One-step solid-phase synthesis of binder-free molybdenum disulfide/carbon fibers paper anode for high-performance lithium-ion batteries

Abstract

A facile one-step solid-phase synthesis strategy is developed for synthesizing a binder-free molybdenum disulfide/carbon fibers paper (MoS2/CFP) anode. The microstructure, composition, morphology and electrochemical performances were investigated. It is found that the thin MoS2 layers are well anchored on the interlaced carbon fibers to form MoS2/CFP, which has mesoporous structure and large specific surface area of ∼18.8 m2g-1. As a result, the obtained MoS2/CFP anode exhibits a reversible capacity of 261 mAh·g−1 with 31.2% loading ratio of MoS2. After subtracting the capacity of CFP, the MoS2 in the composite anode delivers a reversible capacity of 539 mAh·g−1 and shows better cycle stability than commercial MoS2 after 100 cycles at 100 mA g−1. The remarkable electrochemical performances could be attributed to the buffer space among carbon fibers for the volume changes of MoS2 as well as the highly conductive carbon fibers network, suggesting that the MoS2/CFP is a promising binder-free anode for lithium-ion batteries.