To solve such a problem that when hydrogen-absorbed borohydride is heated or mixed with water, hydrogen can be released but the use of borohydride is limited since borohydride releases hydrogen at high temperature and further in general hydrogen-released borohydride can not be hydrogenated again and to provide a hydrogen storage material which can release hydrogen at low temperature and the hydrogen-released one of which can be hydrogenated again.
A method for forming the hydrogen storage material includes the steps of: preparing a first material of the chemical formula: M(BH4)x (wherein M is an alkali metal or an alkaline earth metal); preparing a second material to be selected from M(AlH4)xsatisfactorily M(AlH4)x with MClx, a mixture of MClx with Al, a mixture of MClx with AlH3, a mixture of MHx with Al, Al, and AlH3; and combining the first material with the second material under high hydrogen gas pressure for a while to form a third material having the hydrogen release temperature lower than that of the first material and the hydrogen mass density higher than that of the second material.
NAKAMURA KENJI
| JP2001519312A | 2001-10-23 | |||
| JP2007117989A | 2007-05-17 | |||
| JP2004196634A | 2004-07-15 | |||
| JP2007076979A | 2007-03-29 | |||
| JP2005186058A | 2005-07-14 | |||
| JPS538393A | 1978-01-25 |
| WO2009062850A1 | 2009-05-22 |
Takashi Ishida
Tetsuji Koga
Nagasaka Tomoyasu
Yoshihiro Kobayashi
Satoshi Deno