Three-phase-boundary dynamics at the Ni/ScYSZ interface

Michael Stenbæk Schmidt; Karin Vels Hansen; Kion Norrman; Mogens Mogensen

doi:10.1016/j.ssi.2009.01.017

Three-phase-boundary dynamics at the Ni/ScYSZ interface

Michael Stenbæk Schmidt^*
, Karin Vels Hansen
, Kion Norrman
, Mogens Mogensen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Chronoamperometry using a three-electrode cell configuration was undertaken with a nickel point-electrode acting as the working electrode on a polished ScYSZ electrolyte in a hydrogen atmosphere at 750-850 °C. High anodic overpotentials resulted in the occurrence of distinct sawtooth oscillation patterns in the measured current signal. The current oscillations indicated that a dynamic electrode process was taking place. Decreasing the water content in the measurement atmosphere as well as lowering the applied anodic overpotential had the effect of lowering the frequency and the amplitude of the current oscillations. A mechanism accounting for the observed phenomena and possible implications for solid oxide fuel cell operation are presented.

Original language	English
Pages (from-to)	431-438
Number of pages	8
Journal	Solid State Ionics
Volume	180
Issue number	4-5
DOIs	https://doi.org/10.1016/j.ssi.2009.01.017
State	Published - 27 Apr 2009
Externally published	Yes

Bibliographical note

Funding Information:
This work was carried out as part of the project “Efficient Conversion of Renewable Energy using Solid Oxide Cells” contract number 2058-03-0014, which is financially supported by The Danish Research Councils and the Danish Ministry of Science Technology and Innovation.

Keywords

Anode dynamics
Ni
Polarisation
ScYSZ
Solid oxide fuel cell
ToF-SIMS

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

UN SDGs

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

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10.1016/j.ssi.2009.01.017

Cite this

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title = "Three-phase-boundary dynamics at the Ni/ScYSZ interface",

abstract = "Chronoamperometry using a three-electrode cell configuration was undertaken with a nickel point-electrode acting as the working electrode on a polished ScYSZ electrolyte in a hydrogen atmosphere at 750-850 °C. High anodic overpotentials resulted in the occurrence of distinct sawtooth oscillation patterns in the measured current signal. The current oscillations indicated that a dynamic electrode process was taking place. Decreasing the water content in the measurement atmosphere as well as lowering the applied anodic overpotential had the effect of lowering the frequency and the amplitude of the current oscillations. A mechanism accounting for the observed phenomena and possible implications for solid oxide fuel cell operation are presented.",

keywords = "Anode dynamics, Ni, Polarisation, ScYSZ, Solid oxide fuel cell, ToF-SIMS",

author = "Schmidt, \{Michael Stenb{\ae}k\} and \{Vels Hansen\}, Karin and Kion Norrman and Mogens Mogensen",

note = "Funding Information: This work was carried out as part of the project “Efficient Conversion of Renewable Energy using Solid Oxide Cells” contract number 2058-03-0014, which is financially supported by The Danish Research Councils and the Danish Ministry of Science Technology and Innovation.",

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doi = "10.1016/j.ssi.2009.01.017",

language = "English",

volume = "180",

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journal = "Solid State Ionics",

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TY - JOUR

T1 - Three-phase-boundary dynamics at the Ni/ScYSZ interface

AU - Schmidt, Michael Stenbæk

AU - Vels Hansen, Karin

AU - Norrman, Kion

AU - Mogensen, Mogens

N1 - Funding Information: This work was carried out as part of the project “Efficient Conversion of Renewable Energy using Solid Oxide Cells” contract number 2058-03-0014, which is financially supported by The Danish Research Councils and the Danish Ministry of Science Technology and Innovation.

PY - 2009/4/27

Y1 - 2009/4/27

N2 - Chronoamperometry using a three-electrode cell configuration was undertaken with a nickel point-electrode acting as the working electrode on a polished ScYSZ electrolyte in a hydrogen atmosphere at 750-850 °C. High anodic overpotentials resulted in the occurrence of distinct sawtooth oscillation patterns in the measured current signal. The current oscillations indicated that a dynamic electrode process was taking place. Decreasing the water content in the measurement atmosphere as well as lowering the applied anodic overpotential had the effect of lowering the frequency and the amplitude of the current oscillations. A mechanism accounting for the observed phenomena and possible implications for solid oxide fuel cell operation are presented.

AB - Chronoamperometry using a three-electrode cell configuration was undertaken with a nickel point-electrode acting as the working electrode on a polished ScYSZ electrolyte in a hydrogen atmosphere at 750-850 °C. High anodic overpotentials resulted in the occurrence of distinct sawtooth oscillation patterns in the measured current signal. The current oscillations indicated that a dynamic electrode process was taking place. Decreasing the water content in the measurement atmosphere as well as lowering the applied anodic overpotential had the effect of lowering the frequency and the amplitude of the current oscillations. A mechanism accounting for the observed phenomena and possible implications for solid oxide fuel cell operation are presented.

KW - Anode dynamics

KW - Ni

KW - Polarisation

KW - ScYSZ

KW - Solid oxide fuel cell

KW - ToF-SIMS

UR - https://www.scopus.com/pages/publications/63449117088

U2 - 10.1016/j.ssi.2009.01.017

DO - 10.1016/j.ssi.2009.01.017

M3 - Article

AN - SCOPUS:63449117088

SN - 0167-2738

VL - 180

SP - 431

EP - 438

JO - Solid State Ionics

JF - Solid State Ionics

IS - 4-5

ER -

Three-phase-boundary dynamics at the Ni/ScYSZ interface

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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