Investigation of microstructure evolution during hydrogenation/dehydrogenation

• Project/Area Number: 24560853
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Kyushu University
• Principal Investigator: MATSUDA Junko 九州大学, カーボンニュートラル・エネルギー国際研究所, 助教 (00415952)
• Co-Investigator(Kenkyū-buntansha): YOSHIDA Kenta 名古屋大学, 高等研究院, 助教 (10581118) ; SHAO Huaiyu 九州大学, カーボンニュートラル・エネルギー国際研究所, 助教 (20614697) ; LI Haiwen 九州大学, 水素エネルギー国際研究センター, 准教授 (40400410) ; SASAKI Yukichi ファインセラミックスセンター, ナノ構造解析研究所, グループ長、主席研究員 (40426507) ; AKIBA Etsuo 九州大学, 工学研究院, 教授 (90356345)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 水素吸蔵反応 / その場観察 / 環境制御型TEM / 環境制御型透過電子顕微鏡

Outline of Final Research Achievements

In situ transmission electron microscopy (TEM) was performed to observe the hydrogenation of Mg-Ni films in a hydrogen atmosphere of 80-100 Pa. An aberration-corrected environmental TEM with a differential pumping system allows us to reveal the Angstrom-scale structure of the films in the initial stage of hydrogenation: first, nucleation and growth of Mg2NiH4 crystals with a lattice spacing of 0.22 nm in an Mg-rich amorphous matrix of the film occurs within 20 seconds after the start of the high-resolution observation, then crystallization of MgH2 with a smaller spacing of 0.15 nm happens after approximately 1 min. Our in situ TEM method is also applicable to the analysis of other hydrogen-related materials.

Research Products

• [Journal Article] In situ observation on hydrogenation of Mg-Ni films using environmental transmission electron microscope with aberration correction (2014)
  • Author(s): Junko Matsuda, Kenta Yoshida, Yukichi Sasaki, Naoki Uchiyama, Etsuo Akiba
  • Journal Title: Appl. Phys. Lett. Volume: 105 Issue: 8
  • DOI: 10.1063/1.4894101
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 水素吸蔵反応のTEMその場観察 (2014)
  • Author(s): 松田 潤子, 吉田 健太
  • Journal Title: 顕微鏡 Volume: 49 Pages: 83-87
  • NAID: 130007701719
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Mg-Ni膜の水素吸蔵反応その場TEM観察 (2015)
  • Author(s): 松田 潤子, 吉田 健太, 佐々木 優吉, 内山 直樹, 秋葉 悦男
  • Organizer: 日本顕微鏡学会, 第71回学術講演会
  • Place of Presentation: 京都市, 国立京都国際会館
  • Year and Date: 2015-05-14
• [Presentation] In situ TEM observation on hydrogen storage materials (2014)
  • Author(s): Junko Matsuda, Kenta Yoshida, Yukichi Sasaki, Naoki Uchiyama, Etsuo Akiba
  • Organizer: 18th International Microscopy Congress 2014 (IMC2014)
  • Place of Presentation: Prague, Czech Republic
  • Year and Date: 2014-09-08 – 2014-09-09
• [Presentation] In situ TEM observation on hydrogenation of Mg-Ni films deposited by magnetron sputtering (2014)
  • Author(s): Junko Matsuda, Kenta Yoshida, Yukichi Sasaki, Naoki Uchiyama, Etsuo Akiba
  • Organizer: 14th Internationa Symposium on Metal-Hydrogen Systems (MH2014)
  • Place of Presentation: Manchester, UK
  • Year and Date: 2014-07-24
• [Presentation] Mg-Ni膜の水素吸蔵過程TEMその場観察 (2013)
  • Author(s): 松田 潤子、吉田 健太、内山 直樹、秋葉 悦男
  • Organizer: 日本金属学会2013年秋期講演大会
  • Place of Presentation: 金沢大学（金沢市）
• [Presentation] Microstructure and hydrogenation/dehydrogenation properties of Mg-Ni films deposited by magnetron sputtering (2013)
  • Author(s): 松田潤子
  • Organizer: Gordon Research Conference Hydrogen-Metal Systems
  • Place of Presentation: Barga, Italy
• [Presentation] 水素吸蔵反応のその場観察
  • Author(s): 松田 潤子、吉田 健太、内山 直樹、秋葉 悦男
  • Organizer: 日本顕微鏡学会 その場観察研究部会第１回（2013年）研究討論会
  • Place of Presentation: 山梨大学（甲府市）
  • Invited