Synthesis and reactivity study of gadolinia doped ceria–nickel: A potential anode material for solid oxide fuel cell

Datta, Pradyot; Majewski, Peter; Aldinger, Fritz

doi:10.1016/j.jallcom.2007.01.143

Cited by 15 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Local Ni enrichment (Fig. 2(a) #3) was observed inside the GDC15 phase, similar as reported in [65], indicating that there is no reaction or solubility of Ni and GDC15 [65]. After ball-mixing, NiO exists in the mixture powder.…”

Section: Resultssupporting

confidence: 79%

Mechanical properties of BaCe0.65Zr0.2Y0.15O3- – Ce0.85Gd0.15O2- dual-phase proton-conducting material with emphasis on micro-pillar splitting

Zhou¹,

Malzbender²,

Zeng³

et al. 2022

Journal of the European Ceramic Society

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 79%

Mechanical properties of BaCe0.65Zr0.2Y0.15O3- – Ce0.85Gd0.15O2- dual-phase proton-conducting material with emphasis on micro-pillar splitting

Zhou¹,

Malzbender²,

Zeng³

et al. 2022

Journal of the European Ceramic Society

View full text Add to dashboard Cite

“…For instance, Linderoth et al 40 reported a solubility of NiO in 8YSZ, which decreases the ionic conductivity. In contrast, no solubility of Ni and NiO in CGO was reported by Datta et al 41 Furthermore, it is known from literature that Y 2 O 3 segregates from the ZrO 2 lattice, which is a main reason for the degradation of the ionic conductivity. 18,42 This also agrees with the experiments of Nakagawa et al, 20 who found that the polarization resistance of a Ni/YSZ anode decreases with increasing dopant concentration of Y 2 O 3 ͑0-8 mol %͒.…”

Section: B276mentioning

confidence: 90%

Degradation of SOFC Anodes upon Redox Cycling: A Comparison Between Ni/YSZ and Ni/CGO

Iwanschitz

Sfeir

Mai

et al. 2010

J. Electrochem. Soc.

114

104

View full text Add to dashboard Cite

In this experimental study, electrolyte-supported solid oxide fuel cells (SOFCs) with two different anodes were investigated. Specifically, the stability of cells with a nickel/8 mol % yttria-stabilized zirconia (Ni/8YSZ) cermet anodes was compared to those based on nickel/40 mol % gadolinia-doped ceria (Ni/CG40). For this, the cells were characterized by impedance spectroscopy as well as by four-point electrical conductivity measurements. A high frequency process was observed in the Ni/8YSZ anode, which was not detected in the Ni/CG40 anode. After eight redox cycles at 950°C , the cell with the Ni/8YSZ anode showed an increase in the polarization resistance mainly in the high frequency domain. However, the cell with the Ni/CG40 anode showed an increase in both ohmic and polarization resistances, the latter mainly in the low frequency domain. Compared with Ni/CG40, the degradation in Ni/8YSZ upon redox cycling was higher at 850°C but lower at 950°C . For the Ni/8YSZ anode, a significant degradation was seen in the first 3 h after a redox cycle. The increase in the ohmic resistance of the Ni/CG40-based cell is believed to correlate with a decrease in the electrical conductivity of the anode. The latter showed a strong decrease upon a subsequent redox cycling at 950°C . For the Ni/CG40 anode, the degradation in both the conductivity and electrochemical performance significantly improved by decreasing the operation temperature from 950 to 850°C .

show abstract

“…For all composite powders, the XRD patterns indicated the presence of ceria (CeO 2 ), with fluorite-type cubic structure and Fm3m space group as well as the presence of NiO. This result demonstrated that Ni did not form solid solution with cerium or europium oxides, although data in literature suggests no consensus on the Ni solubility in CeO 2 (DATTA et al, 2008). Table 1 shows that an increase in dopant concentration reduced the ceria crystallite size.…”

Section: Resultsmentioning

confidence: 88%

Microwave-Assisted Hydrothermal Synthesis of NiO-Ce_1-XEu_xO_2-δPowders for Fuel Cell Catalytic Anodes

Medeiros¹,

Martinelli²,

Melo³

et al. 2014

ECS Trans.

View full text Add to dashboard Cite

CeO2-based materials doped with rare earth (TR +3) can be used as alternative to traditional NiO-YSZ anodes in solid oxide fuel cells as they have higher ionic conductivity and lower ohmic losses compared to YSZ. Moreover, they allow fuel cell operation at lower temperatures (500-800°C). In the anode composition, the concentration of NiO acting as catalyst in YSZ provides high electrical conductivity and high electrochemical activity of reactions, promoting internal reform in the cell. In this work, NiO - Ce1-xEuxO2-δ compounds (x = 0.1, 0.2 and 0.3) have been synthesized by microwave-assisted hydrothermal method. The materials were characterized by TG, XRD, TPR and SEM-FEG techniques. The refinement of data obtained by X-ray diffraction showed the presence of ceria doped with europium crystallized in a cubic phase with fluorite structure, in addition to the presence of NiO. The microwave-assisted hydrothermal method showed significant reduction in the average particle size and good mass control of phase compositions compared to other chemical synthesis techniques.

show abstract

Synthesis and reactivity study of gadolinia doped ceria–nickel: A potential anode material for solid oxide fuel cell

Cited by 15 publications

References 39 publications

Mechanical properties of BaCe0.65Zr0.2Y0.15O3- – Ce0.85Gd0.15O2- dual-phase proton-conducting material with emphasis on micro-pillar splitting

Mechanical properties of BaCe0.65Zr0.2Y0.15O3- – Ce0.85Gd0.15O2- dual-phase proton-conducting material with emphasis on micro-pillar splitting

Degradation of SOFC Anodes upon Redox Cycling: A Comparison Between Ni/YSZ and Ni/CGO

Microwave-Assisted Hydrothermal Synthesis of NiO-Ce_1-XEu_xO_2-δPowders for Fuel Cell Catalytic Anodes

Contact Info

Product

Resources

About

Synthesis and reactivity study of gadolinia doped ceria–nickel: A potential anode material for solid oxide fuel cell

Cited by 15 publications

References 39 publications

Mechanical properties of BaCe0.65Zr0.2Y0.15O3- – Ce0.85Gd0.15O2- dual-phase proton-conducting material with emphasis on micro-pillar splitting

Mechanical properties of BaCe0.65Zr0.2Y0.15O3- – Ce0.85Gd0.15O2- dual-phase proton-conducting material with emphasis on micro-pillar splitting

Degradation of SOFC Anodes upon Redox Cycling: A Comparison Between Ni/YSZ and Ni/CGO

Microwave-Assisted Hydrothermal Synthesis of NiO-Ce1-XEuxO2-δ Powders for Fuel Cell Catalytic Anodes

Contact Info

Product

Resources

About

Microwave-Assisted Hydrothermal Synthesis of NiO-Ce_1-XEu_xO_2-δPowders for Fuel Cell Catalytic Anodes