Elucidation of the Anion Conduction Mechanism in Solid Alkaline Electrolytes by Multi Probes and Simulations

• Project/Area Number: 25871142
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Inorganic industrial materials; Inorganic materials/Physical properties
• Research Institution: The Institute of Physical and Chemical Research
• Principal Investigator: KATO Kenichi 独立行政法人理化学研究所, 放射光科学総合研究センター, 専任研究員 (90344390)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 超イオン伝導 / 層状酸化物 / 放射光X線回折 / ラマン分光 / 交流インピーダンス / 化学処理 / その場観察 / プロトン / 還元・水和反応 / 濃淡電池 / 分子動力学シミュレーション / 放射光

Outline of Final Research Achievements

We have elucidated the structural changes during a two-step chemical treatment by synchrotron X-ray diffraction and Raman spectroscopy in an electronic conductor layered oxide that is transformed into a superionic conductor by its treatment. Moreover, we have optimized the chemical condition to maximize ionic conductivity. Results will lead to design of solid electrolytes for high-performance fuel cells.

Research Products

• [Presentation] In Situ静電場解析による超イオン伝導体NaxCoO2の拡散トレース (2014)
  • Author(s): 加藤健一、笠井秀隆、高田昌樹、堀彰宏、北川進、田中宏志、有川英一、竹口竜弥、小林顕、尾澤伸樹、久保百司、貞清正彰、山内美穂
  • Organizer: 平成26年度日本結晶学会年会
  • Place of Presentation: 東京大学農学部
  • Year and Date: 2014-11-03
• [Presentation] Structural Basis for Emergence of Superionic Conductivity by an Ion Exchange (2014)
  • Author(s): 加藤健一、笠井秀隆、堀彰宏、高田昌樹、北川進、田中宏志、小林顕、尾澤伸樹、久保百司、有川英一、竹口竜弥、貞清正彰、山内美穂
  • Organizer: 23rd International Congress and General Assembly of the International Union of Crystallography (IUCr2014)
  • Place of Presentation: Montreal Convention Center, Canada
  • Year and Date: 2014-08-07
• [Presentation] アルカリ形固体電解質の水酸化物イオン伝導機構
  • Author(s): 加藤健一
  • Organizer: 分子システム研究第2回春季研究会
  • Place of Presentation: 静岡県、御殿場高原ホテルBU
• [Presentation] NaxCoO2のイオン伝導性発現とその構造原理
  • Author(s): 加藤健一
  • Organizer: 日本セラミックス協会第26回秋季シンポジウム
  • Place of Presentation: 長野県、信州大学長野キャンパス
• [Presentation] Visualization of the Ionic Conduction Pathway coupled by Electrostatic Interactions in a Layered Oxide
  • Author(s): 加藤健一
  • Organizer: The 12th Conference of the Asian Crystallographic Association
  • Place of Presentation: Tseung Kwan O, Hong Kong
  • Invited
• [Presentation] 静電ポテンシャル解析によるNaxCoO2のイオン伝導可視化
  • Author(s): 加藤健一
  • Organizer: 第27回日本放射光学会年会・放射光科学合同シンポジウム
  • Place of Presentation: 広島県、広島国際会議場
• [Presentation] SR Diffraction Probe for Energy-Related Materials
  • Author(s): 加藤健一
  • Organizer: CRC International Symposium: Catalysis and Technology for Green Innovation
  • Place of Presentation: 北海道、北海道大学触媒化学研究センター
  • Invited
• [Presentation] Structure Basis for Emergence of the Superionic Conductivity in an Ion-Exchange NaxCoO2
  • Author(s): 加藤健一
  • Organizer: 日本化学会第94春季年会
  • Place of Presentation: 愛知県、名古屋大学東山キャンパス
• [Remarks] 放射光を使い、物質の機能を生み出す電子を見る研究者
  • URL: http://www.riken.jp/careers/intro/201403/