A facile synthesis of mesoporous graphene-tin composites as high-performance anodes for lithium-ion batteries

Graphene-based metals and their oxides usually exhibit enhanced electrochemical behavior in lithium-ion batteries due to the outstanding properties of graphene. Moreover, the structure and morphology of electrodes can also take an important role in their electrochemical properties. Herein we describe a facile synthesis of graphene-Sn composites containing ca. 3-6 nm diameter mesopores formed by aggregation of Sn nanoparticles on the graphene surface. These mesoporous composites with large surface area deliver higher capacity and better cycle performance in comparison with pristine Sn particles. Furthermore, the mesoporous composites treated under hydrothermal treatment exhibit higher rechargeable capacities and cycle performances. (C) 2012 Elsevier Ltd. All rights reserved.