US 12,098,467 B2
Hydrogen gas production systems and related electrolysis cells
Ting He, Idaho Falls, ID (US); Dong Ding, Idaho Falls, ID (US); and Wei Wu, Idaho Falls, ID (US)
Assigned to Battelle Energy Alliance, LLC, Idaho Falls, ID (US)
Filed by Battelle Energy Alliance, LLC, Idaho Falls, ID (US)
Filed on Oct. 13, 2021, as Appl. No. 17/450,810.
Application 17/450,810 is a division of application No. 16/483,631, granted, now 11,198,941, previously published as PCT/US2018/016449, filed on Feb. 1, 2018.
Claims priority of provisional application 62/454,318, filed on Feb. 3, 2017.
Prior Publication US 2022/0081782 A1, Mar. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C25B 1/04 (2021.01); C25B 1/042 (2021.01); C25B 1/044 (2021.01); C25B 9/23 (2021.01); C25B 9/73 (2021.01); C25B 11/047 (2021.01); C25B 13/05 (2021.01); C25B 13/07 (2021.01); C25B 15/021 (2021.01)
CPC C25B 1/04 (2013.01) [C25B 1/042 (2021.01); C25B 1/044 (2021.01); C25B 9/23 (2021.01); C25B 9/73 (2021.01); C25B 11/047 (2021.01); C25B 13/05 (2021.01); C25B 13/07 (2021.01); C25B 15/021 (2021.01)] 17 Claims
OG exemplary drawing
 
1. A hydrogen gas production system, comprising:
a source of liquid water;
a steam generator configured and positioned to receive a liquid water stream from the source of liquid water and to generate a gaseous water stream therefrom; and
an electrolysis apparatus in fluid communication with the steam generator, and comprising:
a housing structure configured and positioned to receive the gaseous water stream from the steam generator; and
an electrolysis cell within an internal chamber of the housing structure, and comprising:
a positive electrode comprising a M2NiO4−δ material, wherein M is La, Pr, Gd or Sm, a composite material comprising Sm1-xSrxCoO3−δ and BZCYYb, or any combination thereof;
a negative electrode; and
a proton-conducting membrane between the positive electrode and the negative electrode and comprising an electrolyte material having an ionic conductivity greater than or equal to about 10−2 S/cm at one or more temperatures within a range of from about 150° ° C. to about 650° C., the electrolyte material comprising yttrium- and ytterbium-doped barium-zirconate-cerate (BZCYYb) of the composition BaZr0.8-yCeyY0.2-xYbxO3−δ, yttrium- and ytterbium-doped barium-strontium-niobate (BSNYYb) of the composition Ba3(Sr1-xNb2-yYxYby)O9−δ, or any combination thereof,
wherein x and y are dopant levels and δ is oxygen deficit.