Few-layer MoS2 nanosheets anchored by CNT network for superior lithium storage

Abstract A novel self-assembled porous network of carbon nanotubes (CNTs) attached to molybdenum disulfide (MoS2) nanosheets is prepared via a one-step atmospheric pressure chemical vapor deposition (APCVD) method. The conventional APCVD method cannot be used to uniformly deposit three-dimensional (3D) structures. Instead, an alternative method is used to overcome the disadvantage of conventional APCVD, whereby molybdenum oxide (MoO3) is decomposed by a molybdate ion (MoO42−) using in situ sulfuration. The synergy between the highly conductive CNT network and the layered MoS2 nanosheets contributes to the formation of high-efficiency ion/electron channels and improves the electrode durability and stability. The as-prepared C-MoS2/CNT composite exhibits both high rate stability and long-term capacity in lithium-ion batteries (LIBs). The C-MoS2/CNT electrode has a much higher initial discharge capacity of 1430 mAh g−1 at 100 mA g−1 and an impressive rate capability (885 mAh g−1 at 4000 mA g−1). Moreover, the C-MoS2/CNT composite also exhibits a long cycle life of 1260 mAh g−1 after 200 cycles at 500 mA g−1 and 1066 mAh g−1 at 1000 mA g−1 after 250 cycles. The mechanism and design strategy presented in this work may provide ideas for the development of other electrode materials.