Co-infiltration of Nickel and Mixed Conducting Gd0.1Ce0.9O2−δ and La0.6Sr0.3Ni0.15Cr0.85O3−δ Phases in Ni-YSZ Anodes for Improved Stability and Performance

Lu, Yanchen; Gasper, Paul; Nikiforov, A. I.; Pal, Uday B.; Gopalan, Srikanth; Basu, Soumendra N.

doi:10.1007/s11837-019-03723-1

Cited by 7 publications

(6 citation statements)

References 34 publications

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“…12,16,17 Separately, Ce 0.9 Gd 0.1 O 1.95 (GDC) has also been used as an infiltrant due to its mixed ionic and electronic conductivity (MIEC) in reducing environments, showing significant improvements in cell performance for GDC-infiltrated scaffolds. [18][19][20] In this work we demonstrate how repeated cycles and different infiltrant solutions affect Ni-YSZ electrode performance using symmetric cells. Results show that multiple infiltration cycles initially improve cells; however, further increasing infiltration cycles lead to diminishing returns, i.e.…”

Section: Supplementary Materials For This Article Is Available Onlinementioning

confidence: 92%

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Characterizing Performance of Electrocatalyst Nanoparticles Infiltrated into Ni-YSZ Cermet Anodes for Solid Oxide Fuel Cells

Rix

Pal

et al. 2020

J. Electrochem. Soc.

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The infiltration of nanoparticle electrocatalysts into solid oxide fuel cell (SOFC) electrodes has been proven to produce a high density of electrochemically active sites, and reduce charge transfer polarization losses for SOFC electrodes. This is crucial for intermediate temperature operation, as these losses increase greatly at lower temperatures. Nickel-yttria stabilized zirconia (Ni-YSZ) cermets are low-cost, and exhibit excellent stability, but their main disadvantage stems from nickel coarsening and performance loss over their operational lifetimes. Infiltration of electrocatalyst nanoparticles has been shown to mitigate nickel coarsening and the consequent anode degradation. In this study, the effects of these infiltrants are observed in a standard Ni-YSZ electrode. In addition to nickel, mixed ionic and electronic conducting (MIEC) phases were infiltrated into Ni-YSZ scaffolds and their performances were characterized using electrochemical impedance spectroscopy (EIS). Cross-sectional microscopy of fractured cells was used to compare electrode microstructure and particle statistics. A model is proposed for how the nanoparticle electrocatalysts improve the anode performance.

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Section: Supplementary Materials For This Article Is Available Onlinementioning

confidence: 92%

“…Equivalent circuit models were fit using R-RQ-RQ circuit based on previous work to isolate and identify the main polarization processes. 7,8,18 These processes were correlated with the spectra's DRT to compare process time constants and magnitudes.…”

Section: Methodsmentioning

confidence: 99%

Characterizing Performance of Electrocatalyst Nanoparticles Infiltrated into Ni-YSZ Cermet Anodes for Solid Oxide Fuel Cells

Rix

Pal

et al. 2020

J. Electrochem. Soc.

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“…The porous microstructure of SOFC electrodes correlates with the TPBs, gas diffusio and concentration polarization. Adding an interlayer such as an AFL between the electro lyte and anode, and impregnating electrocatalytic particles into the porous anode effec tively increased the TPBs and decreased the contact resistance between the electrolyte and the electrode [93][94][95][96]. However, the AFL and solution impregnation require additiona The porous microstructure of SOFC electrodes correlates with the TPBs, gas diffusion and concentration polarization.…”

Section: Psudo-core-shell Anode By Ultrasonic Spray Pyrolyzed Impregnationmentioning

confidence: 99%

An Overview on the Novel Core-Shell Electrodes for Solid Oxide Fuel Cell (SOFC) Using Polymeric Methodology

2021

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Lowering the interface charge transfer, ohmic and diffusion impedances are the main considerations to achieve an intermediate temperature solid oxide fuel cell (ITSOFC). Those are determined by the electrode materials selection and manipulating the microstructures of electrodes. The composite electrodes are utilized by a variety of mixed and impregnation or infiltration methods to develop an efficient electrocatalytic anode and cathode. The progress of our proposed core-shell structure pre-formed during the preparation of electrode particles compared with functional layer and repeated impregnation by capillary action. The core-shell process possibly prevented the electrocatalysis decrease, hindering and even blocking the fuel gas path through the porous electrode structure due to the serious agglomeration of impregnated particles. A small amount of shell nanoparticles can form a continuous charge transport pathway and increase the electronic and ionic conductivity of the electrode. The triple-phase boundaries (TPBs) area and electrode electrocatalytic activity are then improved. The core-shell anode SLTN-LSBC and cathode BSF-LC configuration of the present report effectively improve the thermal stability by avoiding further sintering and thermomechanical stress due to the thermal expansion coefficient matching with the electrolyte. Only the half-cell consisting of 2.75 μm thickness thin electrolyte iLSBC with pseudo-core-shell anode LST could provide a peak power of 325 mW/cm2 at 700 °C, which is comparable to other reference full cells’ performance at 650 °C. Then, the core-shell electrodes preparation by simple chelating solution and cost-effective one process has a potential enhancement of full cell electrochemical performance. Additionally, it is expected to apply for double ions (H+ and O2−) conducting cells at low temperature.

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“…Considering the current density of the cell using the Ni-SDC layer below 1.5 V, the decreased potential drop, in particular, the overpotential seems to be still strongly required. Compared with the deposited functional layer on the electrode surface, another method of fabricating electrodes by liquid infiltration has also been proposed [24][25][26]. This is because liquid infiltration enables the formation of nanostructured phases at temperatures as low as 773 K [24].…”

Section: Effect Of Ni-based Cathodic Layer On Steam Electrolysis Propmentioning

confidence: 99%

“…Compared with the deposited functional layer on the electrode surface, another method of fabricating electrodes by liquid infiltration has also been proposed [24][25][26]. This is because liquid infiltration enables the formation of nanostructured phases at temperatures as low as 773 K [24]. Gonzalez et al and Barnett et al infiltrated GDC into NiO-YSZ substrate by the liquid infiltration method, and the polarization resistance was significantly decreased [25,26].…”

Section: Effect Of Ni-based Cathodic Layer On Steam Electrolysis Propmentioning

confidence: 99%

Effect of Ni-based cathodic layer on intermediate temperature tubular electrolysis cell using LaGaO₃-based electrolyte thin film

Tan

Ishihara

2020

J. Phys. Energy

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NiO-YSZ tubular-type supported solid oxide electrolysis cell (SOEC) was prepared by dip-coating and co-sintering process for intermediate temperature steam electrolysis. To achieve a small overpotential, infiltration of Sm 0.5 Sr 0.5 CoO 3−δ (SSC) powder into porous La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3−δ (LSGM) layer on dense LSGM electrolyte film was performed for the air electrode. In this study, the effect of the Ni-Sm 0.2 Ce 0.8 O 2−δ (Ni-SDC) and Ni-Fe 2 O 3 (Ni-Fe) cathodic layer on steam electrolysis was further investigated. It was found that the Ni-based layer was effective for increasing electrolysis performance of the cell at low temperature in particular, but Ni-Fe layer was more effective. Impedance analysis suggests that this increased electrolysis performance of the cell using Ni-Fe layer was attributed to the decrease both in cathodic IR loss and overpotential. Electrolysis current density at 1.5 V was achieved to current density of 0.69, 0.47 and 0.28 A cm −2 at 873, 823 and 773 K, respectively. In addition, the overpotential was also decreased by the insertion of Ni-SDC layer, which shows the mixed conductivity. The long-term stability of the cell when using Ni-SDC layer was also measured up to 150 h and stable electrolysis performance was demonstrated (degradation rate: around 1.9%/100 h).

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Co-infiltration of Nickel and Mixed Conducting Gd0.1Ce0.9O2−δ and La0.6Sr0.3Ni0.15Cr0.85O3−δ Phases in Ni-YSZ Anodes for Improved Stability and Performance

Cited by 7 publications

References 34 publications

Characterizing Performance of Electrocatalyst Nanoparticles Infiltrated into Ni-YSZ Cermet Anodes for Solid Oxide Fuel Cells

Characterizing Performance of Electrocatalyst Nanoparticles Infiltrated into Ni-YSZ Cermet Anodes for Solid Oxide Fuel Cells

An Overview on the Novel Core-Shell Electrodes for Solid Oxide Fuel Cell (SOFC) Using Polymeric Methodology

Effect of Ni-based cathodic layer on intermediate temperature tubular electrolysis cell using LaGaO₃-based electrolyte thin film

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Co-infiltration of Nickel and Mixed Conducting Gd0.1Ce0.9O2−δ and La0.6Sr0.3Ni0.15Cr0.85O3−δ Phases in Ni-YSZ Anodes for Improved Stability and Performance

Cited by 7 publications

References 34 publications

Characterizing Performance of Electrocatalyst Nanoparticles Infiltrated into Ni-YSZ Cermet Anodes for Solid Oxide Fuel Cells

Characterizing Performance of Electrocatalyst Nanoparticles Infiltrated into Ni-YSZ Cermet Anodes for Solid Oxide Fuel Cells

An Overview on the Novel Core-Shell Electrodes for Solid Oxide Fuel Cell (SOFC) Using Polymeric Methodology

Effect of Ni-based cathodic layer on intermediate temperature tubular electrolysis cell using LaGaO3-based electrolyte thin film

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Effect of Ni-based cathodic layer on intermediate temperature tubular electrolysis cell using LaGaO₃-based electrolyte thin film