Fabrication of Ce2S3/MoS2 composites via recrystallization-sulfurization method and their improved electrochemical performance for lithium-ion batteries

A simple and novel method based on recrystallization-sulfurization method has been developed to fabricate Ce 2 S 3 /MoS 2 composite and their structure, morphology and electrochemical performance is researched systematically. The Ce 2 S 3 /MoS 2 composite exhibit enhanced electrochemical performance compared with Ce 2 S 3 and MoS 2 . Among them, Ce 2 S 3 /MoS 2 composite has an initial reversible discharge capacity of 187.5 mAh g −1 , coulombic efficiency of 78.6% and a reversible capacity as high as 636.5 mAh g −1 , coulombic efficiency of 99.7% after 500 cycles at a current density of 100 mA g −1 and the highest discharge capacity of 97.3 mAh g −1 at a high current density of 1000 mA g −1 , showing the best reversible capacity and cycling performance. The results show that the compositing between MoS 2 and Ce 2 S 3 can maintain the stability of the structure during the charge/discharge process and existence of Ce 2 S 3 can enhance the electrical conductivity of Ce 2 S 3 /MoS 2 composite and further improves the reversible capacities, cycling performance and rate performance of Ce 2 S 3 /MoS 2 composite.