Coaxial growth of carbon coated MoS_2 nanoparticles on carbon nanotube and their electrochemical evaluation

摘要

MoS_2 nanoparticles and amorphous carbon were anchored on multi-walled carbon nanotubes by a one step hydrothermal method. The carbon-CNT-MoS_2 composite possesses a coaxial structure and it was investigated as an electrode material in lithium battery. The composite exhibits excellent cyclic stability compared to pristine MoS_2. At a current density of 100 mA g~(-1), the carbon-CNT-MoS_2 composite retains a discharge capacity of 522 mA h g~(-1) with 98% columbic efficiency at the 50th cycle. Pristine MoS_2 and CNT-MoS_2 composite show negligible discharge capacity at 50th cycle. The improved electrochemical activity of carbon-CNT-MoS_2 composite is attributed to the unique coaxial architecture and nanos-tructuring of MoS_2.