Carbon and Redox Tolerant Infiltrated Oxide Fuel-Electrodes for Solid Oxide Cells

Theis Løye Skafte; Bhaskar Reddy Sudireddy; P. Blennow; Christopher R. Graves

doi:10.1149/07207.0201ecst

Carbon and Redox Tolerant Infiltrated Oxide Fuel-Electrodes for Solid Oxide Cells

Theis Løye Skafte
, Bhaskar Reddy Sudireddy
, P. Blennow
, Christopher R. Graves

Department of Energy Conversion and Storage

Haldor Topsoe AS

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

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Abstract

To solve issues of coking and redox instability related to the presence of nickel in typical fuel electrodes in solid oxide cells,Gd-doped CeO₂ (CGO) electrodes were studied using symmetriccells. These electrodes showed high electro-catalytic activity, butlow electronic conductivity. When infiltrated with Sr_0.99Fe_0.75Mo_0.25O_3-δ (SFM), the electronic conductivity wasenhanced. However, polarization resistance of the cells increased,suggesting that the infiltrated material is less electro-catalyticallyactive and was partly blocking the CGO surface reaction sites. Theactivity could be regained by infiltrating nano-sized CGO orNiCGO on top of SFM, while still sustaining the high electronicconductivity. Ohmic resistance of the electrodes was thuspractically eliminated and performance comparable to, or betterthan, state-of-the-art fuel electrodes was achieved. The Nicontaining cells were damaged by carbon deposition in a CO/CO₂-atmosphere, while none of the non-nickel cells catalyzed carbon.Stability towards redox cycles was also proven.

Original language	English
Journal	E C S Transactions
Volume	72
Issue number	7
Pages (from-to)	201-214
Number of pages	14
ISSN	1938-5862
DOIs	https://doi.org/10.1149/07207.0201ecst
Publication status	Published - 2016
Event	The 229th ECS Meeting - San Diego, United States Duration: 29 May 2016 → 2 Jun 2016 Conference number: 229 http://www.electrochem.org/229

Conference

Conference	The 229th ECS Meeting
Number	229
Country/Territory	United States
City	San Diego
Period	29/05/2016 → 02/06/2016
Internet address	http://www.electrochem.org/229

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Skafte ECS 229 v1Accepted author manuscript, 5.57 MB

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@inproceedings{e5a6b5c4cfec4e6b82fdc6d10e41fa51,

title = "Carbon and Redox Tolerant Infiltrated Oxide Fuel-Electrodes for Solid Oxide Cells",

abstract = "To solve issues of coking and redox instability related to the presence of nickel in typical fuel electrodes in solid oxide cells,Gd-doped CeO2 (CGO) electrodes were studied using symmetriccells. These electrodes showed high electro-catalytic activity, butlow electronic conductivity. When infiltrated with Sr0.99Fe0.75Mo0.25O3-δ (SFM), the electronic conductivity wasenhanced. However, polarization resistance of the cells increased,suggesting that the infiltrated material is less electro-catalyticallyactive and was partly blocking the CGO surface reaction sites. Theactivity could be regained by infiltrating nano-sized CGO orNiCGO on top of SFM, while still sustaining the high electronicconductivity. Ohmic resistance of the electrodes was thuspractically eliminated and performance comparable to, or betterthan, state-of-the-art fuel electrodes was achieved. The Nicontaining cells were damaged by carbon deposition in a CO/CO2-atmosphere, while none of the non-nickel cells catalyzed carbon.Stability towards redox cycles was also proven. ",

author = "Skafte, \{Theis L{\o}ye\} and Sudireddy, \{Bhaskar Reddy\} and P. Blennow and Graves, \{Christopher R.\}",

year = "2016",

doi = "10.1149/07207.0201ecst",

language = "English",

volume = "72",

pages = "201--214",

journal = "E C S Transactions",

issn = "1938-5862",

publisher = "The Electrochemical Society",

number = "7",

note = "The 229th ECS Meeting ; Conference date: 29-05-2016 Through 02-06-2016",

url = "http://www.electrochem.org/229",

}

TY - GEN

T1 - Carbon and Redox Tolerant Infiltrated Oxide Fuel-Electrodes for Solid Oxide Cells

AU - Skafte, Theis Løye

AU - Sudireddy, Bhaskar Reddy

AU - Blennow, P.

AU - Graves, Christopher R.

N1 - Conference code: 229

PY - 2016

Y1 - 2016

N2 - To solve issues of coking and redox instability related to the presence of nickel in typical fuel electrodes in solid oxide cells,Gd-doped CeO2 (CGO) electrodes were studied using symmetriccells. These electrodes showed high electro-catalytic activity, butlow electronic conductivity. When infiltrated with Sr0.99Fe0.75Mo0.25O3-δ (SFM), the electronic conductivity wasenhanced. However, polarization resistance of the cells increased,suggesting that the infiltrated material is less electro-catalyticallyactive and was partly blocking the CGO surface reaction sites. Theactivity could be regained by infiltrating nano-sized CGO orNiCGO on top of SFM, while still sustaining the high electronicconductivity. Ohmic resistance of the electrodes was thuspractically eliminated and performance comparable to, or betterthan, state-of-the-art fuel electrodes was achieved. The Nicontaining cells were damaged by carbon deposition in a CO/CO2-atmosphere, while none of the non-nickel cells catalyzed carbon.Stability towards redox cycles was also proven.

AB - To solve issues of coking and redox instability related to the presence of nickel in typical fuel electrodes in solid oxide cells,Gd-doped CeO2 (CGO) electrodes were studied using symmetriccells. These electrodes showed high electro-catalytic activity, butlow electronic conductivity. When infiltrated with Sr0.99Fe0.75Mo0.25O3-δ (SFM), the electronic conductivity wasenhanced. However, polarization resistance of the cells increased,suggesting that the infiltrated material is less electro-catalyticallyactive and was partly blocking the CGO surface reaction sites. Theactivity could be regained by infiltrating nano-sized CGO orNiCGO on top of SFM, while still sustaining the high electronicconductivity. Ohmic resistance of the electrodes was thuspractically eliminated and performance comparable to, or betterthan, state-of-the-art fuel electrodes was achieved. The Nicontaining cells were damaged by carbon deposition in a CO/CO2-atmosphere, while none of the non-nickel cells catalyzed carbon.Stability towards redox cycles was also proven.

U2 - 10.1149/07207.0201ecst

DO - 10.1149/07207.0201ecst

M3 - Conference article

SN - 1938-5862

VL - 72

SP - 201

EP - 214

JO - E C S Transactions

JF - E C S Transactions

IS - 7

T2 - The 229th ECS Meeting

Y2 - 29 May 2016 through 2 June 2016

ER -

Carbon and Redox Tolerant Infiltrated Oxide Fuel-Electrodes for Solid Oxide Cells

Abstract

Conference

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