Evaluation of dynamic motion of hydrogen storage alloy chemical actuator

• Project/Area Number: 16K05969
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Yokohama National University
• Principal Investigator: NAKAO Wataru 横浜国立大学, 大学院工学研究院, 教授 (60361870)
• Research Collaborator: GOTO Kenta ; HIRATA Tomoyuki ; OZAKI Shingo ; YAMAMOTO Isao
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: インテリジェントデバイス / 化学反応 / 水素エネルギー / スマート材料 / 水素貯蔵合金 / 有限要素法解析 / アクチュエータ

Outline of Final Research Achievements

From the hydrogen diffusion simulation using the finite element method, we clarified the diffusion behavior of hydrogen in hydrogen storage alloy.
By developing an apparatus capable of directly measuring the dynamic behavior of the actuator characteristics of hydrogen storage alloy powder and using the experimental system produced, hydrogen adsorption and desorption reaction of representative hydrogen storage alloys Pd and LaNi5 powder The dynamic behavior of the actuator characteristics was measured.
The motion characteristics of the hydrogen storage alloy actuator were evaluated by integrating the hydrogen diffusion analysis in the hydrogen storage alloy and the results of the actuator characterization with the hydrogen storage alloy powder alone.

Academic Significance and Societal Importance of the Research Achievements

本研究では、水素貯蔵合金アクチュエータの運動特性を調査し、その変形挙動を特徴づける水素貯蔵合金中の水素物質移動を解析した。その結果、物理化学的現象と機械的性質を結びつけるナノスケールのマルチフィジックス問題の解の一例を示すことができた。
さらに、水素貯蔵合金アクチュエータという新たなケミカルスマート材料の有用性を示すことに成功した。

Research Products

• [Journal Article] Swelling response behavior of palladium during hydrogen absorption and discharge (2018)
  • Author(s): KentaGoto, Tomoyuk iHirata, Isao Yamamoto, WataruNakao
  • Journal Title: International Journal of Hydrogen Energy Volume: 43 Issue: 24 Pages: 11092-11099
  • DOI: 10.1016/j.ijhydene.2018.04.199
  • Peer Reviewed / Open Access
• [Journal Article] Effect of diffusion coefficient variation on interrelation between hydrogen diffusion and induced internal stress in hydrogen storage alloys (2017)
  • Author(s): Kenta Goto, Shingo Ozaki, Wataru Nakao
  • Journal Title: Journal of Alloys and Compound Volume: 691 Pages: 705-712
  • DOI: 10.1016/j.jallcom.2016.08.288
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] LaNi5粉末を用いた水素貯蔵合金アクチュエータの運 動特性評価 (2016)
  • Author(s): 平田智之、後藤健太、中尾航
  • Organizer: 第26回日本MRS年次大会
  • Place of Presentation: 神奈川県民ホール小会議室
  • Year and Date: 2016-12-18
• [Presentation] Development of simulation technique of kinetic behavior for hydrogen storage alloy actuators (2016)
  • Author(s): Kenta Goto, Wataru Nakao
  • Organizer: ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS 2016)
  • Place of Presentation: Stowe
  • Year and Date: 2016-09-28
  • Int'l Joint Research
• [Presentation] 水素貯蔵合金を用いた水素駆動アクチュエータ (2016)
  • Author(s): 後藤健太、平田智之、中尾航
  • Organizer: 日本機械学会2016年度年次大会
  • Place of Presentation: 九州大学
  • Year and Date: 2016-09-11
• [Presentation] 応力下での水素貯蔵合金アクチュエータの駆動速度変化 (2016)
  • Author(s): 後藤健太、尾崎伸吾、中尾航
  • Organizer: 日本機械学会2016年度年次大会
  • Place of Presentation: 九州大学
  • Year and Date: 2016-09-11