Performance Measurements of Solid-Oxide Electrolysis Cells for Hydrogen Production

O’Brien, James E.; Stoots, C. M.; Herring, J. Stephen; Lessing, Paul A.; Hartvigsen, J. J.; Elangovan, S.

doi:10.1115/1.1895946

Cited by 80 publications

(30 citation statements)

References 3 publications

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“…The upper curve in the figure shows the decrease in electrolysis efficiency that occurs as the per-cell operating voltage is increased above the open-cell voltage, V N , according to Eqn. (22). Operation at the thermal-neutral voltage yields an electrolysis efficiency of 1.0.…”

Section: Thermodynamics Of High Temperature Electrolysismentioning

confidence: 99%

“…Results of initial single (button) cell HTE tests completed at the INL were documented in detail in reference [22]. Button cell tests are useful for basic performance characterization of electrode and electrolyte materials and of different cell designs (e.g., electrode-supported, integrated planar, tubular).…”

Section: Inl Hte Experimental Program 31 Small-scale Testsmentioning

confidence: 99%

“…(22). A fuel utilization factor is often included in the fuel-cell efficiency definition, but it is not needed in the electrolysis definition since no fuel (only steam) is wasted at low utilization.…”

Section: Thermodynamics Of High Temperature Electrolysismentioning

confidence: 99%

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High Temperature Electrolysis for Hydrogen Production from Nuclear Energy ? TechnologySummary

O’Brien¹,

Stoots²,

Herring³

et al. 2010

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The Department of Energy, Office of Nuclear Energy, has requested that a Hydrogen Technology Down-Selection be performed to identify the hydrogen production technology that has the best potential for timely commercial demonstration and for ultimate deployment with the Next Generation Nuclear Plant (NGNP). An Independent Review Team (IRT) has been assembled to execute the down-selection. This report has been prepared to provide the members of the Independent Review Team with detailed background information on the High Temperature Electrolysis (HTE) process, hardware, and state of the art. The Idaho National Laboratory has been serving as the lead lab for HTE research and development under the Nuclear Hydrogen Initiative. The INL HTE program has included small-scale experiments, detailed computational modeling, system modeling, and technology demonstration. Aspects of all of these activities are included in this report. In terms of technology demonstration, the INL successfully completed a 1000-hour test of the HTE Integrated Laboratory Scale (ILS) technology demonstration experiment during the fall of 2008. The HTE ILS achieved a hydrogen production rate in excess of 5.7 Nm 3 /hr, with a power consumption of 18 kW. This hydrogen production rate is far larger than has been demonstrated by any of the thermochemical or hybrid processes to date.This report was prepared in April-May 2009 specifically for the IRT, which at the end of its evaluation in July 2009, recommended that:DOE-NE should focus on the continued development of HTSE [High Temperature Steam Electrolysis] as the leading candidate for integration with NGNP in 2021. This conclusion is based upon the IRT judgment that HTSE has the highest probability of meeting the down-selection criteria described in the report, including efficient production of hydrogen at NGNP conditions.

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Section: Thermodynamics Of High Temperature Electrolysismentioning

confidence: 99%

Section: Inl Hte Experimental Program 31 Small-scale Testsmentioning

confidence: 99%

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High Temperature Electrolysis for Hydrogen Production from Nuclear Energy ? TechnologySummary

O’Brien¹,

Stoots²,

Herring³

et al. 2010

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“…17 In figure 3 we present the performance of the cell as a function of the concentration of steam introduced to the cathode side of the cell. As we increase the concentration of steam in the cathode, the 16 They observed values of area-specific resistance ranging from about 0.5 to 1.0 Ωcm 2 , depending on test conditions using single electrolyte-supported button cells of scandiastabilized zirconia (~175 µm thick). Note that these results were obtained at higher temperatures (800-900 ºC) using strontium-doped lanthanum manganite and the nickelzirconia cermet as electrodes.…”

Section: Characterization Of the 10sc1cesz Electrolytementioning

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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“…The area specific resistance (ASR) of the oxide scale has the units of cm 2 and is calculated using the following equation:…”

Section: Asr Measurementsmentioning

confidence: 99%

High Temperature Steam Electrolysis Materials Degradation: Preliminary Results of Corrosion Tests on Ceramatec Electrolysis Cell Components

Demkowicz¹,

Sachdev²,

DeWall³

et al. 2007

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Corrosion tests were performed on stainless steel and nickel alloy coupons in H 2 O/H 2 mixtures and dry air to simulate conditions experienced in high temperature steam electrolysis systems.The stainless steel coupons were tested bare and with one of three different proprietary coatings applied. Specimens were corroded at 850°C for 500 h with weight gain data recorded at periodic intervals. Post-test characterization of the samples included surface and cross-section scanning electron microscopy, grazing incidence x-ray diffraction, and area-specific resistance measurements. The uncoated nickel alloy outperformed the ferritic stainless steel under all test conditions based on weight gain data. Parabolic rate constants for corrosion of these two uncoated alloys were consistent with values presented in the literature under similar conditions. The steel coatings reduced corrosion rates in H 2 O/H 2 mixtures by as much as 50% compared to the untreated steel, but in most cases showed negligible corrosion improvement in air. The use of a rare-earth-based coating on stainless steel did not result in a significantly different area specific resistance values after corrosion compared to the untreated alloy. Characterization of the samples is still in progress and the findings will be revised when the complete data set is available.6

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Performance Measurements of Solid-Oxide Electrolysis Cells for Hydrogen Production

Cited by 80 publications

References 3 publications

High Temperature Electrolysis for Hydrogen Production from Nuclear Energy ? TechnologySummary

High Temperature Electrolysis for Hydrogen Production from Nuclear Energy ? TechnologySummary

Performance of solid oxide electrolysis cells based on scandia stabilised zirconia

High Temperature Steam Electrolysis Materials Degradation: Preliminary Results of Corrosion Tests on Ceramatec Electrolysis Cell Components

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