Atomic resolution analysis of nanostructures in solid-state ionics

• Project/Area Number: 22760513
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Inorganic materials/Physical properties
• Research Institution: National Institute for Materials Science (2011-2012); Osaka University (2010)
• Principal Investigator: KIKKAWA Jun 独立行政法人物質・材料研究機構, 表界面構造・物性ユニット, 研究員 (20435754)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 機能性セラミックス / 遷移金属酸化物 / 分析電子顕微鏡法 / 二次電池 / ナノワイヤ / 分析電子顕鏡

Research Abstract

Nanostructures for electrode materials can enhance the performance of rechargeable batteries. In this study, VO_2(A) nanowires with diameter of less than 50 nm and single-crystalline V_2O5 sheets with thicknesses of 50?100 nm were grown on silicon substrates and aluminum foils respectively by the physical vapor transport method. We investigated the performance of the nanometer-thick V2O5 sheets grown on an aluminum foil as a positive electrode material in lithium-ion batteries. Vanadium ions were reduced from 5+ to 4+ and partially to 3+ during the first discharge. A charge-discharge rate was also measured.

Research Products

• [Presentation] バインダーフリー二次電池電極の作製と評価 (2012)
  • Author(s): 吉川純、橘田晃宜、香山正憲
  • Organizer: 日本顕微鏡学会第68回学術講演会
  • Place of Presentation: つくば国際会議場
• [Presentation] バインダーフリー二次電池電極の作製と評価 (2012)
  • Author(s): 吉川純、橘田晃宜、香山正憲
  • Organizer: 日本顕微鏡学会第68回学術講演会
  • Place of Presentation: つくば国際会議場（つくば市）
• [Presentation] アセチルアセトナート錯体を用いた酸化バナジウム・ナノワイヤの成長 (2011)
  • Author(s): 石部貴史、吉川純、中村芳明、酒井朗
  • Organizer: 第72回応用物理学学術講演会
  • Place of Presentation: 山形大学2011-08-29-0902
• [Presentation] アセチルアセトナート錯体を用いた酸化バナジウム・ナノワイヤの成長 (2011)
  • Author(s): 石部貴、吉川純、中村芳明、酒井朗
  • Organizer: 2011年度秋季 第72回応用物理学学術講演会
  • Place of Presentation: 山形大学（山形市）