Kazuhiko Tokoyoda
Taiheiyo Cement
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Publication
Featured researches published by Kazuhiko Tokoyoda.
Materials | 2015
Hiroki Miyaoka; Yongming Wang; Satoshi Hino; Shigehito Isobe; Kazuhiko Tokoyoda; Takayuki Ichikawa; Yoshitsugu Kojima
Various synthesis and rehydrogenation processes of lithium hydride (LiH) and magnesium amide (Mg(NH2)2) system with 8:3 molar ratio are investigated to understand the kinetic factors and effectively utilize the essential hydrogen desorption properties. For the hydrogen desorption with a solid-solid reaction, it is expected that the kinetic properties become worse by the sintering and phase separation. In fact, it is experimentally found that the low crystalline size and the close contact of LiH and Mg(NH2)2 lead to the fast hydrogen desorption. To preserve the potential hydrogen desorption properties, thermochemical and mechanochemical rehydrogenation processes are investigated. Although the only thermochemical process results in slowing the reaction rate due to the crystallization, the ball-milling can recover the original hydrogen desorption properties. Furthermore, the mechanochemical process at 150 °C is useful as the rehydrogenation technique to preserve the suitable crystalline size and mixing state of the reactants. As a result, it is demonstrated that the 8LiH and 3Mg(NH2)2 system is recognized as the potential hydrogen storage material to desorb more than 5.5 mass% of H2 at 150 °C.
Journal of Alloys and Compounds | 2005
Takayuki Ichikawa; Kazuhiko Tokoyoda; Haiyan Leng; Hironobu Fujii
Journal of Physical Chemistry C | 2009
Nobuko Hanada; Takayuki Ichikawa; Shigehito Isobe; Tessui Nakagawa; Kazuhiko Tokoyoda; Tetsuo Honma; Hironobu Fujii; Yoshitsugu Kojima
Journal of Alloys and Compounds | 2007
Kazuhiko Tokoyoda; Satoshi Hino; Takayuki Ichikawa; Keisuke Okamoto; Hironobu Fujii
Thermochimica Acta | 2008
Shigehito Isobe; Takayuki Ichikawa; Kazuhiko Tokoyoda; Nobuko Hanada; Haiyan Leng; Hironobu Fujii; Yoshitsugu Kojima
Archive | 2006
Hironobu Fujii; Takayuki Ichikawa; Haiyan Leng; Shigehito Isobe; Nobuko Hanada; Toyoyuki Kubokawa; Kazuhiko Tokoyoda; Keisuke Okamoto; Shinkichi Tanabe; Shigeru Matsuura; Kenji Ogawa
International Journal of Hydrogen Energy | 2009
Hideaki Tanaka; Kazuhiko Tokoyoda; Mitsuru Matsumoto; Y. Suzuki; Tetsu Kiyobayashi; Nobuhiro Kuriyama
International Journal of Hydrogen Energy | 2011
Shingo Ikeda; Kazuhiko Tokoyoda; Tetsu Kiyobayashi; Nobuhiro Kuriyama
Journal of Alloys and Compounds | 2007
Keisuke Okamoto; Kazuhiko Tokoyoda; Takayuki Ichikawa; Hironobu Fujii
Journal of Alloys and Compounds | 2007
Satoshi Hino; Takayuki Ichikawa; Kazuhiko Tokoyoda; Yoshitsugu Kojima; Hironobu Fujii
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National Institute of Advanced Industrial Science and Technology
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