Nanocomposite of Amorphous Ge and Sn Nanoparticles as an Anode Material for Li Secondary Battery
Open Access
- 1 January 2009
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 156 (4) , A277-A282
- https://doi.org/10.1149/1.3073877
Abstract
Nanocomposites of amorphous Ge and Sn nanoparticles are prepared from the vacuum annealing of the butyl-capped Ge gels and SnP0.94SnP0.94 nanoparticles at 400°C400°C for 7h7h , and their electrochemical properties and nanostructure changes are investigated during electrochemical cycling. The nanocomposite displays a first charge capacity of 1078mAh∕g1078mAh∕g with a capacity retention of 64% after 50cycles50cycles . However, both individual Ge and Sn nanoparticles display rapid capacity fade, showing <20%50cycles50cycles . A superior electrochemical property of the nanocomposite to the Sn and Ge nanoparticles is believed to be related to the fact that the amorphous Ge phase acts as an intergrain electrical connecter when Sn particles are pulverized.Keywords
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