Studies on anisotropic ionic conduction in apatite-type solid electrolyte

2015 Fiscal Year Final Research Report

• 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
• 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

Free Research Field

無機材料・物性