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Continuous Fabrication of Graphene-Tin Dioxide Materials through a Vapor Reaction Process

Tuesday, 10 June 2014
Cernobbio Wing (Villa Erba)
J. Feng, L. Dong, Y. Han (Tianjin Normal University), X. Li (Center of Energy and Material , Tianjin Normal University), and D. Li (Tianjin Normal University)
Graphene-tin dioxide (SnOx) nanocomposites were prepared by tin tetrachloride (SnCl4) and graphene oxides (GO) using a vapor reaction process. The SnCl4 vapor was carried into the reaction chamber via flowed argon through a bubble method. GO was dispersed in a mixture of water and ethanol, injected into an argon flow, and was then carried into the reaction chamber. At high temperature (say 800-1000 °C), GO was directly reduced to graphene nanosheets, simultaneously, the reaction between SnCl4 and water in a quartz tube resulted in graphene-tin dioxide nanocomposites. SEM and TEM observations indicate that the resultant materials are homogenous with SnOx nanoparticles assembling into clusters that are either directly attached or loaded onto the graphene. Electrochemical testing demonstrated that as-prepared nanocomposites could effectively increase cyclic performance and rate capability of tin dioxide anode compared to pristine tin dioxide anode for lithium ion batteries.