▎ 摘　　要

Silicon/reduced graphene oxide/carbon (Si/rGO/C) composite material prepared with a carboxyl methyl cellulose and styrene butadiene rubber (CMC + SBR) hybrid binder is successfully synthesized, characterized, and evaluated as a composite anode for lithium-ion batteries (LIBs). The porous Si/rGO/C composite microspheres with interior meso-pores are obtained by encapsulating Si-based nanoparticles into the rGO/C dual-carbon matrix via self-assembling, ball milling, polystyrene sphere (PSS) template-assisting, and spray drying techniques, which facilitate a fast electron and Li+ ion transport, and mitigate Si pulverization. Compared with bare copper (Cu) foil, as-prepared Si/rGO/C composite electrode based on a carbon-coated Cu (C-Cu) foil assembled with a polyethylene (PE) separator exhibits better rate capability, in particular, at high rates, and a capacity increases to ca. 6-10%. By cycling at 400 mAg(-1) for 500 cycles, the Si/rGO/C/C-Cu composite electrode with a capacity retention (CR%) of similar to 75% and Coulombic efficiency (CE%) of similar to 99.7% retains a higher specific capacity of similar to 602 mAh g(-1) than that on bare Cu foil (similar to 314 mAh g(-1)), which is comparable to those reported in the literature. The synergistic effect of the hierarchical composite anode material together with highly adhesive and electrolyte-hydrophilic C-Cu foil results in much better electrochemical performance as a promising LIB anode. (C) 2019 Elsevier B.V. All rights reserved.