期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 11, 页码 12982-12989出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b22679
关键词
graphene; quantum dots; three-dimensional; flexible; high performance
资金
- Natural Science Foundation of China [21606151, 21707092, 21504057, 21878188]
- Science and Shanghai Excellent Technology Leaders Program [17XD1424900]
- Shanghai Education Development Foundation [18SG52]
- Shanghai Municipal Education Commission of Shuguang Program [18SG52]
- Shanghai Association for Science and Technology Achievement Transformation Alliance Program [LM201851, LM201977]
- Young Teachers Talent Development Fund of SIT [CHJJ-4]
- Young Teachers Talent Development Fund of Shanghai [ZZyyx19006]
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.
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