▎ 摘　　要

Resolving the large volume changes and achieving the ultrafast charge-discharge capability for the alloy anode of sodium-ion batteries (SIBs) are needed urgently. Rational design of unique structure is an effective strategy to solve these problems. Herein, we reported a facile route to synthesize a layer-stacked Sb@graphene (LS-Sb@G) micro/nanocomposite via solvothermal method by using a mild reducing agent. In the LS-Sb@G, the Sb nanosheets are uniformly pasted on the graphene matrix and embedded into the interlayers, which leading to the formation of tight layer-by-layer micro/nanostructure. When employed as anode materials for SIBs, the unique structural characteristics offer the LS-Sb@G micro/nanocomposite with impressive Na-storage properties, such as high Na-storage capacity of 495.2 mAh/g after 100 cycles at 125mA/g and decent rate capabilities up to 6 A/g. In addition, the LS-Sb@G electrode achieves superior electrochemical performance with a high reversible capacity of 116.5 mAh/g at 0.1 C (1 C = 120mA/g) for sodium-ion full cells. Moreover, we firstly studied the low-temperature Na-storage performance of Sb-based composite at -20 degrees C. The LS-Sb@G composite demonstrated good low-temperature properties (e.g., 506.6 and 472.5 mAh/g at 25 and 50 mA/g at -20 degrees C, respectively) for SIBs, which endow great promise as an anode material for the normal operation of electric vehicles under low temperature condition. (C) 2017 Elsevier B.V. All rights reserved.