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Abstract：
To study the characteristics of nanostructured anode materials of Li batteries, the nanocrystalline Li-Si alloy was prepared. Nanocrystalline Li7Si3 alloy was prepared with the optimized processing route including a series of procedures as cast of polycrystalline Li7Si3 ingot, ball milling to obtain the amorphous powder and spark plasma sintering to prepare the nanocrystalline Li7Si3 bulk. The crystal structure was determined using the Rietveld refinement method and the Young＇s modulus was measured. Results show that the prepared nanocrystalline Li7Si3 has larger lattice constants compared with those of the conventional polycrystalline counterpart, i.e., a=b=0.4452 nm, c=1.8239 nm, and unit cell volume Vo=0.313070 nm3. The unit cell volume is 1.35% larger than that of the coarse-grained polycrystalline counterpart with a value of Vo=0.308886 nm3. The Young＇s modulus of the nanocrystalline Li7Si3 was as (30.6±2.4) GPa.
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Journal of Beijing University of Technology
ISSN： 0254-0037
Year： 2014
Issue： 9
Volume： 40
Page： 1432-1435
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ESI Highly Cited Papers on the List： 0 Unfold All
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30 Days PV： 0
