Impedance spectroscopy on YSZ with iron oxide as additive

Matsui, Noboru; Takigawa, M.

doi:10.1016/0167-2738(90)90155-k

Cited by 22 publications

(11 citation statements)

References 3 publications

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“…Stable mixed ionic and electronic conducting oxides with the fluorite structure show some very attractive characteristics for the use as a matrix in anode materials in SOFCs. Some authors mentioned the use of ceria (2,3), titania (4-10), ruthenium oxide (11,12), terbia (13), iron (14,15), and Mn 2 O 3 (16) for this purpose. Yttria-stabilized zirconia with 1-12 mol% TiO 2 dopant is considered as a promising candidate for SOFC anodes because they have excellent stability at high temperatures, good compatibility with the YSZ electrolyte, mixed conductivity, and electrocatalytic activity.…”

Section: Introductionmentioning

confidence: 98%

Structure, Microstructure, and Mixed Conduction of [(ZrO2)0.92(Y2O3)0.08]0.9(TiO2)0.1

Colomer¹,

Jurado²

2002

Journal of Solid State Chemistry

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Section: Introductionmentioning

confidence: 98%

Structure, Microstructure, and Mixed Conduction of [(ZrO2)0.92(Y2O3)0.08]0.9(TiO2)0.1

Colomer¹,

Jurado²

2002

Journal of Solid State Chemistry

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“…[ 199 ] The solubility of Fe 2 O 3 in ZrO 2 is about 4 at.%. [ 200 ] 20 at.% Fe 2 O 3 could be dissolved into zirconia, but zirconia with such high Fe 2 O 3 content are not stable after fi red at 800 ° C. [ 201 ] The solubility of MnO x in ZrO 2 was found to be 12 at.%, although high solubility up to 30 at.% had been reported. [ 202 ] The solubility of NiO in YSZ is only about 2 at.% at 1600 ° C. [ [ 209 , 210 ] The thermal expansion coeffi cient (TEC) of reduced TiO 2 -NbO 2 and Ti 1−2 x Cr x Nb x O 2 were 2.3 × 10 − 6 and 5.6-8.6 × 10 − 6 K − 1 , respectively, which is only a quarter to half of that of YSZ.…”

Section: Zirconia-based Fluoritementioning

confidence: 99%

Solid Oxide Fuel Cell Anode Materials for Direct Hydrocarbon Utilization

Chan

Liu

et al. 2012

Advanced Energy Materials

276

159

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Solid oxide fuel cells (SOFC) are highly efficient energy conversion devices with the advantage of directly utilizing hydrocarbon fuels. Starting with a short introduction about the fuel challenges and early achievements in this field, this review paper focuses on advances in oxygen‐ion conducting electrolyte‐based SOFC during the last 15 years. Robust anodes immune to carbon deposition are a prerequisite for direct hydrocarbon SOFC. In this paper, direct hydrocarbon SOFC anode materials are classified into three general categories: Ni‐cermet, Cu‐cermet, and oxide‐based anodes. Oxide anodes are further classified in terms of their crystalline structures, namely fluorite, rutile, tungsten bronze, pyrochlore, perovskite, and double perovskite. Achievements and recent advances on these SOFC anodes are reviewed and discussed. The concluding remarks summarize the pros and cons of direct hydrocarbon SOFC anode materials along with the perspective of future research trends.

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“…6-8. Usually, the arcs at high frequencies characterize the contact and electrolyte impedances whereas these at low frequencies are related to the electrode polarization impedances [9][10][11]. We assumed that in the limited range of low frequencies (below 20-1000 Hz ), the latter arc can be modeled by the response of a simplified equivalent circuit R s (R e Q), where R s is the contact and ohmic resistance of the electrolyte, R e is the electrode polarization resistance and Q is the constant phase element, whose impedance is defined as…”

Section: Impedances Of the Quasi-point Electrodesmentioning

confidence: 99%

Investigation of the Partial Oxidation of Methane at the Interface Metal (Pt, Au)|YSZ

et al. 2005

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The reactions occurring at the electrodes of Pt|YSZ|Au cell fed with a mixture of CH 4 +air were investigated at 600-850 • C. The electrodes of this cell were made from Pt and Au wires, providing a small contact area between metal and YSZ (quasi-point electrodes). The dependences of the cell voltage on the composition of gas mixture and time were studied. A sequence of chemical and electrochemical reactions was proposed to explain the observed abrupt variation of the cell voltage from positive to negative values. Also the impedances of the Pt and Au electrodes were measured and analysed in order to justify the proposed mechanism of reactions.

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Impedance spectroscopy on YSZ with iron oxide as additive

Cited by 22 publications

References 3 publications

Structure, Microstructure, and Mixed Conduction of [(ZrO2)0.92(Y2O3)0.08]0.9(TiO2)0.1

Structure, Microstructure, and Mixed Conduction of [(ZrO2)0.92(Y2O3)0.08]0.9(TiO2)0.1

Solid Oxide Fuel Cell Anode Materials for Direct Hydrocarbon Utilization

Investigation of the Partial Oxidation of Methane at the Interface Metal (Pt, Au)|YSZ

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