▎ 摘　　要

To form hierarchical anode materials for fast lithium-/sodium storage, nanocrystallites SnO2 (5 nm) on reduced graphene nanosheets (rGO) are successfully synthesized through ultrasonication and cryodesiccation, the as produced SnO2/rGO clusters are homogeneously connected by carbon nanotube (CNT) through cryodesiccation. rGO with high specific surface area efficiently buffers the volumetric change and the pulverization of SnO2 during lithiation/delithiation process. CNTs not only hinder the restack of SnO2/rGO clusters but also as conductive bridges connect the scattered SnO2/rGO clusters, which consequently improve the cycle stability and rate performance of samples. At the current density of 0.1 A g(-1), SnO2/rGO/CNT sample presents the initial discharge and charge capacities of 1678.6 and 1091.2 mAh g(-1). At 5 A g(-1), SnO2/rGO/CNT sample delivers 434.7 mAh g(-1) that is higher than SnO2/rGO sample with 251.7 mAh g(-1). Moreover, the SnO2/rGO/CNT - LiCoO2 full cell shows high capacity of 852.6 mAh g(-1) at 0.1 A g(-1) with a CE of 99.4%. The result indicates that CNTs can effectively achieve the integrity of the material by connecting other clusters of metal oxides and rGO.