Abstract

A method of mechanical grinding using nanoparticle catalyst was applied to create hydrogen-absorbing magnesium alloy with a chemical composition of Mg-0.33 Ni-0.17 Fe (at%). The use of nanoparticle catalyst made it possible to achieve a 15-minute process time that was one-fortieth or less in comparison with the conventional method with an acceleration of 13.3 G. The synthesized hydrogen storage magnesium alloy possessed a microstructure with catalyst metal distributed uniformly across the powder surface and throughout the matrix. As a result, the alloy yielded significantly improved hydrogen storage capacity, achieving a maximum capacity of 7.49 wt%. This rate of hydrogen absorption places it in the world’s top level of hydrogen-absorbing alloys that are currently being reported.

References

1. (1) Osumi, Y.: Hydrogen Storing Alloy – Physicality and Application, Tokyo, Agne Gijutsu Center, p. 587 (1999)
2. (2) Orimo, S., Ikeda, K., Fujii, H. and Yamamoto, K: Structural and Hydriding Properties of the Mg-Ni-H System with Nano-and/or Amorphous Structures, Acta Mater., Vol. 45, No. 6, pp. 2271-2278 (1997)
3. (3) Orimo, S., Fujii, H. and Ikeda, K.,: Notable Hydriding Properties of a Nanostructured Composite Material of the Mg2Ni-H System Synthesized by Reactive Mechanical Grinding, Acta mater., Vol. 45, No. 1, pp .331-341 (1997)
4. (4) Zaluski, L., Zaluska, A. and Strom-Olsen, J., O.: Hydrogen Absorption in Nanocrystalline Mg2Ni Formed by Mechanical Alloying, J. Alloys and Comp., vol. 217, pp. 245-249 (1995)
5. (5) Orimo, S., Fujii, H.: Unique Hydrogenation Property of Nanostructured Mg2Ni-H Alloy, The Japan Institute of Metals Report, Vol. 60, No. 7, pp. 685-692 (1996)
6. (6) Orimo, S., Fujii, H.: Hydrogenation Property of Amorphous Monolayer Mg-Ni-H (D) Alloy, The Japan Institute of Metals Report, Vol. 63, No. 8, pp. 959-964 (1999)
7. (7) Zaluski, L., Zaluska, A. and Strom-Olsen, J., O.: Nanocrystalline Metal Hydrides, J. Alloys and Comp., Vol. 253-254, pp. 70-79 (1997)
8. (8) Akiba, Y.: Alloy Having the Largest Amount of Hydrogen Absorption, Materia, Vol. 35, No. 11, pp. 1191-1194 (1996)
9. (9) Ezaki, K.: Current Status and Issues with Hydrogen Storage Alloy Tank for Automobiles, MH Utilization and Development Study Group, Material for 4th Conference in 2001, pp. 1-14

Author (organization or company)

• Izuru KANOYA（Wako Research Center）
• Mitsuya HOSOE（Wako Research Center）
• Takanori SUZUKI（Wako Research Center）

Publication Information

Article of Honda R&D Technical Review Vol.14 No.2 (91 - 98)

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