Electrolyte‐Free
            <scp>SOFCs</scp>

Fan, Liangdong; Kim, Jung‐Sik; Lund, Peter

doi:10.1002/9783527812790.ch6

Cited by 3 publications

(1 citation statement)

References 70 publications

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“…Finally, the electrodes are often connected to the external electrical circuit using bi-polar plates (BPP). Although these materials describe many state-of-the-art SOFC designs, various alternatives are being proposed, such as: rare earth oxide doping [3]; nanoparticle impregnation of manganite structures [4]; geopolymer/ceria for lower temperatures [5]; metal-supported [6]; single-layer and electrolyte-free cells [7].…”

Section: Introductionmentioning

confidence: 99%

The Role of Bi-Polar Plate Design and the Start-Up Protocol in the Spatiotemporal Dynamics during Solid Oxide Fuel Cell Anode Reduction

et al. 2020

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Start-up conditions largely dictate the performance longevity for solid oxide fuel cells (SOFCs). The SOFC anode is typically deposited as NiO-ceramic that is reduced to Ni-ceramic during start-up. Effective reduction is imperative to ensuring that the anode is electrochemically active and able to produce electronic and ionic current; the bi-polar plates (BPP) next to the anode allow the transport of current and gases, via land and channels, respectively. This study investigates a commercial SOFC stack that failed following a typical start-up procedure. The BPP design was found to substantially affect the spatiotemporal dynamics of the anode reduction; Raman spectroscopy detected electrochemically inactive NiO on the anode surface below the BPP land-contacts; X-ray computed tomography (CT) and scanning electron microscopy (SEM) identified associated contrasts in the electrode porosity, confirming the extension of heterogeneous features beyond the anode surface, towards the electrolyte-anode interface. Failure studies such as this are important for improving statistical confidence in commercial SOFCs and ultimately their competitiveness within the mass-market. Moreover, the spatiotemporal information presented here may aid in the development of novel BPP design and improved reduction protocol methods that minimize cell and stack strain, and thus maximize cell longevity.

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Section: Introductionmentioning

confidence: 99%

The Role of Bi-Polar Plate Design and the Start-Up Protocol in the Spatiotemporal Dynamics during Solid Oxide Fuel Cell Anode Reduction

et al. 2020

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Progress in nano-technology development and nano-material selection for low-temperature solid oxide fuel cell

Shaheen,

Chen,

Nong

et al. 2024

Journal of Alloys and Compounds

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The Composite La_2-xNd_xCe₂O_7-δ Material for New Energy Conversion Devices: A Physiochemical and Electrochemical Study

Bukhari,

Mohsin,

Kayani

et al. 2024

ACS Appl. Energy Mater.

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In this study, the composite La 2-x Nd x Ce 2 O 7-δ with different concentrations of La 3+ and Nd 3+ in ceria is prepared through the sol−gel method for a new energy conversion device referred to as single-component solid oxide fuel cell (SC-SOFC). The XRD patterns reveal a fluorite cubic structure for all La 2-x Nd x Ce 2 O 7-δ samples. The SEM analysis revealed that La 2-x Nd x Ce 2 O 7-δ (x = 0.5, 1, 1.5) materials exhibit fine agglomeration of irregular grains and nonhomogeneous flakes for the La 2-x Nd x Ce 2 O 7 (x = 0 and 2) samples. Furthermore, FTIR results indicate the presence of nitrates in the composites. In Raman spectra, the F 2g mode is associated with the space group (Fm3m), which confirms the fluorite structure. Further, Raman spectroscopy shows the shifting of peaks to higher frequencies for La 2-x Nd x Ce 2 O 7-δ (x = 0.5, 1, 1.5) samples. The conductivity of La 1.5 Nd 0.5 Ce 2 O 7-δ material shows an exceptional result, with a total conductivity of 0.10 S cm −1 at 600 °C. The Nyquist plot of sample La 1.5 Nd 0.5 Ce 2 O 7-δ shows a reduction of ohmic resistance (R o ) with increasing temperature, confirming the stability for all prepared materials. The La 1.5 Nd 0.5 Ce 2 O 7-δ composite shows a maximum power density of ∼639 mW cm −2 at 600 °C. Therefore, the composite La 2-x Nd x Ce 2 O 7-δ with Ni 0.8 Co 0.15 Al 0.05 LiO 2 as a semionic conductor has good potential as a single-component energy conversion device.

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Electrolyte‐Free SOFCs

Cited by 3 publications

References 70 publications

The Role of Bi-Polar Plate Design and the Start-Up Protocol in the Spatiotemporal Dynamics during Solid Oxide Fuel Cell Anode Reduction

The Role of Bi-Polar Plate Design and the Start-Up Protocol in the Spatiotemporal Dynamics during Solid Oxide Fuel Cell Anode Reduction

Progress in nano-technology development and nano-material selection for low-temperature solid oxide fuel cell

The Composite La_2-xNd_xCe₂O_7-δ Material for New Energy Conversion Devices: A Physiochemical and Electrochemical Study

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Electrolyte‐Free SOFCs

Cited by 3 publications

References 70 publications

The Role of Bi-Polar Plate Design and the Start-Up Protocol in the Spatiotemporal Dynamics during Solid Oxide Fuel Cell Anode Reduction

The Role of Bi-Polar Plate Design and the Start-Up Protocol in the Spatiotemporal Dynamics during Solid Oxide Fuel Cell Anode Reduction

Progress in nano-technology development and nano-material selection for low-temperature solid oxide fuel cell

The Composite La2-xNdxCe2O7-δ Material for New Energy Conversion Devices: A Physiochemical and Electrochemical Study

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About

The Composite La_2-xNd_xCe₂O_7-δ Material for New Energy Conversion Devices: A Physiochemical and Electrochemical Study