Synthesis and characterization of Ni-cermet/proton conducting thin film electrolyte symmetrical assemblies

Essoumhi, A.; Taillades, Gilles; Taillades-Jacquin, Mélanie; Jones, Deborah J.; Rozière, Jacqués

doi:10.1016/j.ssi.2008.07.025

Cited by 37 publications

(31 citation statements)

References 6 publications

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“…These results highlight that the presence of a percolation pathway through the Ni particles is critical to ensure suitable fuel cell performance. Interestingly, the conductivity of the BCY electrolyte was smaller for the anode containing 35 vol.% of Ni [48]. As suggested by the authors, this could be due to the low anode porosity, which led to reduced gas diffusion, and, in turn, to insufficient electrolyte hydration.…”

Section: Anode Materials For Htpc Electrolytesmentioning

confidence: 78%

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Electrode materials: a challenge for the exploitation of protonic solid oxide fuel cells

Fabbri

Pergolesi

Traversa

2010

Science and Technology of Advanced Materials

131

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High temperature proton conductor (HTPC) oxides are attracting extensive attention as electrolyte materials alternative to oxygen-ion conductors for use in solid oxide fuel cells (SOFCs) operating at intermediate temperatures (400-700• C). The need to lower the operating temperature is dictated by cost reduction for SOFC pervasive use. The major stake for the deployment of this technology is the availability of electrodes able to limit polarization losses at the reduced operation temperature. This review aims to comprehensively describe the state-of-the-art anode and cathode materials that have so far been tested with HTPC oxide electrolytes, offering guidelines and possible strategies to speed up the development of protonic SOFCs.

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Section: Anode Materials For Htpc Electrolytesmentioning

confidence: 78%

“…Essoumhi et al [48] investigated the porosity and the electrical conductivity of two different anode cermets made of Ni-BCY, containing 35 and 45 vol.% of Ni (corresponding to 50 and 60 wt% of NiO). The anodes were prepared by mixing commercial NiO powders with BCY powders produced by flash combustion method.…”

Section: Anode Materials For Htpc Electrolytesmentioning

confidence: 99%

Electrode materials: a challenge for the exploitation of protonic solid oxide fuel cells

Fabbri

Pergolesi

Traversa

2010

Science and Technology of Advanced Materials

131

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“…By analogy with Ni-YSZ composite anode, most of the studies in H-SOFCs are also reported on Ni-proton conducting ceramic phase composites such as Ni-SrCe 0.9 Yb 0.1 O 3-δ (SCYb), Ni-BaCe 0.9 Y 0.1 O 3-δ (BCY10), and Ni-BaZr 0.8 Y 0.2 O 3-δ (BZY20) Essoumhi, Taillades, Taillades-Jacquin, Jones, & Rozière, 2008;. Symmetrical cells studies on Ni33-SCYb (33 vol.…”

Section: Introductionmentioning

confidence: 99%

“…%) and Ni50-BZY20 (50 wt. % Ni) showed area specific polarization resistance (ASR) of about 10, 0.32 and 0.37 Ω.cm 2 at 600 ºC under humid fuels Essoumhi et al, 2008;.…”

Section: Introductionmentioning

confidence: 99%

Ni-Ba0.5Sr0.5Ce0.6Zr0.2Gd0.1Y0.1O3-Delta Anode Composites for Proton Conducting Solid Oxide Fuel Cells (H-SOFCs)

Singh¹,

Baral²,

Thangadurai³

2016

JMSR

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In this paper, we report the electrochemical properties of Ni-Ba 0.5 Sr 0.5 Ce 0.6 Zr 0.2 Gd 0.1 Y 0.1 O 3-δ (BSCZGY) anode composites in 3% H 2 O-H 2 for proton conducting solid oxide fuel cells (H-SOFCs). Ni-BSCZGY composites with volume ratio of 30:70, 40:60, and 50:50 were synthesised through mechanical mixing and combustion methods. In combustion method, auto-ignition step led to brown coloured ash, which was calcined at 1000

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“…In this respect, PCFC anodes have been reported to offer the highest electrochemical performance at the lowest porosities [8,27]; a factor that is in direct conflict with the aforementioned criterion for redox stability. The PCFC anodes in the current work were formed without the use of additional porogens and correspond to peak electrochemically performing cermets with final porosity levels of ~34% [8,33]. This value is much lower than that of state of the art oxide-ion conducing SOFC anodes, which typically contain porosity levels ~50% [34].…”

Section: Esem Analysismentioning

confidence: 92%

In-situ redox cycling behaviour of Ni–BaZr0.85Y0.15O3−δ cermet anodes for Protonic Ceramic Fuel Cells

Nasani¹,

Willinger²,

Yaremchenko³

et al. 2014

International Journal of Hydrogen Energy

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Abstract:The current work investigates the redox behaviour of peak performing NiBaZr 0.85 Y 0.15 O 3- (Ni-BZY) cermet anodes for protonic ceramic fuel cells (PCFCs) by electrochemical impedance measurements, scanning electron microscopy (SEM) and Xray diffraction (XRD). Peak performing PCFC cermet anodes are documented to require much lower porosity levels than those needed in oxide-ion conducting counterparts. The polarisation behaviour of these optimised PCFC anodes is shown to be drastically impaired by redox cycling, with depletions in performance that correspond to around 80% of the original resistance values noted after the first redox cycle. The ohmic resistance (Rohmic) is also shown to be increased due to delamination at the electrode/electrolyte interface, as confirmed by postmortem microstructural analysis. Insitu measurements by environmental scanning microscopy (ESEM) reveal that degradation proceeds due to volume expansion of the nickel phase during the reoxidation stage of redox cycling. The present study reveals degradation to be very fast for peak performing Ni-BZY cermets of low porosity. Hence, methods to improve redox stability can be considered to be essential before such anodes can be implemented in practical devices.

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Synthesis and characterization of Ni-cermet/proton conducting thin film electrolyte symmetrical assemblies

Cited by 37 publications

References 6 publications

Electrode materials: a challenge for the exploitation of protonic solid oxide fuel cells

Electrode materials: a challenge for the exploitation of protonic solid oxide fuel cells

Ni-Ba0.5Sr0.5Ce0.6Zr0.2Gd0.1Y0.1O3-Delta Anode Composites for Proton Conducting Solid Oxide Fuel Cells (H-SOFCs)

In-situ redox cycling behaviour of Ni–BaZr0.85Y0.15O3−δ cermet anodes for Protonic Ceramic Fuel Cells

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