▎ 摘　　要

A highly stable carbon-coated Sn-reduced graphene oxide (Sn-RGO-C) composite was synthesized via a super-critical methanol, high-pressure free meniscus coating, and subsequent carbothermal reduction route. During calcination, the transition of SnO2 to metallic Sn-0 occurred via carbothermal reduction. As a result, 0.25 mu m-0.75-mu m-sized Sn particles, which were uniformly coated with a carbon layer, were incorporated to the RGO sheets at a high Sn loading of 78 wt%. When tested as an anode in sodium-ion batteries (SIBs), the Sn-RGO-C electrode exhibited a high reversible capacity of 403 mAh g(-1) at 50 mA g(-1) after 150 cycles and a high rate capacity of 375 mAh g(-1) at 5 A g(-1). When paired with a NaNi0.6Co0.2Mn0.2O2 (NaNCM) cathode as a full-cell SIB, the NaNCM parallel to Sn-RGO-C cell delivered high reversible capacities of 78 mAh g(cathode)(-1) after the 50th cycle at an average voltage of similar to 2.7 V.