• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

反応性添加物を用いたSOFC空気極のガラス質不純物への耐性の向上に関する研究

Research Project

Project/Area Number 26820297
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Inorganic materials/Physical properties
Research InstitutionKyushu University

Principal Investigator

BISHOP Sean  九州大学, カーボンニュートラル・エネルギー国際研究所, 助教 (30618822)

Project Period (FY) 2014-04-01 – 2015-03-31
Project Status Discontinued (Fiscal Year 2014)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsSolid oxide fuel cell / electrode / impurity / durability
Outline of Annual Research Achievements

Fast oxygen exchange kinetics, a key figure of merit in solid oxide fuel cell (SOFC) electrodes, is often dramatically hindered by the presence of even small concentrations of impurities. Si, for example, is common in ceramics processing. It was found that rapid degradation of oxygen exchange kinetics occurred on dense thin films of Pr0.1Ce0.9O2-d (PCO), a mixed ionic electronic conducting electrode for SOFCs. A new optical transmission relaxation (OTR) technique was developed to aid in measuring kinetics on the bare film surfaces. A key advantage of this technique is that it does not require current collectors typical of conventional measurements. Si was identified by TEM and XPS as a significant surface impurity, which forms a blocking layer on the electrode surface. Deposition of a La oxide film was found to result in full recovery of oxygen exchange kinetics on the measured sample. La and Si oxides were found to interact with each other as identified by a shift in the O1s XPS peak and a systematic OTR study of films that likely react with Si (e.g. La, Sm oxides) and those that do not (e.g. Nb, Ti, Zn oxides). These results indicate that La may "clean" the surface of the SOFC electrode, thereby dramatically improving oxygen transport kinetics. Preliminary measurements of OTR on a La-PCO solid solution indicates improved long-term electrode kinetics stability, demonstrating the commercial potential of this method to achieve Si impurity tolerance.

Report

(1 results)
  • 2014 Annual Research Report
  • Research Products

    (6 results)

All 2014 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Invited: 2 results) Remarks (1 results)

  • [Journal Article] Greatly improved Si impurity tolerance of SOFC electrodes identified through in situ optical transmission relaxation (OTR)2014

    • Author(s)
      Liang Zhao, Nicola H. Perry, Takeshi Daio, Kazunari Sasaki, Sean R. Bishop
    • Journal Title

      Advanced Energy Materials (Submitted)

      Volume: N/A

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Presentation] Oxygen exchange kinetics on Pr-CeO2 cathode material measured by optical transmission relaxation (OTR)2014

    • Author(s)
      L. Zhao, N. H. Perry, T. Daio, K. Sasaki, S. R. Bishop
    • Organizer
      IUMRS-ICA
    • Place of Presentation
      Fukuoka, Japan
    • Year and Date
      2014-08-24 – 2014-08-30
    • Related Report
      2014 Annual Research Report
  • [Presentation] Oxygen exchange kinetics of thin films studied by optical transmission relaxation: correlation with surface composition and microstructure2014

    • Author(s)
      S. R. Bishop, L. Zhao, T. Daio, N. H. Perry, and K. Sasaki
    • Organizer
      Microscopy and Microanalysis 2014 Meeting
    • Place of Presentation
      Hartford, CT, USA
    • Year and Date
      2014-08-06
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Oxygen exchange kinetics on Pr-CeO2 cathode material measured by optical transmission relaxation (OTR)2014

    • Author(s)
      L. Zhao, N. H. Perry, T. Daio, K. Sasaki, S. R. Bishop
    • Organizer
      Gordon Research Conference
    • Place of Presentation
      Mt. Holyoke College, MA, USA
    • Year and Date
      2014-07-20 – 2014-07-25
    • Related Report
      2014 Annual Research Report
  • [Presentation] Oxygen exchange kinetics of thin films studied by optical absorption relaxation2014

    • Author(s)
      S. R. Bishop, L. Zhao, N. H. Perry, and K. Sasaki
    • Organizer
      Materials Research Society (MRS) 2014
    • Place of Presentation
      San Francisco, CA, USA
    • Year and Date
      2014-04-21 – 2014-04-25
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Remarks] Bishop Research Group

    • URL

      http://i2cner.kyushu-u.ac.jp/~bishop/

    • Related Report
      2014 Annual Research Report

URL: 

Published: 2014-04-04   Modified: 2016-06-01  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi