Cathodic polarisation of composite LSCF-SDC IT-SOFC electrode synthesised by one-step microwave self-assisted combustion

Loureiro, Francisco J.A.; Macedo, Daniel A.; Nascimento, Rubens Maribondo do; Cesário, Moisés R.; Grilo, João P.F.; Yaremchenko, A.A.; Fagg, Duncan P.

doi:10.1016/j.jeurceramsoc.2019.01.013

Cited by 49 publications

(28 citation statements)

References 56 publications

(77 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cathode microstructure shown in this work is similar to the results presented by Loureiro et al. and Fu et al. .…”

Section: Resultssupporting

confidence: 90%

“…According to Loureiro et al. , this intimate distribution of particles is expected to improve the electrochemical activity of the cathode, due to providing large TPBs site density, well‐established ionic and electronic pathways. Moreover, a quite open microstructure and a well‐interconnected network are evident, which can allow the gas‐phase diffusion of oxygen molecules to the TPB zones.…”

Section: Resultsmentioning

confidence: 99%

“…According to Loureiro et al. , porous electrodes allow the reaction extend far away from the TPBs, towards the entire electrode | electrolyte interface, thus decrease the electrode activation polarization resistances. According to Ren et al.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

et al. 2019

View full text Add to dashboard Cite

Anode‐supported micro‐tubular SOFCs based on a proton and oxide ion mixed conductor electrolyte, BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb), have been successfully fabricated via phase‐inversion process. Typical micro‐tubular cell with the configuration of Ni‐BZCYYb|BZCYYb|La0.6Sr0.4Co0.2Fe0.8O3–δ, consists of anode support, electrolyte and cathode with thicknesses of 200, 12, and 10 μm, respectively. The cells show excellent electrochemical performance with the peak power densities of 1.040, 0.902, 0.721, and 0.590 W cm−2 at 750, 700, 650, and 600 °C, respectively, with humidified (3 vol.% H2O) hydrogen as fuel and ambient air as oxidant. The AC impedance spectroscopy result shows low concentration polarization values of 0.016–0.021 Ω cm2 at 750–600 °C. Further, significant performance enhancement is observed during long‐term stability test at 600 and 750 °C under constant voltage of 0.5 and 0.7 V over 120 h, respectively, indicating excellent stability of BZCYYb under fuel cell operating condition. The high performance is attributed to high‐quality cell, validated by the dense, crack‐free BZCYYb electrolyte film supported by the anode with micro sponge‐like pores.

show abstract

“…The cathode microstructure shown in this work is similar to the results presented by Loureiro et al. and Fu et al. .…”

Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Therefore, it can be stated that the setup allows obtaining a quasi-ideal symmetry between the two LSCF electrodes, indicating the accuracy of the measurements. For this LSCF electrode, the experimental polarization curves measured at 750°C, 700°C and 650°C under air are shown in Fig 4a . The electrode overpotential is lowered with increasing temperature as it could be expected from a thermal activation of the electrode reaction mechanism for LSCF-based electrodes [31,32,72,73].…”

Section: Experimental Results and Model Validation 41 Electrode 3d Reconstructions And Electrochemical Characterizationsmentioning

confidence: 98%

An Elementary Kinetic Model for the LSCF and LSCF-CGO Electrodes of Solid Oxide Cells: Impact of Operating Conditions and Degradation on the Electrode Response

Effori

Laurencin

Silva

et al. 2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

An elementary kinetic model was developed to predict the electrochemical response of porous LSCF and LSCF-CGO electrodes. The model was validated thanks to experiments performed on symmetrical cells using a three-electrode setup. After the model calibration on polarization curves, it has been shown that the model is able to simulate accurately the experimental impedance diagram at OCP and under polarization without additional fitting.Moreover, the evolution of the electrode polarization resistance with the oxygen partial pressure is well reproduced by the model. The electrodes reaction mechanism was thoroughly analyzed and it has been shown that the transition from the bulk path to the surface path depends on the temperature, the polarization and the oxygen partial pressure. The rate-determining steps for the LSCF electrode have been identified at OCP as function of the oxygen partial pressure.Finally, a sensitivity analysis has been performed to study the impact of LSCF demixing on the electrode performances. For a given decomposition, it has been highlighted that the surface passivation would be more impacting than the decrease of the ionic conductivity. Moreover, the impact of the LSCF decomposition would be more detrimental for the electrode performances evaluated in electrolysis mode.

show abstract

“…Moreover, LSCF is chemically and mechanically compatible with doped ceria electrolytes [21]. In order to increase the triple phase boundary (TPB) and, consequently, to produce more efficient cathodes, several research groups have conducted work to analyze the effect of combining electrolyte materials with LSCF (co-doped ceria-LSCF composite) [22]. Similar to GCO-LSCF the NCGO-LSCF composite allows profound oxygen exchange over the electrode surface to retain appreciable amounts of ionic and electronic conductivity at intermediate temperatures [23].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of novel NGCO-LSCF composite cathode for intermediate temperature solid oxide fuel cells

Samreen

Gálvez-Sánchez

Steinberger‐Wilckens

et al. 2020

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Link to publication on Research at Birmingham portal General rightsUnless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law.• Users may freely distribute the URL that is used to identify this publication.• Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research.• User may use extracts from the document in line with the concept of 'fair dealing' under the Copyright, Designs and Patents Act 1988 (?) • Users may not further distribute the material nor use it for the purposes of commercial gain.Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document.When citing, please reference the published version. Take down policyWhile the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

show abstract

Cathodic polarisation of composite LSCF-SDC IT-SOFC electrode synthesised by one-step microwave self-assisted combustion

Cited by 49 publications

References 56 publications

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

An Elementary Kinetic Model for the LSCF and LSCF-CGO Electrodes of Solid Oxide Cells: Impact of Operating Conditions and Degradation on the Electrode Response

Electrochemical performance of novel NGCO-LSCF composite cathode for intermediate temperature solid oxide fuel cells

Contact Info

Product

Resources

About

Cathodic polarisation of composite LSCF-SDC IT-SOFC electrode synthesised by one-step microwave self-assisted combustion

Cited by 49 publications

References 56 publications

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr0.1Ce0.7Y0.1Yb0.1O3−δ Proton Conducting Electrolyte

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr0.1Ce0.7Y0.1Yb0.1O3−δ Proton Conducting Electrolyte

An Elementary Kinetic Model for the LSCF and LSCF-CGO Electrodes of Solid Oxide Cells: Impact of Operating Conditions and Degradation on the Electrode Response

Electrochemical performance of novel NGCO-LSCF composite cathode for intermediate temperature solid oxide fuel cells

Contact Info

Product

Resources

About

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte