▎ 摘　　要

The significant effects of the heterogeneous structures of graphene and SiC have recently beendemonstrated for improving the performances of lithium-ion batteries (LIBs), but the synthesis remains a grand challenge, owing to the rather high reaction temperatures (> 1200 degrees C) of SiC crystallization. Herein, we present the design and synthesis of graphene/SiC composite nanosheets by using soda papermaking black liquor (SPBL) as a raw material through the in situ thermochemical method at 800 degrees C. The graphene/SiC composite has a Brunauer-Emmett-Teller surface area of 199.7 m(2)g(-1) and ex-hibited a reversible capacity of 1044 mAhg(-1) at 100 mAg(-1) when used as a LIB anode. In addition, this anode retained a stable capacity of 230 mAhg(-1) at a current density of 1 Ag-1 after 1000 cycles. Even at a high current density of 10 Ag-1, it could still deliver a capacity of 122 mAhg(-1) after 100 cycles. The superior cycle stability of graphene/SiC nanosheets is attributable to the unique nanocomposite structure. More importantly, this can effectively translate and utilize SPBL in the synthesis of high-performance electrode materials, which greatly reduces the load of SPBL on our environment.