▎ 摘　　要

SnO2 quantum dots/reduced graphene oxide (SnO2/rGO) composite has been successfully prepared by a rapid microwave-irradiation process and subsequent annealing treatment. SEM and TEM results reveal that SnO2 quantum dots with the sizes of 1-5 nm are uniformly anchored on rGO nanosheets. The SnO2/rGO composite as an anode material presents a high initial discharge capacity of 1628 mAh/g and maintains a reversible capacity of 797 mAh/g after 100 cycles. After being cycled at various rates for 100 cycles, the capacity can recover to 777 mAh/g at 100 mA/g. The high reversible capacity, long cycling life and good rate performance can be attributed to the size effect of SnO2 quantum dots and the synergistic effect from rGO nanosheets. (c) 2017 Elsevier B.V. All rights reserved.