Ultra High Resolution Depth Resolved Analysis on High Temperature Nano-ionics Phenomena to Development of High Active Fuel Cell Electrode

2012 Fiscal Year Final Research Report

• Project/Area Number: 22350007
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: Kyoto University
• Principal Investigator: UCHIMOTO Yoshiharu 京都大学, 大学院・人間・環境学研究科, 教授 (50193909)
• Co-Investigator(Kenkyū-buntansha): ORIKASA Yuki 京都大学, 大学院・人間・環境学研究科, 助教 (20589733)
• Project Period (FY): 2010 – 2012
• Keywords: 燃料電池 / 電極反応 / 固体イオニクス / X 線吸収 / その場分析

Research Abstract

For high temperature electrochemical devices, the cathode reaction mechanism for electrode or electrode/electrolyte are discussed. Especially, we discuss the rate-determining-step for the he perovskite-related oxides cathode/electrolyte. We investigated in situ depth resolved X-ray absorption spectroscopy (XAS) measurement for high temperature electrochemical devices component materials under the operating condition of high temperature electrochemical devices. The in situ XAS results clearly indicated that the rate-determining step is the reaction at electrode/electrolyte interface.

Research Products

• [Journal Article] X-ray Absorption Spectroscopic Study on La0.6Sr0.4CoO3-δCathode Materials Related with Oxygen Vacancy Formation (2011)
  • Author(s): Y. Orikasa, T. Ina, T. Nakao, A. Mineshige, K. Amezawa, M. Oishi, H. Arai, Z. Ogumi, Y. Uchimoto
  • Journal Title: J. Phys. Chem. C Volume: 115 Pages: 16433 - 16438
• [Journal Article] Local Structural Analysis for Oxide Ionic Transport in La0.6Sr0.4FeO3-δ Cathodes (2011)
  • Author(s): Y. Orikasa, T. Nakao, M. Oishi, T. Ina, A. Mineshige, K. Amezawa, H. Arai, Z. Ogumi, Y. Uchimoto
  • Journal Title: J. Mater. Chem Volume: 21 Pages: 14013 - 14019
• [Journal Article] X-ray Absorption Spectroscopic Study on Mixed Conductive La0.6Sr0.4Co0.8Fe0.2O3-dCathodes I. Electrical Conductivity and Electronic Structure (2011)
  • Author(s): Y. Orikasa, T. Ina, T. Nakao, A. Mineshige, K. Amezawa, M. Oishi, H. Arai, Z. Ogumi, Y. Uchimoto
  • Journal Title: Phys. Chem. Chem. Phys Volume: 13 Pages: 16637 - 16643
• [Presentation] Oxygen Chemical Potential Profile of SOFC Cathode by in-situ Depth Resolved XAS Measurement (2012)
  • Author(s): Toshiaki Ina, Takayuki Nakao, Yuki Orikasa, Hajime Tanida, Tomoya Uruga, Koji Amezawa, Atsushi Mineshige and Yoshiharu Uchimoto
  • Organizer: The 62th annual meeting of the international society of electrochemistry
  • Place of Presentation: Niigata, Japan
  • Year and Date: 2012-09-12
• [Presentation] 高温電解系における格子間酸素系カソード材料の点欠陥構造と反応活性 (2011)
  • Author(s): 伊奈稔哲、折笠有基、内本喜晴
  • Organizer: 第35回電解技術討論会
  • Place of Presentation: 同志社大学
  • Year and Date: 2011-11-15
• [Presentation] 深さ分解 XAFS法による高温系電気化学反応解析 (2011)
  • Author(s): 伊奈稔哲、 折笠有基、内本喜晴
  • Organizer: 第21回電極材料研究会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2011-07-29
• [Presentation] ペロブスカイト型酸化物 La0.6Sr0.4FeO3-d における酸素点欠陥が及ぼす局所構造変化と酸素空孔拡散 (2011)
  • Author(s): 伊奈稔哲、内本喜晴、折笠有基、大石昌嗣、荒井創、小久見善八、嶺重温、雨澤浩史
  • Organizer: 電気化学会 78回大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2011-03-29
• [Presentation] (La, Sr) (Co, Fe)O3 における局所構造変化と酸化物イオン拡散の関係 (2011)
  • Author(s): 伊奈稔哲、内本喜晴、折笠有基、大石昌嗣、荒井創、小久見善八、嶺重温、雨澤浩史
  • Organizer: 電気化学会 78回大会
  • Year and Date: 2011-03-29
• [Presentation] Rate Determining Step of SOFC Cathode Reaction Studied by in situ Electrochemical X-ray Absorption Spectroscopy (2010)
  • Author(s): Yoshiharu Uchimoto, Koji Amezawa, Yuki Orikasa and Tatsuya Kawada
  • Organizer: 2010 MRS Fall Meeting
  • Place of Presentation: Boston, MA, USA
  • Year and Date: 2010-11-30
• [Presentation] その場 X 線吸収分光法を用いた LSCF/YDC モデル電極における電極反応機構の解明 (2010)
  • Author(s): 中尾孝之、折笠有基、伊奈稔哲、嶺重温、雨澤浩史、川田達也、内本喜晴
  • Organizer: 第13回XAFS討論会
  • Place of Presentation: 立命館大学びわこくさつキャンパス
  • Year and Date: 2010-09-04
• [Presentation] Correlation Between Electrochemical Properties and Local and/or Oxygen Defect Structures of Ln2NiO4(Ln = La, Nd) (2010)
  • Author(s): Toshiaki Ina, Takayuki Nakao, Yuki Orikasa, Tomokazu Fukutsuka. Atsushi Mineshige, Koji Amezawa, Tatsuya Kawada and Yoshiharu Uchimoto
  • Organizer: 217th ECS Meeting
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 2010-04-29
• [Presentation] Rate Determining Step of High Temperature Cathode Reaction Studied by In Situ Electrochemical XAS (2010)
  • Author(s): Yuki Orikasa, Toshiaki Ina, Takayuki Nakao, Tomokazu Fukutsuka, Atsushi Mineshige, Koji Amezawa, Tatsuya Kawada and Yoshiharu Uchimoto
  • Organizer: 217th ECS Meeting
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 2010-04-28
• [Presentation] Electronic and Local Structure Analysis of the Electrolyte / Electrode Interface if IT-SOFC by Depth Resolved XAFS (2010)
  • Author(s): Takayuki Nakao, Toshiaki Ina, Yuki Orikasa, Tomokazu Fukutsuka,Yasuko Terada, Hajime Tanida, Tomoya Uruga, Masafumi Takagaki, Hidenori Toyokawa, Koji Amezawa, Tatsuya Kawada, Atsushi Mineshige and Yoshiharu Uchimoto
  • Organizer: 217th ECS Meeting
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 2010-04-27