▎ 摘　　要

Li[Li1/3-2x/3NixMn2/3-x/3]O-2 is currently receiving considerable attention for its use as a modern cathode material for lithium-ion batteries (LIBs), owing to its high capacity of over 250 mAhg(-1) when charged to 4.5 V or higher. However, owing to the rapidly fading capacity and poor rate capability of Li[Li1/3-2x/3NixMn2/3-x/3]O-2 materials, extensive efforts have been made in recent years to improve their rate capability. In this paper, a Lirich and manganese-based D1.9Ni0.35Mn0.65O2 cathode material was prepared by a carbonate co precipitation method, and graphene, which provides high conductivity and thermal stability, was used during the slurry mixing process. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize their structure and microstructure. The electrochemical properties show that the initial discharge capacity and cycle stability were enhanced due to the high electrical conductivity and thermal stability of graphene.