Hysteresis in the solid oxide fuel cell cathode reaction

Torben Jacobsen; Birgit Zachau-Christiansen; Lasse Bay; M. Juhl Jørgensen

doi:10.1016/S0013-4686(00)00689-7

Hysteresis in the solid oxide fuel cell cathode reaction

Torben Jacobsen, Birgit Zachau-Christiansen, Lasse Bay, M. Juhl Jørgensen

Department of Chemistry

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

Abstract

The oxygen electrode reaction at the Pt/yttria-stabilised zirconia (YSZ) interface is investigated at 1000degreesC on Pt point electrodes on YSZ and YSZ point contacts on Pt. Linear potential sweeps show a pronounced non-linear current-voltage relation and inductive hysteresis, in particular at low sweep rates (similar1muVs/sup -1/). Correspondingly, an inductive behaviour is observed at low frequency by impedance measurements on polarised electrodes. The behaviour is attributed to a current-induced activation mechanism and subsequent deactivation at equilibrium conditions. Several mechanisms are discussed and rejected as responsible for the phenomena. Finally, the stability of the triple phase boundary is questioned and a current-sensitive reaction zone geometry is suggested as an explanation for the behaviour.

Original language	English
Journal	Electrochimica Acta
Volume	46
Issue number	7
Pages (from-to)	1019-1024
ISSN	0013-4686
DOIs	https://doi.org/10.1016/S0013-4686(00)00689-7
Publication status	Published - 2001

Keywords

autocatalysis
inductive effect
non-linearity
oxygen electrode
SOFC

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title = "Hysteresis in the solid oxide fuel cell cathode reaction",

abstract = "The oxygen electrode reaction at the Pt/yttria-stabilised zirconia (YSZ) interface is investigated at 1000degreesC on Pt point electrodes on YSZ and YSZ point contacts on Pt. Linear potential sweeps show a pronounced non-linear current-voltage relation and inductive hysteresis, in particular at low sweep rates (similar1muVs/sup -1/). Correspondingly, an inductive behaviour is observed at low frequency by impedance measurements on polarised electrodes. The behaviour is attributed to a current-induced activation mechanism and subsequent deactivation at equilibrium conditions. Several mechanisms are discussed and rejected as responsible for the phenomena. Finally, the stability of the triple phase boundary is questioned and a current-sensitive reaction zone geometry is suggested as an explanation for the behaviour.",

keywords = "autocatalysis, inductive effect, non-linearity, oxygen electrode, SOFC",

author = "Torben Jacobsen and Birgit Zachau-Christiansen and Lasse Bay and {Juhl J{\o}rgensen}, M.",

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TY - JOUR

T1 - Hysteresis in the solid oxide fuel cell cathode reaction

AU - Jacobsen, Torben

AU - Zachau-Christiansen, Birgit

AU - Bay, Lasse

AU - Juhl Jørgensen, M.

PY - 2001

Y1 - 2001

N2 - The oxygen electrode reaction at the Pt/yttria-stabilised zirconia (YSZ) interface is investigated at 1000degreesC on Pt point electrodes on YSZ and YSZ point contacts on Pt. Linear potential sweeps show a pronounced non-linear current-voltage relation and inductive hysteresis, in particular at low sweep rates (similar1muVs/sup -1/). Correspondingly, an inductive behaviour is observed at low frequency by impedance measurements on polarised electrodes. The behaviour is attributed to a current-induced activation mechanism and subsequent deactivation at equilibrium conditions. Several mechanisms are discussed and rejected as responsible for the phenomena. Finally, the stability of the triple phase boundary is questioned and a current-sensitive reaction zone geometry is suggested as an explanation for the behaviour.

AB - The oxygen electrode reaction at the Pt/yttria-stabilised zirconia (YSZ) interface is investigated at 1000degreesC on Pt point electrodes on YSZ and YSZ point contacts on Pt. Linear potential sweeps show a pronounced non-linear current-voltage relation and inductive hysteresis, in particular at low sweep rates (similar1muVs/sup -1/). Correspondingly, an inductive behaviour is observed at low frequency by impedance measurements on polarised electrodes. The behaviour is attributed to a current-induced activation mechanism and subsequent deactivation at equilibrium conditions. Several mechanisms are discussed and rejected as responsible for the phenomena. Finally, the stability of the triple phase boundary is questioned and a current-sensitive reaction zone geometry is suggested as an explanation for the behaviour.

KW - autocatalysis

KW - inductive effect

KW - non-linearity

KW - oxygen electrode

KW - SOFC

U2 - 10.1016/S0013-4686(00)00689-7

DO - 10.1016/S0013-4686(00)00689-7

M3 - Journal article

SN - 0013-4686

VL - 46

SP - 1019

EP - 1024

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 7

ER -

Hysteresis in the solid oxide fuel cell cathode reaction

Abstract

Keywords

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