Interlayer modification for high-performance and stable solid oxide electrolysis cell

Riyan A. Budiman; Toshiaki Yamaguchi; Tomohiro Ishiyama; Katherine Develos-Bagarinao; Katsuhiko Yamaji; Haruo Kishimoto

doi:10.1016/j.matlet.2021.131419

Interlayer modification for high-performance and stable solid oxide electrolysis cell

Riyan A. Budiman, Toshiaki Yamaguchi, Tomohiro Ishiyama, Katherine Develos-Bagarinao, Katsuhiko Yamaji, Haruo Kishimoto

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Solid oxide electrolysis cells (SOECs) are an attractive technology that can convert energy into hydrogen or other syngas due to their high energy-conversion efficiency. To improve both performance and stability of SOECs, the effect of the interlayer modification between La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ (LSCF) air electrode and ytrria-stabilized zirconia (YSZ) electrolyte on the high-temperature water electrolysis performance was studied using electrochemical impedance spectroscopy at 1023 K under 40% H₂O– 60% H₂ fuel flow. Enhancement of the current density from 0.9 A/cm² to 1.25 A/cm² was achieved by replacing the porous Ce_0.9Gd_0.1O_1.95 (GDC) interlayer by a dense GDC interlayer. Detailed analysis of the impedance spectra of the cell indicated that utilizing the dense GDC interlayer leads to a significant decrease of the ohmic resistance. Scanning electron microscopy-wavelength dispersive X-ray spectroscopy results show that the dense GDC interlayer could significantly reduce the secondary phase formation of SrZrO₃ between the GDC and YSZ interface. Thus, the enhancement of the SOEC current density was also accompanied by good stability of the cell as confirmed over 50 h at 1023 K.

Original language	English
Article number	131419
Journal	Materials Letters
Volume	309
DOIs	https://doi.org/10.1016/j.matlet.2021.131419
Publication status	Published - 2022 Feb 15
Externally published	Yes

Keywords

Current density
GDC interlayer
GDC porosity
Secondary phase formation

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2021.131419

Cite this

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title = "Interlayer modification for high-performance and stable solid oxide electrolysis cell",

abstract = "Solid oxide electrolysis cells (SOECs) are an attractive technology that can convert energy into hydrogen or other syngas due to their high energy-conversion efficiency. To improve both performance and stability of SOECs, the effect of the interlayer modification between La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) air electrode and ytrria-stabilized zirconia (YSZ) electrolyte on the high-temperature water electrolysis performance was studied using electrochemical impedance spectroscopy at 1023 K under 40% H2O– 60% H2 fuel flow. Enhancement of the current density from 0.9 A/cm2 to 1.25 A/cm2 was achieved by replacing the porous Ce0.9Gd0.1O1.95 (GDC) interlayer by a dense GDC interlayer. Detailed analysis of the impedance spectra of the cell indicated that utilizing the dense GDC interlayer leads to a significant decrease of the ohmic resistance. Scanning electron microscopy-wavelength dispersive X-ray spectroscopy results show that the dense GDC interlayer could significantly reduce the secondary phase formation of SrZrO3 between the GDC and YSZ interface. Thus, the enhancement of the SOEC current density was also accompanied by good stability of the cell as confirmed over 50 h at 1023 K.",

keywords = "Current density, GDC interlayer, GDC porosity, Secondary phase formation",

author = "Budiman, {Riyan A.} and Toshiaki Yamaguchi and Tomohiro Ishiyama and Katherine Develos-Bagarinao and Katsuhiko Yamaji and Haruo Kishimoto",

note = "Funding Information: This study was supported by New Energy and Industrial Technology Development (NEDO), Japan. Publisher Copyright: {\textcopyright} 2021",

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T1 - Interlayer modification for high-performance and stable solid oxide electrolysis cell

AU - Budiman, Riyan A.

AU - Yamaguchi, Toshiaki

AU - Ishiyama, Tomohiro

AU - Develos-Bagarinao, Katherine

AU - Yamaji, Katsuhiko

AU - Kishimoto, Haruo

PY - 2022/2/15

Y1 - 2022/2/15

N2 - Solid oxide electrolysis cells (SOECs) are an attractive technology that can convert energy into hydrogen or other syngas due to their high energy-conversion efficiency. To improve both performance and stability of SOECs, the effect of the interlayer modification between La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) air electrode and ytrria-stabilized zirconia (YSZ) electrolyte on the high-temperature water electrolysis performance was studied using electrochemical impedance spectroscopy at 1023 K under 40% H2O– 60% H2 fuel flow. Enhancement of the current density from 0.9 A/cm2 to 1.25 A/cm2 was achieved by replacing the porous Ce0.9Gd0.1O1.95 (GDC) interlayer by a dense GDC interlayer. Detailed analysis of the impedance spectra of the cell indicated that utilizing the dense GDC interlayer leads to a significant decrease of the ohmic resistance. Scanning electron microscopy-wavelength dispersive X-ray spectroscopy results show that the dense GDC interlayer could significantly reduce the secondary phase formation of SrZrO3 between the GDC and YSZ interface. Thus, the enhancement of the SOEC current density was also accompanied by good stability of the cell as confirmed over 50 h at 1023 K.

AB - Solid oxide electrolysis cells (SOECs) are an attractive technology that can convert energy into hydrogen or other syngas due to their high energy-conversion efficiency. To improve both performance and stability of SOECs, the effect of the interlayer modification between La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) air electrode and ytrria-stabilized zirconia (YSZ) electrolyte on the high-temperature water electrolysis performance was studied using electrochemical impedance spectroscopy at 1023 K under 40% H2O– 60% H2 fuel flow. Enhancement of the current density from 0.9 A/cm2 to 1.25 A/cm2 was achieved by replacing the porous Ce0.9Gd0.1O1.95 (GDC) interlayer by a dense GDC interlayer. Detailed analysis of the impedance spectra of the cell indicated that utilizing the dense GDC interlayer leads to a significant decrease of the ohmic resistance. Scanning electron microscopy-wavelength dispersive X-ray spectroscopy results show that the dense GDC interlayer could significantly reduce the secondary phase formation of SrZrO3 between the GDC and YSZ interface. Thus, the enhancement of the SOEC current density was also accompanied by good stability of the cell as confirmed over 50 h at 1023 K.

KW - Current density

KW - GDC interlayer

KW - GDC porosity

KW - Secondary phase formation

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Interlayer modification for high-performance and stable solid oxide electrolysis cell

Abstract

Keywords

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