Gao Li, Wu Guisheng, Ma Jian, Jiang Tiancai, Chang Bin, Huang Yanshan, Han Sheng
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, 201418 Shanghai, China.
School of Physics and Technology, and Center for Nanoscience and Nanotechnology, Wuhan University, 430072 Wuhan, Hubei, PR China.
ACS Appl Mater Interfaces. 2020 Mar 18;12(11):12982-12989. doi: 10.1021/acsami.9b22679. Epub 2020 Mar 4.
Three-dimensional (3D) layered tin oxide quantum dots/graphene framework (SnO QDs@GF) were designed through anchoring SnO QD on the graphene surface under the hydrothermal reaction. SnO QDs@GF have a 3D skeleton with a large number of mesopores and ultrasmall SnO QDs with a large surface area. The unique design of this structure improves the specific area and promotes ion transport. The mechanically strong SnO QDs@GF can directly be used as the anode of lithium-ion batteries (LIBs); it displays a high reversible capacity (1300 mA h g at 100 mA g), excellent rate performance (642 mA h g at 2000 mA g), and superior cyclic stability (when the current density is 10 A g, 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.
通过水热反应将二氧化锡量子点（SnO QD）锚定在石墨烯表面，设计出了三维（3D）层状二氧化锡量子点/石墨烯框架（SnO QDs@GF）。SnO QDs@GF具有带有大量中孔的3D骨架以及具有大表面积的超小SnO QD。这种结构的独特设计提高了比表面积并促进了离子传输。机械强度高的SnO 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下为1300 mA h g）、优异的倍率性能（在2000 mA g下为642 mA h g）和出色的循环稳定性（当电流密度为10 A g时，5000次循环后容量损失小于2%）。这种新颖的合成方法可进一步扩展用于生产其他具有3D结构的量子点/石墨烯复合材料，作为LIB的高性能电极。
