Sn/SnOx embedded in carbon nanosheets as high-performance anode material for lithium ion battery

A facile and scalable strategy is developed to fabricate carbon nanosheetS encapsulated Sn/SnOx nanoparticles as anode material for lithium ion battery. In the constructed architecture, the carbon nanosheets can effectively not only avoid the direct exposure of Sn/SnOx to the electrolyte but also suppress the aggregation of nanoparticles and buffer the volume expansion during the charge and discharge process. Electrochemical measurements demonstrated that the Sn/SnOx/C composite delivered a reversible capacity of 577 mA h g(-1) at a current density of 500 mA g(-1) after 200 cycles. Even at a very high current density of 5 A g(-1), a specific capacity of 385 mA h g(-1) was also obtained. These outstanding results suggest the Sn/SnOx/C composite as a promising anode material for high-performance lithium ion battery. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.