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Nano Lett. 2009 Nov;9(11):3844-7. doi: 10.1021/nl902058c.

Silicon nanotube battery anodes.

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School of Energy Engineering, Ulsan National Institute of Science & Technology, Ulsan, Korea 689-798, Beamline Research Division, Pohang Accelerator Laboratory, Pohang, Korea.


We present Si nanotubes prepared by reductive decomposition of a silicon precursor in an alumina template and etching. These nanotubes show impressive results, which shows very high reversible charge capacity of 3247 mA h/g with Coulombic efficiency of 89%, and also demonstrate superior capacity retention even at 5C rate (=15 A/g). Furthermore, the capacity in a Li-ion full cell consisting of a cathode of LiCoO2 and anode of Si nanotubes demonstrates a 10 times higher capacity than commercially available graphite even after 200 cycles.


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