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Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

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Detailed investigation of ion exchange in ball-milled LiH + MgB2 system using ultra-high field nuclear magnetic resonance spectroscopy

Cited 8 times inthomson ciCited 8 times inthomson ci
Title
Detailed investigation of ion exchange in ball-milled LiH + MgB2 system using ultra-high field nuclear magnetic resonance spectroscopy
Other Titles
Detailed investigation of ion exchange in ball-milled LiH + MgB2 system using ultra-high field nuclear magnetic resonance spectroscopy
Author
Hu, Jian ZhiKwak, JahunYang, ZhenguoWan, XuefeiShaw, Leon L.
Keywords
Hydrogen storage; Lithium borohydride; Magnesium diboride; Li-6 nuclear magnetic resonance
Issue Date
2010-06
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.195, no.11, pp.3645 - 3648
Abstract
The present Study with the detailed H-1-Li-6 cross polarization NMR analysis confirms the formation of a ternary compound, (Mg1-xLi2x)B-2, during ball milling of LiH+(1/2)MgB2 at room temperature. The Li-6 sites in (Mg1-xLi2x)B-2 exhibit spinning sidebands (SSBs), whereas the Li-6 sites in LiH do not. The SSBs and the very short spin-lattice relaxation time manifested by Li-6 sites in (Mg1-xLi2x)B-2 indicate that the Li ions in (Mg1-xLi2x)B-2 are located between the layered boron structures and close to Mg ions. The formation of (Mg1-xLi2x)B-2 explains the previous observation that the LiH + (1/2)MgB2 mixture ball-milled effectively has a greatly enhanced hydriding kinetics at temperatures below the melting point of LiBH4. (C) 2009 Elsevier B.V. All rights reserved
URI
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DOI
10.1016/j.jpowsour.2009.12.033
ISSN
0378-7753
Appears in Collections:
ECHE_Journal Papers
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