Hydrogen absorption properties of Li-Mg-N-H system
Journal of Alloys and Compounds Volume 400 Issue 1-2
Page 245-248
published_at 2005-09-01
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| File | |
| Title ( eng ) |
Hydrogen absorption properties of Li-Mg-N-H system
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| Creator |
Tokoyoda Kazuhiko
Leng Haiyan
Fujii Hironobu
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| Source Title |
Journal of Alloys and Compounds
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| Volume | 400 |
| Issue | 1-2 |
| Start Page | 245 |
| End Page | 248 |
| Abstract |
Isothermal hydrogen absorption properties of the ball milled mixture of 3Mg(NH2)2 and 8LiH after dehydrogenation at 200 °C under high vacuum were investigated at two different temperatures of 150 and 200 °C. The pressure –composition isotherm (PCT) curve at 200 °C revealed a two-plateaus-like behavior, while the PCT curve at 150 °C showed a single-plateau-like behavior. The hydrogenated phases were composed of LiH and Mg(NH2)2 under 9 MPa at 200 °C, while those were observed as mixed phases of LiH and LiNH2 at 150 °C without any trace of Mg(NH2)2 in XRD measurements. These results indicate that there are 2 step hydrogenation processes corresponding to high and low pressures at 200 °C, but the kinetics at 150 °C is too slow to proceed with the second hydrogenating step at high pressure region.
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| Keywords |
Hydrogen storage materials
Gas-solid reactions
High-energy ball milling
Mechanochemical synthesis
Thermal analysis
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| NDC |
Physics [ 420 ]
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
Elsevier B.V.
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| Date of Issued | 2005-09-01 |
| Rights |
Copyright (c) 2005 Elsevier B.V.
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| Publish Type | Author’s Original |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0925-8388
[DOI] 10.1016/j.jallcom.2005.03.068
[NCID] AA10817249
[DOI] http://dx.doi.org/10.1016/j.jallcom.2005.03.068
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