文摘
By a novel in situ chemical vapor deposition, activated N-doped hollow carbon-nanotube/carbon-nanofiber composites are prepared having a superhigh specific Brunauer鈥揈mmett鈥揟eller (BET) surface area of 1840 m2 g鈥? and a total pore volume of 1.21 m3 g鈥?. As an anode, this material has a reversible capacity of 1150 mAh g鈥? at 0.1 A g鈥? (0.27 C) after 70 cycles. At 8 A g鈥? (21.5 C), a capacity of 320 mAh g鈥? fades less than 20% after 3500 cycles, which makes it a superior anode material for a Li-ion battery .