MoS2/C nanosheets Encapsulated Sn@SnOx nanoparticles as high-performance Lithium-iom battery anode material

A facile and scalable in situ synthesis strategy is developed to fabricate MoS2/C nanosheets encapsulated in Sn@SnOx nanoparticlesasahigh-performancelithiumionbatteryanodematerial. (*) With assistance of NaCl particles, MoS2/C nanosheets can be in situ synthesized with Sn@SnOx nanoparticles encapsulated. In the constructed architecture, the MoS2/C nanosheets can not only avoid the direct exposure of Sn@SnOx to the electrolyte and preserve the structural and interfacial stabilization of Sn@SnOx nanoparticles, but also accommodate the mechanical stress induced by the volume change of Sn@SnOx nanoparticles during the charge/discharge process. As a result, tested as an anode material, the Sn@SnOx@MoS2@C composite exhibits super-high rate capability (950 mAh g (1) at 0.2 A g (1), 815 mAh g (1) at 0.5 A g (1), 715 mAh g (1) at 1.0 A g (1), 625 mAh g (1) at 2.0 A g (1) and 500 mAh g (1) at 5.0 A g (1)) and extremely excellent cycling performance at high rate (a high capacity of 530 mAh g (1) is achieved after 800 cycles at current density of 2.0 A g (1)). The outstanding electrochemical performance of the composite indicates high potential as anode material for high-performance lithium ion battery. (C) 2016 Elsevier Ltd. All rights reserved.