title: Hydrogen absorption and desorption by the Li-Al-N-H system.
abstract: Lithium hexahydridoaluminate Li(3)AlH(6) and lithium amide LiNH(2) with 1:2 molar ratio were mechanically milled, yielding a Li-Al-N-H system. LiNH(2) destabilized Li(3)AlH(6) during the dehydrogenation process of Li(3)AlH(6), because the dehydrogenation starting temperature of the Li-Al-N-H system was lower than that of Li(3)AlH(6). Temperature-programmed desorption scans of the Li-Al-N-H system indicated that a large amount of hydrogen (6.9 wt %) can be released between 370 and 773 K. After initial H(2) desorption, the H(2) absorption and the desorption capacities of the Li-Al-N-H system with a nano-Ni catalyst exhibited 3-4 wt % at 10-0.004 MPa and 473-573 K, while the capacities of the system without the catalyst were 1-2 wt %. The remarkably increased capacity was due to the fact that the kinetics was improved by addition of the nano-Ni catalyst.
authors: Toyota Central R&D Labs, Inc., Nagakute-cho, Aichi-gun, Aichi, 480-1192, Japan. kojima@mosk.tytlabs.co.jp
authors: Yoshitsugu
authors: Y
authors: Kojima
authors: Mitsuru
authors: M
authors: Matsumoto
authors: Yasuaki
authors: Y
authors: Kawai
authors: Tetsuya
authors: T
authors: Haga
authors: Nobuko
authors: N
authors: Ohba
authors: Kazutoshi
authors: K
authors: Miwa
authors: Shin-ichi
authors: S
authors: Towata
authors: Yuko
authors: Y
authors: Nakamori
authors: Shin-ichi
authors: S
authors: Orimo