Impact of Reduction Parameters on the Initial Performance and Stability of Ni/(Sc)YSZ Cermet Anodes for SOFCs

Publication: Research - peer-reviewConference article – Annual report year: 2012

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Impact of Reduction Parameters on the Initial Performance and Stability of Ni/(Sc)YSZ Cermet Anodes for SOFCs. / Ebbehøj, Søren Lyng; Ramos, Tania; Mogensen, Mogens Bjerg.

In: E C S Transactions, Vol. 45, No. 1, 2012, p. 363-375.

Publication: Research - peer-reviewConference article – Annual report year: 2012

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Ebbehøj, Søren Lyng; Ramos, Tania; Mogensen, Mogens Bjerg / Impact of Reduction Parameters on the Initial Performance and Stability of Ni/(Sc)YSZ Cermet Anodes for SOFCs.

In: E C S Transactions, Vol. 45, No. 1, 2012, p. 363-375.

Publication: Research - peer-reviewConference article – Annual report year: 2012

Bibtex

@article{a073bf31cba749f2af74e8494ab4ff3e,
title = "Impact of Reduction Parameters on the Initial Performance and Stability of Ni/(Sc)YSZ Cermet Anodes for SOFCs",
publisher = "Electrochemical Society, Inc.",
author = "Ebbehøj, {Søren Lyng} and Tania Ramos and Mogensen, {Mogens Bjerg}",
year = "2012",
doi = "10.1149/1.3701328",
volume = "45",
number = "1",
pages = "363--375",
journal = "E C S Transactions",
issn = "1938-5862",

}

RIS

TY - CONF

T1 - Impact of Reduction Parameters on the Initial Performance and Stability of Ni/(Sc)YSZ Cermet Anodes for SOFCs

A1 - Ebbehøj,Søren Lyng

A1 - Ramos,Tania

A1 - Mogensen,Mogens Bjerg

AU - Ebbehøj,Søren Lyng

AU - Ramos,Tania

AU - Mogensen,Mogens Bjerg

PB - Electrochemical Society, Inc.

PY - 2012

Y1 - 2012

N2 - In-situ reduction of Ni cermet anodes produces the porosity and influences the microstructure, performance and stability of the anodes. The impact on initial performance, stability and microstructure of two different reduction procedures currently in use at DTU Energy Conversion with reduction temperatures of 850 °C and 1000 °C was evaluated for tape-cast, thin electrolyte, Nickel/8 mol% Yttria-Stabilized Zirconia (Ni/8YSZ) or (Ni/10Sc1YSZ) symmetric cells. High temperature activation produced the lower Ohmic and polarization resistances related to Triple Phase Boundary (TPB) charge transfer processes for Ni/10Sc1YSZ cells. The Ni/8YSZ cells behaved oppositely with respect to reduction temperature. A hypothesis is proposed relating performance to variations in Ni microstructure, Ni/ceramic<br/>contacting and extent of TPB resulting from differences in reduction parameters. Further, the performance stability under high steam conditions was evaluated, and very stable performances and<br/>microstructures of the anode layers were observed.

AB - In-situ reduction of Ni cermet anodes produces the porosity and influences the microstructure, performance and stability of the anodes. The impact on initial performance, stability and microstructure of two different reduction procedures currently in use at DTU Energy Conversion with reduction temperatures of 850 °C and 1000 °C was evaluated for tape-cast, thin electrolyte, Nickel/8 mol% Yttria-Stabilized Zirconia (Ni/8YSZ) or (Ni/10Sc1YSZ) symmetric cells. High temperature activation produced the lower Ohmic and polarization resistances related to Triple Phase Boundary (TPB) charge transfer processes for Ni/10Sc1YSZ cells. The Ni/8YSZ cells behaved oppositely with respect to reduction temperature. A hypothesis is proposed relating performance to variations in Ni microstructure, Ni/ceramic<br/>contacting and extent of TPB resulting from differences in reduction parameters. Further, the performance stability under high steam conditions was evaluated, and very stable performances and<br/>microstructures of the anode layers were observed.

U2 - 10.1149/1.3701328

DO - 10.1149/1.3701328

JO - E C S Transactions

JF - E C S Transactions

SN - 1938-5862

IS - 1

VL - 45

SP - 363

EP - 375

ER -