LAUSR

Abstract Uniform nanocable-like Nb 2 O 5 /surface-modified carbon nanotubes (SMCNTs) composites for anode materials in lithium ion batteries were synthesized by hydrothermal method. It was indicated that Nb 2 O 5 nanoparticles were tightly and uniformly cultivated on carbon nanotubes when CNTs were pretreated with concentrated H 2 SO 4 . As a result, Nb 2 O 5 /SMCNTs composite materials showed remarkable electrochemical performance as anode materials for lithium-ion batteries. It delivered a high reversible capacity of 441 mA h g −1 cycled at the current density of 40 mA g −1 after 100 cycles and an excellent rate capacity of 185 mA h g −1 at the high current density of 5000 mA g −1 after 200 cycles.