Ni-YSZ cermets for solid oxide fuel cell anodes via two-step firing

Davarpanah, Amin; Yaremchenko, A.A.; Fagg, Duncan P.; Frade, J.R.

doi:10.1016/j.ijhydene.2014.07.053

Cited by 9 publications

(4 citation statements)

References 41 publications

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“…The reduced Ni/ScSZ samples has higher total conductivity than NiO/ScSZ. Although, there are only few or no reports for the total conductivity of Ni/ Zr 0.84 Sc 0.16 O 1.92 with 1:1 wt % composition, the conductivity is lower if compared to the reported Ni/YSZ cermet, which is about 300-1000 S/cm [17,18]. This may be due to the limitation of the EIS measurement employed in this study compared to the four-point probe direct current (DC) technique.…”

Section: Resultsmentioning

confidence: 83%

Morphology and Structure of Ni/Zr0.84Sc0.16O1.92 Electrode Material Synthesized via Glycine-Nitrate Combustion Method for Solid Oxide Electrochemical Cell

Garcia

Cervera

2019

Applied Sciences

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Nickel oxide and Sc-doped ZrO2 electrode material with a 1:1 wt % composition of NiO and Zr0.84Sc0.16O1.92 was synthesized via a single-step glycine-nitrate combustion method. Different glycine to nitrate (g/n) molar ratios of 0.27, 0.54, and 1.1 were used to investigate its effect on the structural, morphological, and electrical properties of the heat-treated samples. X-ray diffraction (XRD) patterns of the as-sintered samples for all the g/n ratios were indexed to cubic phases of NiO and ScSZ. Upon reduction at 700 °C, NiO was fully reduced to Ni. In-situ XRD patterns showed that the composite Ni/Zr0.84Sc0.16O1.92 electrode material retains its cubic structure at intermediate temperatures from 500 °C to 800 °C. High magnification scanning electron microscopy (SEM) images revealed that nanoparticles of Ni are also formed and situated at the surfaces of ScSZ grains, apart from agglomerated submicron particles of Ni. SEM and electron-dispersive spectroscopy mapping revealed interconnected grains of ScSZ oxide-ion conducting phase. From the calculated conductivity based on electrochemical impedance spectroscopy results, the 0.27 g/n ratio showed an order of magnitude-higher total conductivity among the other prepared samples.

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Section: Resultsmentioning

confidence: 83%

Morphology and Structure of Ni/Zr0.84Sc0.16O1.92 Electrode Material Synthesized via Glycine-Nitrate Combustion Method for Solid Oxide Electrochemical Cell

Garcia

Cervera

2019

Applied Sciences

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“…In the actual work one intended to minimize undue microstructural changes, such as loss of porosity yielded by the dispersed droplets of organic phase. Controlled microstructural changes are also expected for zirconia-based 2phase systems [24], probably requiring higher temperatures to overcome constraints imposed by a secondary refractory phase. Thus, the levels of isothermal plateau for the actual TZP-Al 2 O 3 cellular ceramics were 200ºC higher than demonstrated for single-phase TZP [23].…”

Section: Methodsmentioning

confidence: 99%

Microstructural design of cellular 3 YTZ-Al2O3 ceramic membranes

Ivanova

Lopes

Durana

et al. 2021

Ceramics International

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“…Pengukuran impedansi dalam penelitian ini dilakukan pada rentang frekuensi 20 -5 Hz dan kisaran suhu 300 -600 o C. Penggunaan pasta perak sebagai elektroda pengukuran impedansi tidak memungkinkan untuk melakukan pengukuran pada suhu di atas 600 o C, karena ada kemungkinan pasta perak akan meleleh dan terdifusi ke dalam material yang sedang diukur. Pengukuran suhu tinggi, > 600 o C membutuhkan pasta platina, sehingga dimungkinkan konduktivitas total dari Ni-YSZ yang terukur lebih tinggi, seperti halnya pengukuran pada Ni-YSZ 37 yang disintesis dari zirconia komersial, yaitu antara 170 -240 S.cm -1 (Davarpanah et al, 2014).…”

Section: Conductivity (S/cm)unclassified

SYNTHESIS AND CHARACTERIZATION OF CERAMIC METAL Ni-YSZ PREPARED FROM LOCAL ZIRCON SAND AT VARIOUS Ni:YSZ COMPOSITION

et al. 2017

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This research synthesized a cermet Ni-YSZ, in which the YSZ (yttria stabilized-zirconia) was synthesized from the local zircon sand, ZrSiO4, as a side product of tin mining plant in Bangka island, Indonesia. The synthesized YSZ in this research is zirconia, ZrO2 doped by 8 % mol of yttrium dioxide. The synthesis used solid state reaction method and the result was characterized its crystal structure and its cell parameters by XRD analysis equipped with Le Bail refinement, surface morphology analysis, and an impedance analysis to understand its ionic conductivity. The cermet Ni-YSZ was synthesized at a various composition of Ni:YSZ i.e., 20:80, 30:70, and 40:60 (b/b). The analysis shows that Ni-YSZ is in two phases of Ni and YSZ without any presence of a third phase. It indicates that there was no solid state reaction between Ni and YSZ during synthesis. In this Ni-YSZ cermet, the Ni phase in a cubic structure, and the YSZ is also in a cubic structure. Morphological study shows that the addition of Ni to YSZ allows the morphology to become more roughness with larger grain size. This research found that the Ni-YSZ 20:80 has highest ionic conductivity.

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Ni-YSZ cermets for solid oxide fuel cell anodes via two-step firing

Cited by 9 publications

References 41 publications

Morphology and Structure of Ni/Zr0.84Sc0.16O1.92 Electrode Material Synthesized via Glycine-Nitrate Combustion Method for Solid Oxide Electrochemical Cell

Morphology and Structure of Ni/Zr0.84Sc0.16O1.92 Electrode Material Synthesized via Glycine-Nitrate Combustion Method for Solid Oxide Electrochemical Cell

Microstructural design of cellular 3 YTZ-Al2O3 ceramic membranes

SYNTHESIS AND CHARACTERIZATION OF CERAMIC METAL Ni-YSZ PREPARED FROM LOCAL ZIRCON SAND AT VARIOUS Ni:YSZ COMPOSITION

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