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- Kwak, Ja Hun
- Molecular Catalysis Lab.
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Detailed investigation of ion exchange in ball-milled LiH + MgB2 system using ultra-high field nuclear magnetic resonance spectroscopy
- Alternative Title
- Detailed investigation of ion exchange in ball-milled LiH + MgB2 system using ultra-high field nuclear magnetic resonance spectroscopy
- Author(s)
- Hu, Jian Zhi, Kwak, Jahun, Yang, Zhenguo, Wan, Xuefei, Shaw, Leon L.
- Issued Date
- 2010-06
- 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
- Publisher
- ELSEVIER SCIENCE BV
- ISSN
- 0378-7753
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