Structural analysis of superionic conductors for development of Innobative materials

• Project/Area Number: 15K21105
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Inorganic industrial materials; Structural/Functional materials
• Research Institution: Kyoto University
• Principal Investigator: Onodera Yohei 京都大学, 原子炉実験所, 助教 (20531031)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 超イオン伝導体 / 固体電解質 / リチウムイオン電池 / 中性子回折 / X線回折 / 二体分布関数 / 逆モンテカルロ法 / 電池材料 / 中性子散乱 / X線散乱 / 逆モンテカルロモデリング

Outline of Final Research Achievements

Structural study of Li10GeP2S12 glass and crystal with high ionic conductivity have been performed by combined neutron and X-ray diffraction with the aid of reverse Monte Carlo (RMC) modeling. It is found that vacancy sites for Li ion extracted from 3D RMC atomic structures of Li10GeP2S12 glass and crystal are strongly related to ionic conductivity.

Research Products

• [Journal Article] Structural origin of massive improvement in Li-ion conductivity on transition from (Li2S)5(GeS2)(P2S5) glass to Li10GeP2S12 crystal (2017)
  • Author(s): K. Mori, T. Kasai, K. Iwase, F. Fujisaki, Y. Onodera, T. Fukunaga
  • Journal Title: Solid State Ionics Volume: 301 Pages: 163-169
  • DOI: 10.1016/j.ssi.2017.01.023
  • Peer Reviewed
• [Presentation] 金属硫化物系イオン伝導ガラスNa2S-Al2S3の創製と構造研究 (2017)
  • Author(s): 小野寺陽平、出島一仁、福永俊晴
  • Organizer: 日本セラミックス協会2017年年会
  • Place of Presentation: 日本大学・駿河台キャンパス
  • Year and Date: 2017-03-17
• [Presentation] メカニカルアロイング法によって作製したアモルファスP2S5の構造 (2016)
  • Author(s): 小野寺陽平、小原真司、森一広、福永俊晴
  • Organizer: 日本セラミックス協会第29回秋季シンポジウム
  • Place of Presentation: 広島大学・東広島キャンパス
  • Year and Date: 2016-09-07
• [Presentation] 超イオン伝導ガラスNa2S-P2S5の伝導特性と構造 (2016)
  • Author(s): 小野寺陽平、中島広志、大友季哉、福永俊晴
  • Organizer: 第19回超イオン導電体物性研究会
  • Place of Presentation: 山形テルサ
  • Year and Date: 2016-06-09
• [Presentation] Structure and ionic conductivity of Na-P-S superionic conductors by neutron and X-ray scattering (2016)
  • Author(s): Yohei Onodera, Hiroshi Nakashima, Toshiya Otomo, Toshiharu Fukunaga
  • Organizer: THERMEC’2016 (International Conference on PROCESSING & MANUFACTURING OF ADOVABCED MATERIALS)
  • Place of Presentation: Graz, Austria
  • Year and Date: 2016-05-29
  • Int'l Joint Research / Invited