Solution-Processed MoS2-Expanded Graphite as a Fast-Charging Anode for Lithium-Ion Batteries

Abstract

The widespread demand for battery-powered technologies has propelled the search for efficient and commercially viable electrode materials with fast-charging abilities. Reported herein is an MoS₂-expanded graphite (EG) composite as a stable and high-rate lithium-ion battery (LIB) anode, delivering specific capacities of 796 mAh g⁻¹ at 0.5 A g⁻¹ and 320 mAh g⁻¹ at 20 A g⁻¹ over 400 cycles. Cyclability at extreme rates up to 50 A g⁻¹ (~103 mAh g⁻¹) illustrates its scope for fast charging applications. As a result of the processing technique, the exfoliated nanosheets have good interfacial contact which aids in charge transfer and maintaining structural integrity during continuous battery operation. Further, analytical electrochemical methods suggest a predominance of pseudocapacitive charge storage mechanism, explaining the anode performance at high rates.