3D Conductive Network Supported Monolithic Molybdenum Disulfide Nanosheets for High-Performance Lithium Storage Applications

Hierarchical 3D graphene nanoribbons/carbon nanotubes–molybdenum disulfide (GR/CNT-MoS 2 ) nanocomposites have been facilely and controllably prepared. The GR/CNT matrix, which is prepared by partial unzipping of multiwalled CNTs, possesses good conductive networks by bridging graphene nanoribbons on different CNTs. MoS 2 with monolithic morphologies is anchored on the GR/CNT conductive networks, achieving the formation of hierarchical GR/CNT-MoS 2 nanocomposites. As a result of the good dispersion of MoS 2 , a large specific surface area (238 m 2 g −1 ) of GR/CNT-MoS 2 nanocomposite has been achieved. Excellent electrochemical performance including high specific capacity (1245 mA h g −1 ) and good cycling stability (90.9% capacity retention after 200 cycles) of the GR/CNT-MoS 2 nanocomposites is achieved due to the full exposure of the active sites of MoS 2 nanoflakes, and high electron transport ability of the GR/CNT substrate. These novel GR/CNT-MoS 2 nanocomposites show promising application in lithium ion batteries, and further provide a new way to design and develop new anode materials.