Materials design for novel lithium ion conductor using macro-tetrahedron cluster

• Project/Area Number: 25630271
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Inorganic materials/Physical properties
• Research Institution: Tohoku University
• Principal Investigator: HIROTSUGU Takizawa 東北大学, 工学(系)研究科(研究院), 教授 (90226960)
• 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: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 固体電解質 / 高圧合成 / 共有結合性結晶 / リチウムイオン伝導体 / チャンネル構造

Outline of Final Research Achievements

Novel lithium ion conductor of Li-B-S system and Li-Sn-O system were investigated using high-pressure synthesis and microwave synthesis method. New Li2B2S5 phase was obtained at 3 ~ 6 GPa and 600-1000 ℃ and their crystal structure was analyzed. Novel Li4xSn4-xO8 was synthesized by microwave irradiation. Structural analysis and ion conductivity of Li2B2S5 and Li4xSn4-xO8 strongly suggest that that are candidate materials for Li-ion conductor.

Research Products

• [Presentation] 第一原理計算による固体電解質Na4Sn3O8におけるナトリウムイオン拡散解析 (2014)
  • Author(s): 浅利祐介、川治純、藤枝正、林大和、滝澤博胤
  • Organizer: 電気化学会
  • Place of Presentation: 北海道大学高等教育推進機構（北海道札幌市）
  • Year and Date: 2014-09-27
• [Presentation] 固体電解質Na4Sn3O8におけるイオン拡散の第一原理解析 (2014)
  • Author(s): 浅利祐介、川治純、藤枝正、林大和、滝澤博胤
  • Organizer: 応用物理学会
  • Place of Presentation: 北海道大学札幌キャンパス（北海道札幌市）
  • Year and Date: 2014-09-19
• [Presentation] Synthesis and characterization of new Li ion conductive Li-Sn-O compounds (2013)
  • Author(s): Y. Nakatani, Y. Hayashi, J. Fukushima, H. Takizawa
  • Organizer: International Symposium for the 70th Anniversary of the Tohoku Branch of the Chemical Society of Japan
  • Place of Presentation: Tohoku University, Sendai, Japan