▎ 摘　　要

GeO2 is a promising high-performance anode material for Li-ion batteries (LIBs) because of its high theoretical reversible capacity, low operation voltage, and high thermal stability. Herein, a simple, cheap, and easily scaled-up synthetic procedure for preparing ultrathin GeO2-reduced graphene oxide (RGO) sheets is proposed and realized through a freeze-drying method. The as-prepared GeO2-RGO show non-aggregated graphene sheets and homogeneously dispersed GeO2 nanoparticles. As a high-performance anode material for LIBs, the composite shows a high specific capacity (1200 mAhg(-1) at current density of 100 mAg(-1)), good cycling performance, and rate capability.