Evaluating the effect of Pr-doping on the performance of strontium-doped lanthanum ferrite cathodes for protonic SOFCs

Ma, Jinming; Tao, Zetian; Kou, Hongning; Fronzi, Marco; Bi, Lei

doi:10.1016/j.ceramint.2019.10.017

Cited by 85 publications

(25 citation statements)

References 36 publications

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“…Wherein, it was worth noting that GDC-Na 2 CO 3 was an ion conducting material with negligible electron conduction, and it can simultaneously conduct proton and oxygen ions. [34] By comparison, the GDC-NBSCu composite was a kind of (O 2À /e À ) dual conductor, the electron conductivity should come from the semiconductor property of NBSCu, and the oxygen ion conduction was mainly attributed to GDC component. Obviously, the two composites had different ion conduction manner.…”

Section: Working Principlementioning

confidence: 99%

Improving Grain Boundary Conductivity of Ce_0.9Gd_0.1O_2 − δ Electrolyte through Compositing with Carbonate or Semiconductor

et al. 2020

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In the solid oxide fuel cell field, heterogeneous ion doping is a common methodology to improve the ionic conductivity of electrolytes, but overwhelming grain boundary resistance is still the main obstacle for low‐temperature applications. According to previous reports, building rapid ion transport at the grain boundary through compositing methods was considered as a proposed design for electrolytes to decrease the grain boundary resistance and obtain high ionic conductivity. Herein, Ce0.9Gd0.1O2 − δ (GDC) is selected as the matrix material and composited with Na2CO3 and NdBa0.5Sr0.5Cu2O5 + δ (NBSCu) to form GDC‐Na2CO3 nanocomposite and GDC‐NBSCu composite. The grain boundary conductivity (σb) is delicately separated from the EIS results, demonstrating that the σb of GDC‐NBSCu and GDC‐Na2CO3 composite are both substantially higher than that of pure GDC. Therefore, the power density maximum of GDC‐NBSCu and GDC‐Na2CO3 electrolyte is 726 mW cm−2 at 600 °C and 797 mW cm−2 at 575 °C, respectively. Variety of characterization reveales that the proton contributes to the enhancement of σb in GDC‐Na2CO3, while the band energy alignment between GDC and NBSCu works as an accelerator to promote the ionic conduction for GDC‐NBSCu.

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Section: Working Principlementioning

confidence: 99%

Improving Grain Boundary Conductivity of Ce_0.9Gd_0.1O_2 − δ Electrolyte through Compositing with Carbonate or Semiconductor

et al. 2020

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“…A commonly used cell fabrication method is the typical dry‐pressing anode substrate preparation, where the anode is fired alone or copressed and cofired with the electrolyte layer, followed by painting of the cathode slurry onto the electrolyte layer. [ 64–66 ] Other cell fabrication methods have also been applied, such as tape casting, gel casting, phase inversion for anode preparation, spin coating, solution coating, pressurized spray coating of the electrolyte onto the anode layer, and screen printing or painting of the cathode onto the electrolyte layer. In this report, we used a typical dry‐pressing method to prepare the anode substrate, which revealed the greatest performance at 700 °C compared with the reported values based on dry‐pressed anodes.…”

Section: Resultsmentioning

confidence: 99%

A New High‐Performance Proton‐Conducting Electrolyte for Next‐Generation Solid Oxide Fuel Cells

et al. 2020

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Conventional solid oxide fuel cells (SOFCs) are operable at high temperatures (700–1000 °C) with the most commonly used electrolyte, yttria‐stabilized zirconia (YSZ). SOFC research and development activities have thus been carried out to reduce the SOFC operating temperature. At intermediate temperatures (400–700 °C), barium cerate (BaCeO3) and barium zirconate (BaZrO3) are good candidates for use as proton‐conducting electrolytes due to their promising electrochemical characteristics. Herein, two widely studied proton‐conducting materials with two dopants are combined and an attractive composition for the investigation of electrochemical behaviors is discovered. Ba0.9Sr0.1Ce0.5Zr0.35Y0.1Sm0.05O3−δ (BSCZYSm), a perovskite‐type polycrystalline material, has shown very promising properties to be used as proton‐conducting electrolyte at intermediate temperature range. BSCZYSm shows a high proton conductivity of 4.167 × 10−3 S cm−1 in a wet argon atmosphere and peak power density of 581.7 mW cm−2 in Ni–BSCZYSm | BSCZYSm | BSCF cell arrangement at 700 °C, which is one of the highest in comparison with proton‐conducting electrolyte‐based fuel cells reported until now.

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“…Materials synthesis LNF SSC and BZCY powders were synthesized through a conventional combustion method with citric acid as the combustion agent [3,19,20] powders. All the raw materials were bought from Aladdin Corporation and the detailed synthesize process can been found in our previous studies [21].…”

Section: Methodsmentioning

confidence: 99%

“…Proton solid oxide fuel cells (H-SOFCs) has been attracting much attention over the past decades for its lower ion conduction activation energy and higher cell conversion e ciency than traditional oxygen ion SOFC, making it easy for protons to pass through the dense electrolyte layer to the cathode at intermediate temperature [1][2][3]. In addition, it doesn't lead to dilution of H 2 as water is produced on the cathode side in H-SOFC [4].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Study of LaNi0.6Fe0.4O3-δ and Sm0.5Sr0.5CoO3-δ Composite Cathode

Tao¹,

Liu²,

Fu³

et al. 2021

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In this paper, the composite cathode material of of LaNi0.6Fe0.4O3-δ(LNF) and Sm0.5Sr0.5CoO3-δ(SSC) is investigated and the cell performance of BaCe0.7Y0.2Zr0.1O3-δ(BZCY)-based proton-conducting solid oxide fuel cell (H-SOFC) is evaluated. LNF powders and SSC powders with different ratios (1:0, 7:3, 5:5, 3:7, 0:1 wt. %) are mixed as the composite cathode to explore the optimized composition. The phase structure of the fabricated cathode powders is analyzed through X-ray diffraction method (XRD) and no second phase was observed below 1000oC, showing good chemical compatibility. The electrochemical properties consisted of I-V and EIS curves reveal that the single cell with LNF-SSC73 cathode has the best electrochemical performance, exhibiting a polarization resistance of 0.10 Ω·cm2 and a relatively high maximum power density of 636 mWcm2 at 700oC. These results above indicate that LNF-SSC73 composite material could improve the performance of fuel cells, which would be a prospective material in the field of H-SOFC.

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Evaluating the effect of Pr-doping on the performance of strontium-doped lanthanum ferrite cathodes for protonic SOFCs

Cited by 85 publications

References 36 publications

Improving Grain Boundary Conductivity of Ce_0.9Gd_0.1O_2 − δ Electrolyte through Compositing with Carbonate or Semiconductor

Improving Grain Boundary Conductivity of Ce_0.9Gd_0.1O_2 − δ Electrolyte through Compositing with Carbonate or Semiconductor

A New High‐Performance Proton‐Conducting Electrolyte for Next‐Generation Solid Oxide Fuel Cells

Fabrication and Study of LaNi0.6Fe0.4O3-δ and Sm0.5Sr0.5CoO3-δ Composite Cathode

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Evaluating the effect of Pr-doping on the performance of strontium-doped lanthanum ferrite cathodes for protonic SOFCs

Cited by 85 publications

References 36 publications

Improving Grain Boundary Conductivity of Ce0.9Gd0.1O2 − δ Electrolyte through Compositing with Carbonate or Semiconductor

Improving Grain Boundary Conductivity of Ce0.9Gd0.1O2 − δ Electrolyte through Compositing with Carbonate or Semiconductor

A New High‐Performance Proton‐Conducting Electrolyte for Next‐Generation Solid Oxide Fuel Cells

Fabrication and Study of LaNi0.6Fe0.4O3-δ and Sm0.5Sr0.5CoO3-δ Composite Cathode

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Improving Grain Boundary Conductivity of Ce_0.9Gd_0.1O_2 − δ Electrolyte through Compositing with Carbonate or Semiconductor

Improving Grain Boundary Conductivity of Ce_0.9Gd_0.1O_2 − δ Electrolyte through Compositing with Carbonate or Semiconductor