Journal
NANO LETTERS
Volume 10, Issue 3, Pages 860-863Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl903345f
Keywords
TiSi2; nanonet; Li ion battery; nanostructure
Categories
Funding
- Boston College
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We synthesized a unique heteronanostructure consisting Of two-dimensional TiSi2 nanonets and particulate Si coating. The high conductivity and the structural integrity of the TiSi2 nanonet core were proven as great merits to permit reproducible Li+ insertion and extraction into and from the Si coating. This heteronanostructure was tested as the anode material for Li+ storage. At a charge/discharge rate of 8400 mA/g, we measured specific capacities > 1000 mAh/g, Only an average of 0.1% capacity fade per cycle was observed between the 20th and the 100th cycles. The combined high capacity, long capacity life, and fast charge/discharge rate represent one of the best anode materials that have been reported. The remarkable performance was enabled by the capability to preserve the crystalline TiSi2 core during the charge/discharge process. This achievement demonstrates the potency of this novel heteronanostructure design as an electrode material for energy storage.
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