Studies on anisotropic ionic conduction in apatite-type solid electrolyte

• Project/Area Number: 24550235
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic industrial materials
• Research Institution: University of Hyogo
• Principal Investigator: MINESHIGE Atsushi 兵庫県立大学, 工学(系)研究科(研究院), 准教授 (00285339)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: イオン伝導体 / 燃料電池 / アパタイト

Outline of Final Research Achievements

An oxide ionic diffusivity of oxyapatite-type solid electrolytes was investigated by structure refinement, and electrical conductivity and isotropic diffusion coefficient measurements. It was found that fast ionic conduction along c axis in this oxide was probably done via an interstitialcy mechanism, whereas, conduction perpendicular to the c axis was carried out by vacancy-type diffusion. Since this material has an aisotropic ionic conductivity, oxygen ion diffusivity along each direction was evaluated by using single crystal obtained by the flux method. Although the obtained single crystal showed superior diffusivity along its c axis than that perpendicular to the axis, the diffusion coefficient value was low than expected probably due to impurity located in the specimens

Research Products

• [Journal Article] Oxide ion and electron transport properties in lanthanum silicate oxyapatite ceramics (2014)
  • Author(s): A. Mineshige, H. Mieda, M. Manabe, T. Funahashi, Y. Daiko, T. Yazawa, M. Nishi, T. Horita, K. Amezawa, K. Yashiro, T. Kawada, and H. Yoshioka
  • Journal Title: Solid State Ionics Volume: in press Pages: 555-558
  • DOI: 10.1016/j.ssi.2014.04.009
  • Peer Reviewed
• [Journal Article] c-axis oriented apatite-type silicates as solid electrolytes, (2013)
  • Author(s): K. Ueda, A. Mineshige, H. Takahashi, A. Saito, Y. Daiko, H. Yoshioka, and T. Yazawa
  • Journal Title: ECS Transactions Volume: 57[1] Issue: 1 Pages: 1143-1149
  • DOI: 10.1149/05701.1143ecst
  • Peer Reviewed
• [Presentation] フラックス法による単結晶ランタンシリケートの作製 (2015)
  • Author(s): 肖 懐洋, 嶺重 温, 植田 啓一, 矢澤 哲夫
  • Organizer: 第25回日本MRS年次大会
  • Place of Presentation: 横浜情報文化センター（神奈川県横浜市中区日本大通11番地）
  • Year and Date: 2015-12-08
• [Presentation] Oxyapatite Glass-Ceramics as Novel Electrolytes for Solid Oxide Fuel Cells (2014)
  • Author(s): K. Ueda, A. Mineshige, H. Yoshioka, and T. Yazawa
  • Organizer: 65th Annual Meeting of the International Society of Electrochemistry
  • Place of Presentation: ローザンヌ（スイス）
  • Year and Date: 2014-08-31 – 2014-09-05
• [Presentation] Electrochemical Properties of Perovskite- and Ruddlesden-Popper-Type Cathode Materials in Oxygen-Excess-Type Solid Electrolyte (OESE) (2014)
  • Author(s): A. Mineshige, M. Tange, A. Saito, H. Mieda, T. Yazawa, H. Yoshioka, and R. Mori
  • Organizer: 65th Annual Meeting of the International Society of Electrochemistry
  • Place of Presentation: ローザンヌ（スイス）
  • Year and Date: 2014-08-31 – 2014-09-05
• [Presentation] 中温作動燃料電池用c軸配向オキシアパタイト電解質の作製 (2013)
  • Author(s): 植田 啓一, 嶺重 温, 高橋 宏和, 斉藤 篤史, 大幸 裕介, 吉岡 秀樹
  • Organizer: 第23回日本MRS年次大会
  • Place of Presentation: 横浜市開港記念会館他
• [Presentation] c軸優先配向性を有するアパタイト型イオン伝導体の作製 (2013)
  • Author(s): 植田 啓一, 嶺重 温, 高橋 宏和, 大幸 裕介, 矢澤 哲夫
  • Organizer: 電気化学会第80回大会
  • Place of Presentation: 東北大学（仙台）
• [Presentation] Ionic conductivity of oxyapatite-type silicate glass ceramics, (2012)
  • Author(s): H. Takahashi, A. Mineshige, Y. Daiko, H. Yoshioka, and T. Yazawa
  • Organizer: 63rd Annual Meeting of the International Society of Electrochemistry (ISE)
  • Place of Presentation: Prague, Czech Republic
• [Presentation] Crystal structure and electrical properties of Al-doped lanthanum silicate solid electrolytes (2012)
  • Author(s): T. Funahashi, A. Mineshige, H. Mieda, Y. Daiko, H. Yoshioka and T. Yazawa
  • Organizer: 222nd Electrochemical Society Meeting (PRIME2012)
  • Place of Presentation: Honolulu, USA
• [Presentation] ランタンシリケート電解質への元素添加が構造と物性に与える影響 (2012)
  • Author(s): 嶺重 温, 舩橋 昂広, 三枝 弘幸, 真鍋 満顕, 大幸 裕介, 吉岡 秀樹, 矢澤 哲夫
  • Organizer: 第38回固体イオニクス討論会
  • Place of Presentation: 京都テルサ（京都）