Silicon nanotube battery anodes.
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.
Park
Mi-Hee
MH
School of Energy Engineering, Ulsan National Institute of Science & Technology, Ulsan, Korea 689-798, Beamline Research Division, Pohang Accelerator Laboratory, Pohang, Korea.
Kim
Min Gyu
MG
Joo
Jaebum
J
Kim
Kitae
K
Kim
Jeyoung
J
Ahn
Soonho
S
Cui
Yi
Y
Cho
Jaephil
J