Advanced Electrodes for Intermediate Temperature Proton Conducting Fuel Cell

Taillades, Gilles; Pers, Paul; Batocchi, Pierre; Taillades, Mélanie

doi:10.1149/05701.1289ecst

Cited by 10 publications

(3 citation statements)

References 12 publications

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“…One of the first examples, in 2009, is a BSCF-BCZY71 composite prepared by a modified Pechini method, which provided an MPD of 0.42 W•cm −2 and a low R p of 0.1 Ω•cm 2 at 700 • C with a BCZY71 electrolyte [148]. Taillades et al [149] then showed that a composite BSCF-BCY10 exhibited a lower ASR value (0.53 Ω•cm 2 at 600 • C) compared to pure BSCF. The same group subsequently fabricated a BSCF-BZCYYb1711 cathode deposited on a BCZYYb7111 electrolyte by wet powder spraying, achieving an MPD of 0.422 W•cm −2 at 600 • C [150].…”

Section: Composite Cathodesmentioning

confidence: 99%

Perspectives on Cathodes for Protonic Ceramic Fuel Cells

et al. 2021

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Protonic ceramic fuel cells (PCFCs) are promising electrochemical devices for the efficient and clean conversion of hydrogen and low hydrocarbons into electrical energy. Their intermediate operation temperature (500–800 °C) proffers advantages in terms of greater component compatibility, unnecessity of expensive noble metals for the electrocatalyst, and no dilution of the fuel electrode due to water formation. Nevertheless, the lower operating temperature, in comparison to classic solid oxide fuel cells, places significant demands on the cathode as the reaction kinetics are slower than those related to fuel oxidation in the anode or ion migration in the electrolyte. Cathode design and composition are therefore of crucial importance for the cell performance at low temperature. The different approaches that have been adopted for cathode materials research can be broadly classified into the categories of protonic–electronic conductors, oxide-ionic–electronic conductors, triple-conducting oxides, and composite electrodes composed of oxides from two of the other categories. Here, we review the relatively short history of PCFC cathode research, discussing trends, highlights, and recent progress. Current understanding of reaction mechanisms is also discussed.

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Section: Composite Cathodesmentioning

confidence: 99%

Perspectives on Cathodes for Protonic Ceramic Fuel Cells

et al. 2021

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“…The analysis of what happens at the interface between proton-conducting electrolytes and electrodes is necessarily related to the different device fabrication procedures and to the specific electrolyte-electrode couples. The assembly of a proton-conducting oxide with air electrodes already designed for O-SOC devices was initially pursued − and continues to this day. − A straightforward method to assess the electrode–electrolyte reactivity is by mixing the two compounds, forming a pellet to ensure the closest contact, annealing at a suitable temperature for a given time, and then carrying out an XRD measurement. This procedure is frequently exploited: in some cases, a shift of diffraction peaks is observed, originated by diffusion into the host matrix of cations with a different size compared to the regular species; − in other cases, the growth of a new phase may occur, , or the stability of the involved oxides is eventually demonstrated .…”

Section: Cathode Interfacesmentioning

confidence: 99%

Solid–Solid Interfaces in Protonic Ceramic Devices: A Critical Review

Chiara

Giannici

Pipitone

et al. 2020

ACS Appl. Mater. Interfaces

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The literature concerning protonic ceramic devices is critically reviewed focusing the reader’s attention on the structure, composition, and phenomena taking place at solid–solid interfaces. These interfaces play a crucial role in the overall device performance, and the relevance of understanding the phenomena taking place at the interfaces for the further improvement of electrochemical protonic ceramic devices is therefore stressed. The grain boundaries and heterostructures in electrolytic membranes, the electrode–electrolyte contacts, and the interfaces within composite anode and cathode materials are all considered, with specific concern to advanced techniques of characterization and to computational modeling by ab initio approaches. An outlook about future developments and improvements highlights the necessity of a deeper insight into the advanced analysis of what happens at the solid–solid interfaces and of in situ/operando investigations that are presently sporadic in the literature on protonic ceramic devices.

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“…Cermets consisting of Ni and a proton-conducting oxide, such as Ni-BCY [20] and Ni-BCZY [21], are frequently used as the anode materials in PCFCs. Studies on PCFC anodes have demonstrated that the proton conductivity of the proton-conducting oxide phase strongly affects the anodic properties.…”

Section: Introductionmentioning

confidence: 99%

Anodic Performance of Ni–BCZY and Ni–BCZY–GDC Films on BCZY Electrolytes

Itagaki,

Kumamoto,

Okayama

et al. 2023

Ceramics

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Cermet films consisting of Ni, BaCe0.4Zr0.4Y0.2O3−δ (BCZY), and Gd0.1Ce0.9Ox (GDC), specifically, 60 wt%Ni–BCZY, 60 wt%Ni–BCZY–GDC, and 60 wt%Ni–GDC, were formed on BCZY electrolyte supports as anodes of proton ceramic fuel cells (PCFCs). The Ni grain size in these films after sintering at 1450 °C was around 2 μm. The GDC addition did not affect the Ni grain size in the case of the BCZY matrix. The anodic properties greatly depended on the oxide phase composition and worsened with increasing the GDC content. This probably occurred because of the addition of GDC, which has low proton conductivity and inhibited the proton conduction path of BCZY, reducing three-phase boundaries in the anode bulk. Since BCZY has a lower grain growth rate during sintering than BaCe0.8Y0.2O3−δ, the Ni grain growth was likely suppressed by the surrounding Ni grains containing small BCZY grains.

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Advanced Electrodes for Intermediate Temperature Proton Conducting Fuel Cell

Cited by 10 publications

References 12 publications

Perspectives on Cathodes for Protonic Ceramic Fuel Cells

Perspectives on Cathodes for Protonic Ceramic Fuel Cells

Solid–Solid Interfaces in Protonic Ceramic Devices: A Critical Review

Anodic Performance of Ni–BCZY and Ni–BCZY–GDC Films on BCZY Electrolytes

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