Oxygen pumping based on c-axis-oriented lanthanum silicate ceramics

Challenge toward low operating temperature

Ken Watanabe, Shingo Ide, Takashi Kumagai, Takaaki Fujino, Koichi Suematsu, Kengo Shimanoe

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

A new electrochemical oxygen separation pump was developed by using c-axis-oriented La 9.66 Si 5.3 B 0.7 O 26.14 (c-LSBO), which has high oxide-ionic conductivity (>10 13 S cm 11 ) up to 300°C. Interfacial resistance between the electrode and c-LSBO was investigated to realize the full potential of LSBO as an oxygen separation material. The formation of a Sm-doped CeO 2 (SDC) thin film (thickness: 300 nm) between the electrode and c-LSBO was effective for suppressing the interfacial resistance. Furthermore, a mixed conductive La 0.6 Sr 0.4 Co 0.78 Ni 0.02 Fe 0.2 O 3 1 ¤ (LSCFN) was applied to the electrode for enhancing the oxygen reduction/evolution activity on the electrode. The LSCFN/SDC/c-LSBO symmetric cell showed an oxygen permeation flux of 3.5 mL cm 12 min 11 (1.0 A cm 12 ) at 600°C under an applied DC voltage of 1.5 V; this value was 67 times that of Pt/c-LSBO. This oxygen pump based on the LSCFN/SDC/c-LSBO symmetric cell would find promising application in oxygen separation at intermediate temperatures. Further reduction of the interfacial resistance and polarization resistance of the electrode may decrease the operating temperatures to below 400°C.

元の言語英語
ページ(範囲)1-4
ページ数4
ジャーナルJournal of the Ceramic Society of Japan
DOI
出版物ステータス出版済み - 1 1 2019

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Lanthanum
Silicates
operating temperature
lanthanum
silicates
pumping
ceramics
Oxygen
oxygen
Electrodes
electrodes
Temperature
Pumps
pumps
Ionic conductivity
cells
Permeation
Oxides
ion currents
Film thickness

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

これを引用

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title = "Oxygen pumping based on c-axis-oriented lanthanum silicate ceramics: Challenge toward low operating temperature",
abstract = "A new electrochemical oxygen separation pump was developed by using c-axis-oriented La 9.66 Si 5.3 B 0.7 O 26.14 (c-LSBO), which has high oxide-ionic conductivity (>10 13 S cm 11 ) up to 300°C. Interfacial resistance between the electrode and c-LSBO was investigated to realize the full potential of LSBO as an oxygen separation material. The formation of a Sm-doped CeO 2 (SDC) thin film (thickness: 300 nm) between the electrode and c-LSBO was effective for suppressing the interfacial resistance. Furthermore, a mixed conductive La 0.6 Sr 0.4 Co 0.78 Ni 0.02 Fe 0.2 O 3 1 ¤ (LSCFN) was applied to the electrode for enhancing the oxygen reduction/evolution activity on the electrode. The LSCFN/SDC/c-LSBO symmetric cell showed an oxygen permeation flux of 3.5 mL cm 12 min 11 (1.0 A cm 12 ) at 600°C under an applied DC voltage of 1.5 V; this value was 67 times that of Pt/c-LSBO. This oxygen pump based on the LSCFN/SDC/c-LSBO symmetric cell would find promising application in oxygen separation at intermediate temperatures. Further reduction of the interfacial resistance and polarization resistance of the electrode may decrease the operating temperatures to below 400°C.",
author = "Ken Watanabe and Shingo Ide and Takashi Kumagai and Takaaki Fujino and Koichi Suematsu and Kengo Shimanoe",
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T1 - Oxygen pumping based on c-axis-oriented lanthanum silicate ceramics

T2 - Challenge toward low operating temperature

AU - Watanabe, Ken

AU - Ide, Shingo

AU - Kumagai, Takashi

AU - Fujino, Takaaki

AU - Suematsu, Koichi

AU - Shimanoe, Kengo

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AB - A new electrochemical oxygen separation pump was developed by using c-axis-oriented La 9.66 Si 5.3 B 0.7 O 26.14 (c-LSBO), which has high oxide-ionic conductivity (>10 13 S cm 11 ) up to 300°C. Interfacial resistance between the electrode and c-LSBO was investigated to realize the full potential of LSBO as an oxygen separation material. The formation of a Sm-doped CeO 2 (SDC) thin film (thickness: 300 nm) between the electrode and c-LSBO was effective for suppressing the interfacial resistance. Furthermore, a mixed conductive La 0.6 Sr 0.4 Co 0.78 Ni 0.02 Fe 0.2 O 3 1 ¤ (LSCFN) was applied to the electrode for enhancing the oxygen reduction/evolution activity on the electrode. The LSCFN/SDC/c-LSBO symmetric cell showed an oxygen permeation flux of 3.5 mL cm 12 min 11 (1.0 A cm 12 ) at 600°C under an applied DC voltage of 1.5 V; this value was 67 times that of Pt/c-LSBO. This oxygen pump based on the LSCFN/SDC/c-LSBO symmetric cell would find promising application in oxygen separation at intermediate temperatures. Further reduction of the interfacial resistance and polarization resistance of the electrode may decrease the operating temperatures to below 400°C.

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