▎ 摘　　要

Three-dimensional graphene is often used as electrode materials due to its excellent electrochemical properties. In this work, sulfur/nitrogen dual-doped reduced graphene oxide (SNG) foam is prepared by a simple sol-gel method with L-cysteine. Furthermore, mesoporous dioxide-titanium (TiO2) nanoparticles are deposited on the surface of SNG at 60 degrees C to improve the Li+ ions diffusion kinetics. As an anode material for lithium ion batteries, the SNG/TiO2 has an excellent reversible discharging capacity (444 mAh g(-1), 0.1 A g(-1)) and good rate capability (217 mAh g(-1), 2.0 A g(-1)). In addition, the SNG/TiO2 electrode delivers a specific capacity as high as 148.8 mAh g(-1) at a current density of 1.0 A g(-1) after 1000 cycles, and even at a high current density of 5.0 A g(-1), a reversible capacity of 99 mAh g(-1) can also be achieved. Hence, the SNG/TiO2 composite synthesized by a simple template-free method at a low-temperature is a promising anode material for lithium ion batteries. (C) 2021 Elsevier B.V. All rights reserved.