Measurements of local ionic conductivities around ferroelectric/solid electrolyte interface

2015 Fiscal Year Final Research Report

• Project/Area Number: 25288115
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Device related chemistry
• Research Institution: Nagoya University
• Principal Investigator: IRIYAMA Yasutoshi 名古屋大学, 工学(系)研究科(研究院), 教授 (30335195)
• Co-Investigator(Kenkyū-buntansha): MOTOYAMA Munekazu 名古屋大学, 工学研究科, 講師 (30705752)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 二次電池 / 界面 / 原子間力顕微鏡 / 全固体電池

Outline of Final Research Achievements

Complex dielectric constant of ionic conductive materials have concerned with the ionic conductivities. We developed a measurement system to estimate local dielectric constant of glass electrolyte by using amplitude modulation type atomic force microscopy (AM-AFM). Thin films of lithium phosphorus oxynitride glass electrolyte (LiPON) were prepared on highly oriented pyro graphite substrate and measure the dielectric constant. The measured value, ca. 20, was in good agreement with the reported valuw (16-20), indicating that our measurement system works well. Then, we evaluated the voltage dependency of dielectric constant around the BaTiO3-LiPON interface. The AM-AFM observations suggested a formation of a region around the interface, where higher dielectric constant was observed against the value measured in the bulk.

Free Research Field

電気化学