Structural optimization of novel one-dimensional composites based on in situ – grown 1D CNTs with an amorphous structure and 2D MoS2 nanosheets for improved Li storage

Abstract

Molybdenum disulfide is considered an excellent anode material for lithium-ion batteries due to its unique structure and high specific capacity. However, molybdenum disulfide's inherent low ionic transport rate and low intrinsic conductivity have limited its application in lithium-ion batteries. Compounding with carbon materials is an effective way to overcome these limitations in the application of molybdenum disulfide. In this work, the effect of carbon layer on the growth of molybdenum disulfide was systematically investigated in order to disclose the role and influence of carbon in composites with molybdenum disulfide. Furthermore, our work provides an effective method for the structural optimization of one-dimensional composites based on carbon and molybdenum disulfide just by controlling the ratio of carbon precursor to molybdenum source during its formation. After structural optimization, effective MoS₂@C composite materials were successfully synthesized, which exhibited greatly enhanced electrical conductivity and structural stability and maintained a specific capacity of 800.4 mA h g⁻¹ even after 1200 cycles at a current density of 1 A g⁻¹ possibly due to the excellent specific capacity of molybdenum disulfide.