of Ru/CGO versus Ni/CGO Co- Infiltration on the Performance and Stability of STN-Based SOFCs",
abstract = "Electrolyte supported cells (ESC), with Sc2O3-stabilized ZrO2 (ScSZ) electrolytes, Gd-doped ceria (CGO) or M/CGO (M = Ni, Ru) infiltrated Sr0.94Ti0.9Nb0.1O3 (STN94) anodes and LSM/YSZ cathodes, were evaluated for their initial performance and long-term stability. Power density for the Ru/CGO infiltrated cell reached ∼0.7 W cm–2 at 850 °C, 4{\%} H2O/H2, whereas the Ni/CGO infiltrated cell reached ∼0.3 W cm–2, with the current morphologies and loadings. Operation at 0.125 A cm–2, 850 °C, feeding 50{\%} H2O/H2 to the anode and air to the cathode, for a period >300 h, showed superior stability for the Ru/CGO infiltrated cell, with ∼0.04 mV h–1 degradation rate, when compared to the Ni/CGO infiltrated cell (∼0.5 mV h–1). For the Ni/CGO case, the observed degradation has been tentatively linked to initial changes in the electrochemical active area and longterm detrimental interactions between components.",
keywords = "Electrocatalysts, Infiltration, Performance, Solid Oxide Fuel Cells, Stability",
author = "Tania Ramos and Sune Veltz{\'e} and Sudireddy, {Bhaskar Reddy} and J{\o}rgensen, {Peter Stanley} and Kuhn, {Luise Theil} and Peter Holtappels",
year = "2014",
doi = "10.1002/fuce.201400013",
language = "English",
volume = "14",
pages = "1062--1065",
journal = "Fuel Cells",
issn = "1615-6846",
publisher = "Wiley - V C H Verlag GmbH & Co. KGaA",
number = "6",

}

Effect of Ru/CGO versus Ni/CGO Co- Infiltration on the Performance and Stability of STN-Based SOFCs. / Ramos, Tania; Veltzé, Sune; Sudireddy, Bhaskar Reddy; Jørgensen, Peter Stanley; Kuhn, Luise Theil; Holtappels, Peter.

In: Fuel Cells, Vol. 14, No. 6, 2014, p. 1062-1065.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effect of Ru/CGO versus Ni/CGO Co- Infiltration on the Performance and Stability of STN-Based SOFCs

AU - Ramos, Tania

AU - Veltzé, Sune

AU - Sudireddy, Bhaskar Reddy

AU - Jørgensen, Peter Stanley

AU - Kuhn, Luise Theil

AU - Holtappels, Peter

PY - 2014

Y1 - 2014

N2 - Electrolyte supported cells (ESC), with Sc2O3-stabilized ZrO2 (ScSZ) electrolytes, Gd-doped ceria (CGO) or M/CGO (M = Ni, Ru) infiltrated Sr0.94Ti0.9Nb0.1O3 (STN94) anodes and LSM/YSZ cathodes, were evaluated for their initial performance and long-term stability. Power density for the Ru/CGO infiltrated cell reached ∼0.7 W cm–2 at 850 °C, 4% H2O/H2, whereas the Ni/CGO infiltrated cell reached ∼0.3 W cm–2, with the current morphologies and loadings. Operation at 0.125 A cm–2, 850 °C, feeding 50% H2O/H2 to the anode and air to the cathode, for a period >300 h, showed superior stability for the Ru/CGO infiltrated cell, with ∼0.04 mV h–1 degradation rate, when compared to the Ni/CGO infiltrated cell (∼0.5 mV h–1). For the Ni/CGO case, the observed degradation has been tentatively linked to initial changes in the electrochemical active area and longterm detrimental interactions between components.

AB - Electrolyte supported cells (ESC), with Sc2O3-stabilized ZrO2 (ScSZ) electrolytes, Gd-doped ceria (CGO) or M/CGO (M = Ni, Ru) infiltrated Sr0.94Ti0.9Nb0.1O3 (STN94) anodes and LSM/YSZ cathodes, were evaluated for their initial performance and long-term stability. Power density for the Ru/CGO infiltrated cell reached ∼0.7 W cm–2 at 850 °C, 4% H2O/H2, whereas the Ni/CGO infiltrated cell reached ∼0.3 W cm–2, with the current morphologies and loadings. Operation at 0.125 A cm–2, 850 °C, feeding 50% H2O/H2 to the anode and air to the cathode, for a period >300 h, showed superior stability for the Ru/CGO infiltrated cell, with ∼0.04 mV h–1 degradation rate, when compared to the Ni/CGO infiltrated cell (∼0.5 mV h–1). For the Ni/CGO case, the observed degradation has been tentatively linked to initial changes in the electrochemical active area and longterm detrimental interactions between components.

KW - Electrocatalysts

KW - Infiltration

KW - Performance

KW - Solid Oxide Fuel Cells

KW - Stability

U2 - 10.1002/fuce.201400013

DO - 10.1002/fuce.201400013

M3 - Journal article

VL - 14

SP - 1062

EP - 1065

JO - Fuel Cells

JF - Fuel Cells

SN - 1615-6846

IS - 6

ER -