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Mogensen, Mogens Bjerg; Primdahl, S.; Jørgensen, Mette; Bagger, C.

doi:10.1023/a:1009910202330

Cited by 110 publications

(88 citation statements)

References 37 publications

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“…[15][16][17][18][19] The cells with a CGO barrier layer have a much lower activity. The high frequency arc in the impedance plot is, according to literature, due to the transfer of oxygen intermediates/oxide ions between the LSM cathode and the YSZ electrolyte and through the YSZ of the composite.…”

Section: Discussionmentioning

confidence: 99%

The Effect of a CGO Barrier Layer on the Performance of LSM/YSZ SOFC Cathodes

Menon

Knudsen

Bonanos

et al. 2010

J. Electrochem. Soc.

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Strontium-substituted lanthanum manganite/yttria-stabilized zirconia (LSM/YSZ) solid oxide fuel cell (SOFC) composite electrodes were fabricated with slurry spraying on both sides on either pure YSZ electrolyte foils or YSZ electrolyte foils with a cerium–gadolinium oxide (CGO) barrier layer made by spin coating. Electrochemical impedance spectroscopy was used to evaluate the performance of the LSM/YSZ composite electrodes. It was shown that the CGO barrier layer affects both the performance of the LSM/YSZ composite electrodes and the series resistance of the cells. This indicates that the cathode–electrolyte interface and the barrier layer–electrolyte interface have a large influence on the performance of LSM/YSZ composite electrodes.

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Section: Discussionmentioning

confidence: 99%

The Effect of a CGO Barrier Layer on the Performance of LSM/YSZ SOFC Cathodes

Menon

Knudsen

Bonanos

et al. 2010

J. Electrochem. Soc.

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“…The performance of LSM-YSZ composite electrodes is, therefore, highly dependent on the local structure and composition at the interface, which can be a function of the synthesis and operating conditions. [1][2][3][4][5][6][7][8][9] An important example of this is the observation that the area specific resistance ͑ASR͒ of LSM-YSZ electrodes often decreases dramatically when they are cathodically polarized. 5,[10][11][12][13][14] This phenomenon, which is referred to as activation polarization, is reversible upon anodic polarization 12,14 or annealing in air at open circuit.…”

mentioning

confidence: 99%

Substrate-Mediated Spreading and Phase Segregation at LSM-Zirconia Interfaces

Kim

Lee

Gorte

et al. 2011

J. Electrochem. Soc.

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Atomic force microscopy and electron microscopy with energy dispersive X-ray analysis was used to characterize changes in the structure and composition of La 0.8 Sr 0.2 MnO 3 ͑LSM͒ nanoparticles supported on single crystal YSZ͑100͒ ͑yttria-stabilized zirconia͒ and SrTiO 3 ͑100͒ surfaces as a function of temperature and exposure to oxidizing and reducing environments. On YSZ͑100͒, LSM particles were found to decompose into Mn-and La-rich phases and spread over the surface upon calcination in air at temperatures above 1123 K. The Mn-rich phase was observed to have a higher mobility and spread more rapidly. In contrast to YSZ͑100͒, on SrTiO 3 ͑100͒ the LSM particles underwent agglomeration via an Ostwald ripening mechanism upon calcination at temperatures above 1123 K, resulting in an increase in the particle size. Phase separation was not observed on this substrate.

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“…The addition of YSZ into the La 1-a Ca a Cr 1-b Ti b O 3-d matrix could prove to be an interesting approach. This is because composite materials have been identified as having the potential to improve electrode behaviour through an increase in the area of the three-phase-boundary (tpb) [6,7] powders were prepared from polymeric precursors. The cerium nitrate and manganese (cobalt) nitrate solutions were mixed with ethylene glycol, in the required proportions, and then heated on a thermal plate for several hours with magnetic stirring.…”

Section: Introductionmentioning

confidence: 99%

Performance of Alternative Oxide Anodes for the Electrochemical Oxidation of Hydrogen and Methane in Solid Oxide Fuel Cells

Apfel

Stimming

2006

Fuel Cells

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The electrode performances of the alternative oxides: La0.05Ca0.95Cr0.05Ti0.95O3‐δ‐8YSZ and Ce0.8TM0.2O2‐δ(TM=Mn, Co) for the direct electrochemical oxidation of methane are investigated to assess their potential as anode materials for efficient methane conversion in a SOFC. The electrochemical oxidation of hydrogen was also studied, for comparison. The oxides are characterised electrochemically with impedance spectroscopy in the frequency range from 10 mHz to 1MHz, using a three‐electrode geometry. They are compared to a standard Ni/8YSZ anode for the electrochemical oxidation of hydrogen. It is found that La0.05Ca0.95Cr0.05Ti0.95O3‐δ‐8YSZ demonstrates a poor electrochemical activity in both hydrogen and methane. However, the electrochemical activity of Ce0.8Mn0.2O2‐δ is promising, but the electronic conductivity needs to be increased, e.g., by adding a conducting oxide, before it can be used as an anode material in a SOFC.

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Untitled

Cited by 110 publications

References 37 publications

The Effect of a CGO Barrier Layer on the Performance of LSM/YSZ SOFC Cathodes

The Effect of a CGO Barrier Layer on the Performance of LSM/YSZ SOFC Cathodes

Substrate-Mediated Spreading and Phase Segregation at LSM-Zirconia Interfaces

Performance of Alternative Oxide Anodes for the Electrochemical Oxidation of Hydrogen and Methane in Solid Oxide Fuel Cells

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