Performance Measurements of Solid-Oxide Electrolysis Cells for Hydrogen Production

An experimental study has been completed to assess the performance of single solid-oxide electrolysis cells operating over a temperature range of 800 to 900°C. The experiments were performed over a range of steam inlet partial pressures (2.3–12.2 kPa), carrier gas flow rates (50–200 sccm), and current densities (−0.75–0.25A∕cm2) using single electrolyte-supported button cells of scandia-stabilized zirconia. Steam consumption rates associated with electrolysis were measured directly using inlet and outlet dew-point instrumentation. Cell operating potentials and cell current were varied using a programmable power supply and monitored continuously. Values of area-specific resistance and thermal efficiency are presented as a function of current density. Cell performance is shown to be continuous from the fuel-cell mode to the electrolysis mode of operation. The effects of steam starvation and thermal cycling on cell performance parameters are discussed.

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Performance Measurements of Solid-Oxide Electrolysis Cells for Hydrogen Production From Nuclear Energy

12th International Conference on Nuclear Engineering, Volume 1 ◽

10.1115/icone12-49479 ◽

2004 ◽

Cited By ~ 4

Author(s):

J. E. O’Brien ◽

C. M. Stoots ◽

J. S. Herring ◽

P. A. Lessing ◽

J. J. Hartvigsen ◽

...

Keyword(s):

Gas Flow ◽

Solid Oxide ◽

Cell Performance ◽

Performance Measurements ◽

Partial Pressures ◽

Electrolysis Cells ◽

Solid Oxide Electrolysis ◽

Consumption Rates ◽

Cell Current ◽

Solid Oxide Electrolysis Cells

An experimental study has been completed to assess the performance of single solid-oxide electrolysis cells operating over a temperature range of 800 to 900°C. The experiments were performed over a range of steam inlet partial pressures (2.3–12.2 kPa), carrier gas flow rates (50–200 sccm), and current densities (−0.75 to 0.25 A/cm2) using single electrolyte-supported button cells of scandia-stabilized zirconia. Steam consumption rates associated with electrolysis were measured directly using inlet and outlet dewpoint instrumentation. Cell operating potentials and cell current were varied using a programmable power supply and monitored continuously. Values of area-specific resistance and thermal efficiency are presented as a function of current density. Cell performance is shown to be continuous from the fuel-cell mode to the electrolysis mode of operation. The effects of steam starvation and thermal cycling on cell performance parameters are discussed.

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Performance Characterization of Solid-Oxide Electrolysis Cells for Hydrogen Production

2nd International Conference on Fuel Cell Science, Engineering and Technology ◽

10.1115/fuelcell2004-2474 ◽

2004 ◽

Cited By ~ 5

Author(s):

J. E. O’Brien ◽

C. M. Stoots ◽

J. S. Herring ◽

P. A. Lessing

Keyword(s):

Fuel Cell ◽

Hydrogen Production ◽

Gas Flow ◽

Solid Oxide ◽

Cell Performance ◽

Production Performance ◽

Electrolysis Cells ◽

Solid Oxide Electrolysis ◽

Solid Oxide Electrolysis Cells

An experimental study has been completed to assess the hydrogen-production performance of single solid-oxide electrolysis cells operating over a temperature range of 800 to 900°C. The experiments were performed over a range of steam inlet partial pressures (2.3 – 12.2 kPa), carrier gas flow rates (50–200 sccm), and current densities (−0.75 to 0.25 A/cm2) using single electrolyte-supported button cells of scandia-stabilized zirconia. Steam consumption rates associated with electrolysis were measured directly using inlet and outlet dewpoint instrumentation. Cell operating potentials and cell current were varied using a programmable power supply. Values of area-specific resistance and hydrogen production rate are presented as a function of current density. Cell performance is shown to be continuous from the fuel-cell mode to the electrolysis mode of operation. The effects of steam starvation and thermal cycling on cell performance parameters are discussed. Laboratory capabilities are currently being expanded to allow for testing and characterization of multiple-cell electrolysis stacks. Some fundamental differences between the fuel-cell and electrolysis modes of operation have been summarized.

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A novel fuel electrode enabling direct CO2 electrolysis with excellent and stable cell performance

Journal of Materials Chemistry A ◽

10.1039/c7ta05750d ◽

2017 ◽

Vol 5 (39) ◽

pp. 20833-20842 ◽

Cited By ~ 46

Author(s):

Yihang Li ◽

Bobing Hu ◽

Changrong Xia ◽

Wayne Q. Xu ◽

John P. Lemmon ◽

...

Keyword(s):

Building Blocks ◽

Solid Oxide ◽

Cell Performance ◽

Chemical Production ◽

Electrolysis Cells ◽

Solid Oxide Electrolysis ◽

Solid Oxide Electrolysis Cells ◽

Co2 Electrolysis

Solid oxide electrolysis cells (SOECs) can directly convert CO2 to CO and O2 that are important building blocks for chemical production and other applications.

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Hydrogen Production Performance of a 10-Cell Planar Solid-Oxide Electrolysis Stack

3rd International Conference on Fuel Cell Science, Engineering and Technology ◽

10.1115/fuelcell2005-74168 ◽

2005 ◽

Cited By ~ 1

Author(s):

J. E. O’Brien ◽

C. M. Stoots ◽

J. S. Herring ◽

J. Hartvigsen

Keyword(s):

Hydrogen Production ◽

Gas Flow ◽

Solid Oxide ◽

Production Performance ◽

Electrolysis Cells ◽

Consumption Rates ◽

Cell Current ◽

Current Densities ◽

Metallic Interconnect ◽

Electrolysis Mode

An experimental study is under way to assess the performance of solid-oxide cells operating in the steam electrolysis mode for hydrogen production over a temperature range of 800 to 900°C. Results presented in this paper were obtained from a ten-cell planar electrolysis stack, with an active area of 64 cm2 per cell. The electrolysis cells are electrolyte-supported, with scandia-stabilized zirconia electrolytes (∼140 μm thick), nickel-cermet steam/hydrogen electrodes, and manganite air-side electrodes. The metallic interconnect plates are fabricated from ferritic stainless steel. The experiments were performed over a range of steam inlet mole fractions (0.1–0.6), gas flow rates (1000–4000 sccm), and current densities (0 to 0.38 A/cm2). Steam consumption rates associated with electrolysis were measured directly using inlet and outlet dewpoint instrumentation. Cell operating potentials and cell current were varied using a programmable power supply. Hydrogen production rates up to 100 Normal liters per hour were demonstrated. Values of area-specific resistance and stack internal temperatures are presented as a function of current density. Stack performance is shown to be dependent on inlet steam flow rate.

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Hydrogen Production Performance of a 10-Cell Planar Solid-Oxide Electrolysis Stack

Journal of Fuel Cell Science and Technology ◽

10.1115/1.2179435 ◽

2005 ◽

Vol 3 (2) ◽

pp. 213-219 ◽

Cited By ~ 68

Author(s):

J. E. O’Brien ◽

C. M. Stoots ◽

J. S. Herring ◽

J. Hartvigsen

Keyword(s):

Hydrogen Production ◽

Gas Flow ◽

Solid Oxide ◽

Production Performance ◽

Electrolysis Cells ◽

Consumption Rates ◽

Cell Current ◽

Current Densities ◽

Metallic Interconnect ◽

Electrolysis Mode

An experimental study is under way to assess the performance of solid-oxide cells operating in the steam electrolysis mode for hydrogen production over a temperature range of 800-900°C. Results presented in this paper were obtained from a ten-cell planar electrolysis stack, with an active area of 64cm2 per cell. The electrolysis cells are electrolyte supported, with scandia-stabilized zirconia electrolytes (∼140μm thick), nickel-cermet steam/hydrogen electrodes, and manganite air-side electrodes. The metallic interconnect plates are fabricated from ferritic stainless steel. The experiments were performed over a range of steam inlet mole fractions (0.1–0.6), gas flow rates (1000-4000sccm), and current densities (0-0.38A∕cm2). Steam consumption rates associated with electrolysis were measured directly using inlet and outlet dewpoint instrumentation. Cell operating potentials and cell current were varied using a programmable power supply. Hydrogen production rates up to 100Nl∕h were demonstrated. Values of area-specific resistance and stack internal temperatures are presented as a function of current density. Stack performance is shown to be dependent on inlet steam flow rate.

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