Three-dimensional (3D) layered tin oxide quantum dots/graphene framework (SnO2 QDs@GF) were designed through anchoring SnO2 QD on the graphene surface under the hydrothermal reaction. SnO2 QDs@GF have a 3D skeleton with a large number of mesopores and ultrasmall SnO2 QDs with a large surface area. The unique design of this structure improves the specific area and promotes ion transport. The mechanically strong SnO2 QDs@GF can directly be used as the anode of lithium-ion batteries (LIBs); it displays a high reversible capacity (1300 mA h g-1 at 100 mA g-1), excellent rate performance (642 mA h g-1 at 2000 mA g-1), and superior cyclic stability (when the current density is 10 A g-1, the capacity loss is less than 2% after 5000 cycles). This novel synthetic method can further be expanded for the production of other quantum dots/graphene composites with a 3D structure as high-performance electrodes for LIBs.

中文翻译：

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SnO2 Quantum Dots @ Graphene框架可作为锂离子电池的高性能柔性阳极电极。

通过在水热反应下将SnO2 QD锚固在石墨烯表面上，设计了三维（3D）层状氧化锡量子点/石墨烯骨架（SnO2 QDs @ GF）。SnO2 QDs @ GF具有大量介孔的3D骨架和表面积较大的超小SnO2 QDs。这种结构的独特设计提高了比表面积并促进了离子传输。具有机械强度的SnO2 QDs @ GF可直接用作锂离子电池（LIB）的阳极；它显示出高可逆容量（在100 mA g-1时为1300 mA h g-1），出色的速率性能（在2000 mA g-1时为642 mA h g-1）和出色的循环稳定性（当电流密度为10时）一个g-1，经过5000次循环后，容量损失小于2％。