Synthesis of MoS2@C Nanotubes Via the Kirkendall Effect with Enhanced Electrochemical Performance for Lithium Ion and Sodium Ion Batteries

A MoS2 @C nanotube composite is prepared through a facile hydrothermal method, in which the MoS2 nanotube and amorphous carbon are generated synchronically. When evaluated as an anode material for lithium ion batteries (LIB), the MoS2 @C nanotube manifests an enhanced capacity of 1327 mA h g(-1) at 0.1 C with high initial Coulombic efficiency (ICE) of 92% and with capacity retention of 1058.4 mA h g(-1) (90% initial capacity retention) after 300 cycles at a rate of 0.5 C. A superior rate capacity of 850 mA h g(-1) at 5 C is also obtained. As for sodium ion batteries, a specific capacity of 480 mA h g(-1) at 0.5 C is achieved after 200 cycles. The synchronically formed carbon and stable hollow structure lead to the long cycle stability, high ICE, and superior rate capability. The good electrochemical behavior of MoS2 @C nanotube composite suggests its potential application in high-energy LIB.