▎ 摘　　要

A facile high-temperature solution route to a monodisperse core-shell structure of MnO (core) and MnFe2O4 (shell) (abbreviated as MFO) nanoparticles anchored on reduced graphene oxide (rGO) has been established. Subsequently, MnO@MnFe2O4@rGO nanocomposites are utilized as advanced anode materials for high-performance Li-ion batteries. MnO@3MFO@rGO containing 22.5wt% of the rGO composite (with a 1:3 molar ratio of MnO/MFO) as the electrodes delivered a remarkable cycling performance, that is, 587.8mAhg(-1) at a current density of 200mAg(-1) after 200 cycles at ambient temperature with an ultralow capacity fading (0.10% per cycle). More importantly, the electrodes afforded excellent capacity stability under various operation temperatures (ca. -20 to 70 degrees C), such as an excellent reversible capacity of 1067mAhg(-1) at a current density of 500mAg(-1) after 300 cycles at 60 degrees C, and remarkable low-temperature performance of a reversible capacity of 208.7mAhg(-1) at a current density of 200mAg(-1) at -20 degrees C. Therefore, MnO@3MFO@rGO nanocomposites are considered as promising battery materials that can be operated in harsh environments.