▎ 摘　　要

Silicon/reduced graphene oxide (Si/rGO) composite electrodes have been investigated for the multiple benefits of rGO in providing mechanical integrity to buffer the silicon volume expansion, while maintain-ing electronic contact with Si to provide a Li-ion transport pathway and to form a uniform solid elec-trolyte interface (SEI) layer. In particular, we extensively studied the properties of rGO particles that were reduced from three different routes, namely by heat treatment (TrGO), by chemical treatment (CrGO), and by plasma treatment (PrGO), and co-related them to the electrochemical performance of Si/rGO hy-brid anodes. Our results revealed that decreased structural and functional group defects in rGO led to a higher initial columbic efficiency (ICE) of 84%, whereas a higher sphericity of rGO particles resulted in a more stable cycle-life performance for Si/rGO electrodes with 93% capacity retention after 100 cycles at 1C/1C rates. We also observed the important role of the electrical conductivity of rGO in the electrochem-ical performance of Si/rGO at faster charging-discharging rates, resulting in a capacity of 10 0 0 mAh/g at 2C/2C rates. (C) 2021 Elsevier Ltd. All rights reserved.