期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 33, 期 20, 页码 5611-5616出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2008.07.045
关键词
Hydrogen storage; Lithium borohydride; MgH2; Single-walled carbon nanotubes; Mechanical milling
资金
- Chinese Academy of Sciences
- National Natural Science Foundation of China [50571099, 50771094]
Single-walled carbon nanotubes (SWNTs) were mechanically milled with LiBH4/MgH2 mixture, and examined with respect to its effect on the reversible dehydrogenation properties of the Li-Mg-B-H system. Experimental results show that the addition of SWNTs results in an enhanced dehydriding rate and improved cyclic stability of the LiBH4/MgH2 composite. For example, the LiBH4/MgH2 composite with 10 wt% purified SWNTs additive can release nearly 10 wt% hydrogen within 20 min at 450 degrees C, with an average dehydriding rate over 2 times faster than that of the neat LiBH4/MgH2 sample. Based on the results of phase analysis and a series of designed experiments, the mechanism underlying the observed property improvement was discussed. (c) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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