▎ 摘　　要

A preform-decomposition process is employed to prepare a composite of MoO2 nanoparticles (approximate to 100nm) anchored on graphene oxide (MoO2/GO) for sodium-ion battery anodes. The discharge gravimetric (volumetric) capacity of the MoO2/GO is 483 mAhg(-1) (by active material approximate to 2318 mAhcm(-3)) at the current density of 100 mAg(-1) after 10 cycles. After 100 cycles, the discharge gravimetric (volumetric) capacity was maintained at 345 mAhg(-1) (approximate to 1656 mAhcm(-3)) and stabilized. During the first 1000 cycles, the capacity degradation is only 1.9% for each 100 cycles, and the electrode is still able to deliver 276 mAhg(-1) after 1000 cycles. Moreover, the nanostructures are able to withstand high rate cycling, the capacity can be fully recovered after being cycled at a rate as high as 2000 mAg(-1). The promising electrochemical performance can be attributed to the high electronic conductivity of MoO2 and the connected nanostructures, which facilitate both fast electronic and ionic transport.