Reversibility and polarization behaviour of high temperature solid oxide electrochemical cells

Erdle, E.; Dönitz, W.; R, Schamm; Koch, Andreas

doi:10.1016/0360-3199(92)90026-s

Cited by 61 publications

(29 citation statements)

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“…We Ωcm 2 at 900 ºC 4 and 2.7 Ωcm 2 at 908 ºC, 18 but more work is required in order to approach to the best SOE based on YSZ cell found in the literature, with ASR = 0.27…”

Section: Electrolysis Characterization Of Ni-ysz/10sc1cesz/pt Single mentioning

confidence: 99%

Performance of solid oxide electrolysis cells based on scandia stabilised zirconia

Laguna‐Bercero

Skinner

Kilner

2009

Journal of Power Sources

118

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Zirconia doped with scandia and ceria (10Sc1CeSZ) is presented as an electrolyte in solid oxide electrolysis cells (SOECs) for hydrogen production at intermediate temperatures. At 700 ºC, the conductivity of the 10Sc1CeSZ is 0.057 Scm -1 and the ohmic resistance at OCV is 0.27 Ω.cm 2 . The electrolysis tests using Pt electrodes shows that the oxygen ion conduction in the electrolyte produces high current densities when operating as a SOEC. The performance of cells with Ni-YSZ (yttria stabilized zirconia) cathodes are also tested under external potential load at temperatures between 600 ºC and 900 ºC. These preliminary results demonstrate the suitability of 10Sc1CeSZ as an electrolyte for SOECs although further work is required to develop suitable electrodes.

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“…We Ωcm 2 at 900 ºC 4 and 2.7 Ωcm 2 at 908 ºC, 18 but more work is required in order to approach to the best SOE based on YSZ cell found in the literature, with ASR = 0.27…”

Section: Electrolysis Characterization Of Ni-ysz/10sc1cesz/pt Single mentioning

confidence: 99%

Performance of solid oxide electrolysis cells based on scandia stabilised zirconia

Laguna‐Bercero

Skinner

Kilner

2009

Journal of Power Sources

118

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“…There had been some studies on the high-temperature steam electrolysis in 80's [38][39][40][41][42], including system analysis and cell and stack development. To reduce the capital cost and increase electrical efficiency thus reduce the operation cost, specific hydrogen generation ability and cell performance have to be improved simultaneously because of the direct correlations between specific hydrogen generation and electrical energy demand (Figure 7-13).…”

Section: Technical Advancementmentioning

confidence: 99%

Final Technical Report, Oct 2004 - Nov. 2006, High Performance Flexible Reversible Solid Oxide Fuel Cell

Guan¹,

Minh²

2007

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This report summarizes the work performed for the program entitled "High Performance Flexible Reversible Solid Oxide Fuel Cell" under Cooperative Agreement DE-FC36-04GO14351 for the U. S. Department of Energy. The overall objective of this project is to demonstrate a single modular stack that generates electricity from a variety of fuels (hydrogen and other fuels such as biomass, distributed natural gas, etc.) and when operated in the reverse mode, produces hydrogen from steam. This project has evaluated and selected baseline cell materials, developed a set of materials for oxygen and hydrogen electrodes, and optimized electrode microstructures for reversible solid oxide fuel cells (RSOFCs); and demonstrated the feasibility and operation of a RSOFC multi-cell stack. A 10-cell reversible SOFC stack was operated over 1000 hours alternating between fuel cell (with hydrogen and methane as fuel) and steam electrolysis modes. The stack ran very successfully with high power density of 480 mW/cm 2 at 0.7V and 80% fuel utilization in fuel cell mode and >6 SLPM hydrogen production in steam electrolysis mode using about 1

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“…When the SOFCs are operated at high fuel utilization so that the reducing power drops, it is not entirely clear whether the same equations can be used for the activation overpotential. However, there are no overpotential equations available for high fuel utilization, and the SOFC voltage-current characteristic varies linearly and smoothly from the power generation mode to the high-temperature steam electrolysis mode [3,4]; hence, we assume that the reported activation overpotential [2] provides a good approximation. For the exhaust fuel at the high fuel utilization SOFC anode, we assume a CO 2 concentration of 99.5%, as obtained in the amino process [5].…”

Section: Arrangement Of High/low Fuel Utilization Sofcs and Calculatimentioning

confidence: 99%

Cycle analysis of low and high H₂ utilization SOFCs/gas turbine combined cycle for CO₂ recovery

Taniuchi¹,

Sunakawa²,

Nagahama³

et al. 2008

Elect Comm in Japan

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SUMMARYGlobal warming is mainly caused by CO 2 emission from thermal power plants, which burn fossil fuel with air. One of the countermeasure technologies to prevent global warming is CO 2 recovery from combustion flue gas and the sequestration of CO 2 underground or in the ocean. SOFC and other fuel cells can produce high-concentration CO 2 , because the reformed fuel gas reacts with oxygen electrochemically without being mixed with air, or diluted by N 2 . Thus, we propose to operate the multistage SOFCs under high utilization of reformed fuel for obtaining high-concentration CO 2 . In this report, we have estimated the multistage SOFCs' performance considering H 2 diffusion and the combined cycle efficiency of multistage SOFC/gas turbine/CO 2 recovery power plant. The power generation efficiency of our CO 2 recovery combined cycle is 68.5% and the efficiency of conventional SOFC/GT cycle is 57.8% including the CO 2 recovery amine process.

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Reversibility and polarization behaviour of high temperature solid oxide electrochemical cells

Cited by 61 publications

References 0 publications

Performance of solid oxide electrolysis cells based on scandia stabilised zirconia

Performance of solid oxide electrolysis cells based on scandia stabilised zirconia

Final Technical Report, Oct 2004 - Nov. 2006, High Performance Flexible Reversible Solid Oxide Fuel Cell

Cycle analysis of low and high H₂ utilization SOFCs/gas turbine combined cycle for CO₂ recovery

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Reversibility and polarization behaviour of high temperature solid oxide electrochemical cells

Cited by 61 publications

References 0 publications

Performance of solid oxide electrolysis cells based on scandia stabilised zirconia

Performance of solid oxide electrolysis cells based on scandia stabilised zirconia

Final Technical Report, Oct 2004 - Nov. 2006, High Performance Flexible Reversible Solid Oxide Fuel Cell

Cycle analysis of low and high H2 utilization SOFCs/gas turbine combined cycle for CO2 recovery

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Cycle analysis of low and high H₂ utilization SOFCs/gas turbine combined cycle for CO₂ recovery