Electrochemical lithium storage performance of three-dimensional foam-like biocarbon/MoS2 composites

Molybdenum disulfide (MoS2) was loaded on biocarbon using waste camellia dregs (CDs) as the carbon source, which was further coated with dopamine hydrochloride to construct biocarbon/MoS2 electrode composites. The electrochemical lithium storage performance of the composites with different MoS2 contents was investigated. SEM results demonstrated that the composite had a three-dimensional foam-like structure with MoS2 as the interlayer. XRD and HRTEM tests revealed that MoS2 interlayer spacing in the composite was expanded. XPS analysis showed that new Mo-N bonds were formed in the active material. The electrochemical tests showed that the composite with a MoS2 content of 63% had a high initial specific capacity of 1434 mA.h/g at a current density of 100 mA/g. After a long cycle at a high current, it also showed good cycling stability and the capacity retention was nearly 100%. In addition, it had good lithium ion deintercalation ability in the electrochemical kinetics test.