Interfacial Engineering of MoS<sub>2</sub>/V<sub>2</sub>O<sub>3</sub>@C-rGO Composites with Pseudocapacitance-Enhanced Li/Na-Ion Storage Kinetics
Yu Rao, Kongjun Zhu, Guoliang Zhang, Feng Dang, Jiatao Chen, Penghua Liang, Zhihan Kong, Jun Guo, Hongjuan Zheng, Jie Zhang, Kang Yan, Jinsong Liu, Jing Wang
Abstract
Molybdenum sulfide has been widely investigated as a prospective anode material for Li + /Na + storage because of its unique layered structure and high theoretical capacity. However, the enormous volume variation and poor conductivity limit the development of molybdenum sulfide. The rational design of a heterogeneous interface is of great importance to improve the structure stability and electrical conductivity of electrode materials. Herein, a high-temperature mixing method is implemented in the hydrothermal process to synthesize the hybrid structure of MoS 2 /V 2 O 3 @carbon-graphene (MoS 2 /V 2 O 3 @C-rGO). The MoS 2 /V 2 O 3 @C-rGO composites exhibit superior Li + /Na + storage performance due to the construction of the interface between the MoS 2 and V 2 O 3 components and the introduction of carbon materials, delivering a prominent reversible capacity of 564 mAh g –1 at 1 A g –1 after 600 cycles for lithium-ion batteries and 376.3 mAh g –1 at 1 A g –1 after 450 cycles for sodium-ion batteries. Theoretical calculations confirm that the construction of the interface between the MoS 2 and V 2 O 3 components can accelerate the reaction kinetics and enhance the charge-ionic transport of molybdenum sulfide. The results illustrate that interfacial engineering may be an effective guide to obtain high-performance electrode materials for Li + /Na + storage.