H2-H2O-Ni-YSZ electrode performance effect of segregation to the interface

Karin Vels Hansen; Kion Norrman; Mogens Mogensen

doi:10.1149/1.1779630

H₂-H₂O-Ni-YSZ electrode performance effect of segregation to the interface

Karin Vels Hansen^*
, Kion Norrman
, Mogens Mogensen

^*Corresponding author for this work

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

97 Scopus citations

Abstract

The electrochemical properties of the interface between Ni and yttria-stabilized zirconia (YSZ) in the H₂-H₂O-Ni-YSZ electrode have been investigated in order to obtain knowledge on the effect of segregation of impurities to the electrode-electrolyte interface on performance. Even for a relatively pure nickel electrode, a film of impurities was found at the contact between Ni and YSZ and on the surface of YSZ. Impurity ridges were also found at the three-phase boundary. Impurities in these locations all have the potential of impeding processes and reactions at the electrode-electrolyte interface. The pure electrodes showed a lower resistance compared to most electrodes discussed in the literature.

Original language	English
Pages (from-to)	A1436-A1444
Journal	Journal of the Electrochemical Society
Volume	151
Issue number	9
DOIs	https://doi.org/10.1149/1.1779630
State	Published - 2004
Externally published	Yes

UN SDGs

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

SDG 7 Affordable and Clean Energy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

Access to Document

10.1149/1.1779630

Cite this

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abstract = "The electrochemical properties of the interface between Ni and yttria-stabilized zirconia (YSZ) in the H2-H2O-Ni-YSZ electrode have been investigated in order to obtain knowledge on the effect of segregation of impurities to the electrode-electrolyte interface on performance. Even for a relatively pure nickel electrode, a film of impurities was found at the contact between Ni and YSZ and on the surface of YSZ. Impurity ridges were also found at the three-phase boundary. Impurities in these locations all have the potential of impeding processes and reactions at the electrode-electrolyte interface. The pure electrodes showed a lower resistance compared to most electrodes discussed in the literature.",

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AU - Norrman, Kion

AU - Mogensen, Mogens

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AB - The electrochemical properties of the interface between Ni and yttria-stabilized zirconia (YSZ) in the H2-H2O-Ni-YSZ electrode have been investigated in order to obtain knowledge on the effect of segregation of impurities to the electrode-electrolyte interface on performance. Even for a relatively pure nickel electrode, a film of impurities was found at the contact between Ni and YSZ and on the surface of YSZ. Impurity ridges were also found at the three-phase boundary. Impurities in these locations all have the potential of impeding processes and reactions at the electrode-electrolyte interface. The pure electrodes showed a lower resistance compared to most electrodes discussed in the literature.

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