LaCoO3: Promising cathode material for protonic ceramic fuel cells based on a BaCe0.2Zr0.7Y0.1O3−δ electrolyte

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

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LaCoO3: Promising cathode material for protonic ceramic fuel cells based on a BaCe0.2Zr0.7Y0.1O3−δ electrolyte. / Ricote, Sandrine; Bonanos, Nikolaos; Lenrick, Filip; Wallenberg, Reine.

In: Journal of Power Sources, Vol. 218, 2012, p. 313-319.

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

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Author

Ricote, Sandrine; Bonanos, Nikolaos; Lenrick, Filip; Wallenberg, Reine / LaCoO3: Promising cathode material for protonic ceramic fuel cells based on a BaCe0.2Zr0.7Y0.1O3−δ electrolyte.

In: Journal of Power Sources, Vol. 218, 2012, p. 313-319.

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

Bibtex

@article{42485e4b31e741139f548f82a3cfe55b,
title = "LaCoO3: Promising cathode material for protonic ceramic fuel cells based on a BaCe0.2Zr0.7Y0.1O3−δ electrolyte",
keywords = "PCFC, BCZY, Lanthanum cobaltite, Cathode material, Infiltration",
publisher = "Elsevier S.A.",
author = "Sandrine Ricote and Nikolaos Bonanos and Filip Lenrick and Reine Wallenberg",
year = "2012",
doi = "10.1016/j.jpowsour.2012.06.098",
volume = "218",
pages = "313--319",
journal = "Journal of Power Sources",
issn = "0378-7753",

}

RIS

TY - JOUR

T1 - LaCoO<sub>3</sub>: Promising cathode material for protonic ceramic fuel cells based on a BaCe<sub>0.2</sub>Zr<sub>0.7</sub>Y<sub>0.1</sub>O<sub>3−δ</sub> electrolyte

A1 - Ricote,Sandrine

A1 - Bonanos,Nikolaos

A1 - Lenrick,Filip

A1 - Wallenberg,Reine

AU - Ricote,Sandrine

AU - Bonanos,Nikolaos

AU - Lenrick,Filip

AU - Wallenberg,Reine

PB - Elsevier S.A.

PY - 2012

Y1 - 2012

N2 - Symmetric cells (cathode/electrolyte/cathode) were prepared using BaCe0.2Zr0.7Y0.1O3−δ (BCZY27) as proton conducting electrolyte and LaCoO3 (LC) infiltrated into a porous BCZY27 backbone as cathode. Single phased LC was formed after annealing in air at 600 °C for 2 h. Scanning electron micrographs showed the presence of the infiltrated LC in the full cathode depth. Transmission electron micrographs revealed LC grains (60–80 nm) covering partly the BCZY27 grains (200 nm–1 μm). Impedance spectra were recorded at 500 °C and 600 °C, varying the oxygen partial pressure and the water vapour pressure. Two arcs correspond to the cathode contribution: a middle range frequency one (charge transfer) and a low frequency one (oxygen dissociation/adsorption). The area specific resistances (ASRs) of both contributions increase when decreasing the oxygen partial pressure. The low frequency arc is independent on the water vapour pressure while the charge transfer ASR values increase with higher pH2O. The cathode ASRs of 0.39 and 0.11 Ω cm2 at 500 and 600 °C respectively, in air (pH2O = 0.01 atm) are the lowest reported to the authors’ knowledge for PCFC cathodes. Furthermore, this work shows that the presence of oxide ion conduction in the cathode material is not necessary for good performance.

AB - Symmetric cells (cathode/electrolyte/cathode) were prepared using BaCe0.2Zr0.7Y0.1O3−δ (BCZY27) as proton conducting electrolyte and LaCoO3 (LC) infiltrated into a porous BCZY27 backbone as cathode. Single phased LC was formed after annealing in air at 600 °C for 2 h. Scanning electron micrographs showed the presence of the infiltrated LC in the full cathode depth. Transmission electron micrographs revealed LC grains (60–80 nm) covering partly the BCZY27 grains (200 nm–1 μm). Impedance spectra were recorded at 500 °C and 600 °C, varying the oxygen partial pressure and the water vapour pressure. Two arcs correspond to the cathode contribution: a middle range frequency one (charge transfer) and a low frequency one (oxygen dissociation/adsorption). The area specific resistances (ASRs) of both contributions increase when decreasing the oxygen partial pressure. The low frequency arc is independent on the water vapour pressure while the charge transfer ASR values increase with higher pH2O. The cathode ASRs of 0.39 and 0.11 Ω cm2 at 500 and 600 °C respectively, in air (pH2O = 0.01 atm) are the lowest reported to the authors’ knowledge for PCFC cathodes. Furthermore, this work shows that the presence of oxide ion conduction in the cathode material is not necessary for good performance.

KW - PCFC

KW - BCZY

KW - Lanthanum cobaltite

KW - Cathode material

KW - Infiltration

U2 - 10.1016/j.jpowsour.2012.06.098

DO - 10.1016/j.jpowsour.2012.06.098

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

VL - 218

SP - 313

EP - 319

ER -