ABSTRACT
Graphitized mesoporous carbon materials have highly conductive paths, which can accelerate the electrochemical reaction rate and electron movement speed, thus providing sufficient internal structure cavity for the volume expansion generated in the process of lithium intercalation and deactivation. In this paper, we further researched the effect of the graphitization degree of carbon materials filled with mesoporous for high-rate performance Li-S batteries. Graphitized mesoporous carbon materials are synthesized through Chemical Vapor Deposition (CVD) approach where acetonitrile serves as a carbon source and SBA-15 as a template, which is named CVD-C. Compared with CMK-3, the CVD-C materials display superior cycling and high-rate performance for Li-S batteries. Hence, when the temperature reached 1000°C and the current rate increased to 5°C over 300 cycles, an optimized CVD-C material electrode exhibited a low capacity decay rate of 0.13% each cycle.
