SnO2 Quantum Dots@Graphene Framework as a High-Performance Flexible Anode Electrode for Lithium-Ion Batteries

Li Gao; Guisheng Wu; Jian Ma; Tiancai Jiang; Bin Chang; Yanshan Huang; Sheng Han

doi:10.1021/acsami.9b22679

SnO₂ Quantum Dots@Graphene Framework as a High-Performance Flexible Anode Electrode for Lithium-Ion Batteries

ACS Appl Mater Interfaces. 2020 Mar 18;12(11):12982-12989. doi: 10.1021/acsami.9b22679. Epub 2020 Mar 4.

Authors

Li Gao¹, Guisheng Wu¹, Jian Ma¹, Tiancai Jiang², Bin Chang¹, Yanshan Huang¹, Sheng Han¹

Affiliations

¹ School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, 201418 Shanghai, China.
² School of Physics and Technology, and Center for Nanoscience and Nanotechnology, Wuhan University, 430072 Wuhan, Hubei, PR China.

PMID: 32078288
DOI: 10.1021/acsami.9b22679

Abstract

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.

Keywords: flexible; graphene; high-performance; quantum dots; three-dimensional.