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Etsuo Akiba Last modified date:2019.05.14

Research Professor / Hydrogen Storage Division
International Research Center for Hydrogen Energy

Other Organization

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Academic Degree
Ph. D.
Country of degree conferring institution (Overseas)
Field of Specialization
Materials Science, Hydrogen Energy, Crystal Structure Analysis
Total Priod of education and research career in the foreign country
Outline Activities
Research and development of hydrogen storage materials have been carried out as the one of the outstanding scientists of the field.
Research Interests
  • Hydrogen Storage Materials
    keyword : Hydrogen Energy,  Hydrogen Storage Materials, Hydrogen Absorbing Alloys, Crystal Structure Analysis
Current and Past Project
  • Renewable energy is converted to hydrogen and is stored. Stored hydrogen is converted to electricity, hydrogen fuel and heat depending on the energy demand in metropolitan area. This system can introduce renewable energy into city and solves the serious problems of environment and energy.
  • Research and development of hydrogen storage materials and systems for on board hydrogen storage
  • R & D of hydrogen storage materials through education and research of Ph. D. students and postdoctoral fellows.
  • To establish compact and energy efficient hydrogen storage systems through fundamental studies and materials
Academic Activities
1. PAIK BISWAJIT, LI Hai-Wen, WANG JIANHUI, Etsuo Akiba, A Li-Mg-N-H composite as H2 storage material: A case study with Mg(NH2)2-4LiH-LiNH2, Chemical Communications, 10.1039/C5CC02879E, 51, 10018-10021, 2015.05.
2. EMAMI MEIBODY HODA SADAT, EDALATI KAVEH, 松田 潤子, Etsuo Akiba, Zenji Horita, Hydrogen storage performance of TiFe after processing by ball milling, Acta Materialia, 88, 190-195, 2015.01.
3. Etsuo Akiba, 榊浩司, 寺下尚克, H. Kim, E. H. Majzoub, 町田晃彦, 若槻, 角掛繁, 中村優美子, Degradation mechanism against hydrogenation cycles in Mg2-xPrxNi4 (x = 0.6 and 1.0), 118, 6697-6705, 2014.09.
4. Etsuo Akiba, 松田 潤子, K. Yoshida, Y. Sasaki, N. Uchiyama, In situ observation on hydrogenation of Mg-Ni films using environmental transmission electron microscope with aberration correction, 105, 8, 083903, 2014.08.
5. Etsuo Akiba, EDALATI KAVEH, 松田 潤子, Alkira Yanagida, Zenji Horita, Activation of TiFe for hydrogen storage by plastic deformation using groove rolling and high-pressure torsion: Similarities and differences, 39, 15589-15594, 2014.08.
6. Etsuo Akiba, 松田 潤子, N. Uchiyama, T. Kanai, K. Harada, Effect of Mg/Ni ratio on microstructure of Mg-Ni films deposited by magnetron sputtering, 617, 47-51, 2014.06.
7. Etsuo Akiba, 蓑田愛, S. Oshima, H. Iki, Hydrogen storage capacity of lithium-doped KOH activated carbons, 606, 112-116, 2014.05.
1. 秋葉 悦男, S. Itano, H. Hirano, K. Ikeda, T. Otomo, Crystal structure and hydrogen occupation sites of Ti-V-Cr hydrogen absorbing alloys, 15th International Symposium on Metal-Hydrogen Systems, 2016.08, Ti based BCC alloys especially Ti-V-Cr alloys are one of the most realistic candidates for on-board hydrogen storage because they have about 4 wt% hydrogen capacity under ambient conditions. Reaction rate and other properties are also appropriate for that purpose. However, a part of hydrogen stored is not released under working condition of fuel cell vehicle. To understand the hydrogen that cannot be desorbed, crystal structure analysis is the first step of investigation but Ti-V-Cr is transparent to neutron because the sum of neutron scattering lengths is almost zero. Therefore, crystal structure of Ti-V-Cr hydrides has not been studied indetail..
3. 秋葉 悦男, 板野 祥大, 平野 弘将, 松田 潤子, 池田一貴, 大友季哉, Crystal structure analysis of Nb doped Ti-V-Cr hydrogen absorbing alloys using neutron diffraction, Pacifichem2015, 2015.12.
4. Etsuo Akiba, Kyushu University Hydrogen Project:  Challenges to realize a hydrogen society
, The Road to a Hydrogen Society: Prospects for Developing Zero-Emission Fuel and Outlook for U.S.-Japan Cooperation , 2016.04.
5. 秋葉 悦男, EDALATI KAVEH, 平野 弘将, 堀田善治, 板野 祥大, 池田一貴, 大友季哉, Ti Based Hydrogen Storage Materials for Stationary and Mobile Applications, World Hydrogen Technology Convention 2015, 2015.10.
6. 秋葉 悦男, Hydrogen and Fuel Cell Developments in Japan, World Hydrogen Technology Convention 2015, 2015.10.
7. Etsuo Akiba, Ti based Hydrogen Storage Materials for Mobile and Stationary Applications, IUPAC-2015 45th World Chemistry Congress, 2015.08.
8. Etsuo Akiba, Hydrogen Storage in Japan -Recent Progress and Future prospect-, Hy-SEA 2014 Hydrogen Storage - Embrittlement - Applications, 2014.10.
9. Etsuo Akiba, Improvement of Activation and Re-hydrogenation Behaviors of TiFe, International Symposium Metal-Hydrogen Systems (MH2014), 2014.07.
10. Etsuo Akiba, Hydrogen Storage and Transport: State-of-art and Future, Grand Renewable Energy 2014, 2014.06.
11. Etsuo Akiba, Every Hydrogen is Good Hydrogen, MH2012, 2012.10.
Membership in Academic Society
  • The Japanese Society for Neutron Science
  • Hydrogen Energy Systems Society of Japan
  • International Association of Hydrogen Energy
  • Japan Institute of Metals
  • Chemical Society of Japan
  • The paper titles "Direct Imaging of Hydrogen within a Crystalline Environment" presents the world first observation of hydrogen atoms using the most advanced transmission electron microscopy.