High-yield bamboo-like porous carbon nanotubes with high-rate capability as anodes for lithium-ion batteries

Abstract

Bamboo-like porous carbon nanotubes (BCNTs) are prepared on a large scale through the pyrolysis of bamboo-like highly crosslinked polydivinylbenzene nanotubes. As anode materials for lithium-ion batteries, the BCNTs exhibit excellent electrochemical performance, attaining a high discharge capacity of 335 mA h g−1 at a current of 100 mA g−1. Even at a higher charge–discharge rate of 1000 mA g−1, a high discharge capacity of 230 mA h g−1 can be obtained for up to 300 cycles, which indicates the material has an excellent high-rate performance and cycle stability due to the separated hollow compartment structure and rich micropores on the surface of the BCNTs with the high BET surface area of 490.8 m2 g−1.